concrete test equipment

Concrete Maturity Meter: VedaConMat14 by Vedantrik Technologies is a device designed to accurately estimate the maturity of concrete using highly sensitive and precise temperature sensors. By measuring temperature variations within the concrete, the device calculates the maturity value, which is then correlated with strength to develop a reliable maturity index. This index is used to determine the in-situ compressive strength of concrete, enabling real-time monitoring of both precast and cast-in-place concrete. The device is equipped with four sensor ports, allowing connection of four temperature sensors simultaneously. These sensors are embedded into the concrete at the construction site to measure temperature continuously. The maturity value is then calculated based on the recorded temperature data and correlated with the concrete strength. This correlation must be established for the specific concrete mix design following ASTM C1074 standards and remains valid as long as the mix design does not change. VedaConMat14 logs temperature data every 30 minutes, averaging 60 individual readings collected at 30-second intervals to provide precise and stable temperature values over time. This continuous monitoring ensures a detailed temperature profile throughout the curing process. For seamless connectivity, VedaConMat14 features a built-in Wi-Fi Hotspot, allowing wireless connection from laptops, PCs, or mobile devices. Its web-based software interface provides real-time visualization of temperature, maturity, and strength data directly from the device. Furthermore, when connected to an office Wi-Fi network and synced with Google Drive, all logged data is automatically uploaded to the cloud. This allows remote access to the concrete maturity and strength information from anywhere in the world via Google Drive. Key features of Concrete Maturity Meter : VedConMat14 1. Temperature Sensing Range: 0 to 100°C with ±1°C Accuracy: VedaConMat14 can measure temperatures from freezing point (0°C) up to 100°C, covering the entire typical range for concrete curing. The sensors provide highly accurate readings, with a small possible error margin of just plus or minus one degree Celsius, ensuring reliable temperature data for maturity calculations. 2. Low-Cost Sacrificial Sensors, Reusable Measuring Unit: The temperature sensors used are designed to be low-cost and sacrificial, meaning they can be embedded directly into the concrete and disposed of after use. However, the main measuring unit, which collects and processes data from these sensors, is reusable for multiple projects, reducing overall costs. 3. Automatic Data Logging with User-Defined Intervals: The device automatically records temperature data at intervals set by the user. This flexibility allows adjusting the frequency of measurements based on project requirements—whether data is needed every few minutes or hours—making monitoring efficient and tailored. 4. Available in Multiple Channel Options VedaConMat14 supports different versions with varying numbers of sensor ports (channels). This allows monitoring temperature at multiple points within the concrete, which is especially useful for large pours where temperature can vary across the mass. 5. Web-Based Software for Data Logging and Report Download The system comes with easy-to-use web-based software accessible through any device connected to the VedaConMat14 Hotspot. This software allows viewing real-time data, managing logged data, and downloading detailed reports for record-keeping and analysis. 6. Graphical Representation The software provides clear graphical charts that plot temperature changes over time, Maturity vs. Time, Maturity vs. strength. These graphs help visualize the curing process, showing how temperature rises and falls during hydration. Such visual data assists engineers in quickly assessing whether concrete is curing done properly and supports making informed decisions about strength development and construction scheduling. Monitoring the strength development of concrete during early curing is essential for safe construction scheduling. The Concrete Maturity Meter provides real-time data on temperature history to estimate in-place strength, making it a crucial tool for project managers. In Mumbai’s high-rise and infrastructure projects, where deadlines are tight, maturity meters allow engineers to determine the right time for formwork removal, post-tensioning, or opening structures to service. Vedantrik Technologies offers advanced maturity meters that are easy to deploy and deliver accurate strength estimations. By using this device, contractors avoid unnecessary delays while ensuring safety. It reduces reliance on time-based curing estimates and instead relies on actual strength data, leading to better efficiency and reduced costs. For high-performance concrete maturity meters in Mumbai, connect with Vedantrik Technologies and achieve safer, smarter, and faster construction results. Concrete Maturity method is a fundamental concept that is used to estimate the early-strength development of concrete based on its time & temperature history. It follows the principle that the strength development of the concrete is directly influenced by both time and temperature. The maturity method as defined by ASTM C1074 provides a reliable, non-destructive way to assess the in-situ concrete strength development over time. This standard is widely used in structural monitoring, quality control, and construction scheduling where early-age strength prediction is critical. Concrete maturity refers to the cumulative effect of both temperature and time on strength development in concrete. The main objective behind the maturity method is that concrete does not gain strength based on age but rather how temperature has influenced its hydration process over time. The process of hydration is temperature dependent, where higher temperature accelerates the reaction and, in turn, the strength gain, while lower temperatures show an opposite effect. Hence maturity is also defined as a time-temperature factor or function. By integrating temperature over time, maturity index can be established, which is typically expressed in °C·hours or °C·days, that correlates with strength development. The co-relation between maturity and strength is empirical and must be established for each specific concrete design, as it is generally accepted that concrete of a specific mix design will develop the same compressive strength if it reaches the same maturity index, for example if a concrete mix (A) is achieving the maturity index of value Z 0C.hrs in X days at Y 0C , and there is a concrete mix (B) is also achieving the same maturity index that is of value Z 0C.hrs in P days at Q 0C still both will develop same compressive strength as the maturity indexes are same. This assumption enables project teams to assess strength development in real time, improving the quality control without the need of frequent destruction. Purpose of Concrete maturity method: 1. To determine in-situ concrete strength using the time-temperature history of the structure, in accordance with ASTM C1074. 2. Provides a non-destructive alternative to traditional testing methods. 3. Helps in improving the structural safety by ensuring that critical construction activities are performed only after the concrete has reached the required strength. 4. Enhance control over curing conditions by allowing for assessment of temperature related-effects on strength development. Supports mix design optimisation by allowing the study of variables like admixtures, cement types, or curing conditions effect on strength development. 5. Facilitate compliance with standards through data-driven, quantifiable verification of strength development. Principle behind Concrete Maturity Measurement Method: The concrete maturity method is an empirical technique employed to predict the development of strength in concrete as a function of its temperature-time history. The fundamental principle underlying this method is that the rate of cement hydration process, along with the consequential strength gain, is not only influenced by the age of the concrete since the time of casting, but primarily by the combined effect of time and temperature. In essence the maturity method is useful in quantifying the degree of hydration by integrating temperature over time, thereby allowing to estimate the strength of in-situ concrete with great accuracy, especially during the early stages of curing. Concrete strength gain is intrinsically linked to the kinetics of cement hydration, a complex exothermic reaction between water and cementitious materials such as tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium aluminoferrite that leads to formation of calcium-silicate-hydrate (C-S-H) gel and other reaction products that contribute materials structural integrity. The rate of these hydration reactions are temperature dependent, so elevation in temperature increases the rate, mainly because of reduced activation energy barrier, while lower temperatures affect it in the opposite manner. However, this same hydration process can result in excessive heat generation that has a direct effect on the morphology and distribution of the hydration products. Hence, it can lead to temperature induced changes in the micro-structures, porosity and micro-cracking due to differential thermal gradients, especially in mass concrete. Furthermore elevated temperature can also affect the natural evolution of the micro-structures in the concrete, thereby affecting the structural and mechanical properties beyond that could be assessed by the maturity method. Measurement of Maturity and strength: Nurse-Saul function is the widely used method, which assumes that there is a linear relationship between temperature and the rate of hydration. The general formula is expressed in the form given below: M(t) = ∑ (Ta - T0) * Δt Where : M(t) = the temperature-time factor at age t, degree-days or degree-hours, Δt = time interval, days or hours, Ta = average concrete temperature during time interval, Δt, °C, and To = datum temperature, °C. After calculating the maturity values for each of the specified curing days and determining the corresponding compressive strengths from the CTM (Compression Testing Machine) results, plot a graph of maturity index versus compressive strength. Fit a trend-line to the data to identify the best-fit relationship, typically a logarithmic regression provides a good representation of the strength development in relation to maturity. Fc = a + b * log10 (M) Components of Concrete Maturity Method: 1. Temperature Monitoring Equipment - Devices to measure and record concrete temperature over time. 2. Concrete Strength Testing - Standard strength tests (e.g., ASTM C39 – Compressive strength of cylindrical concrete specimens). 3. Reference Temperature - A specific temperature used in maturity calculations. For Nurse–Saul, the typical reference is 0°C (32°F) unless otherwise specified. 4. Concrete Mix Design Information - The maturity method is mix-specific; a separate calibration curve is required for each mix. 5. Data Collection and Analysis Tools - Software or spreadsheets to calculate maturity and estimate strength. Ensures real-time tracking and reporting. Standard procedure: Overview (as per ASTM C1074) 1. Objective of Maturity Method Calibration The primary objective of the calibration process in ASTM C1074 is to establish a reliable relationship between concrete maturity and its compressive strength for a specific concrete mix. This relationship—called the strength–maturity curve—enables users to estimate in-place concrete strength based on temperature history rather than destructive testing. Since the maturity method is mix-specific, each unique concrete mixture requires its own calibration. 2. Selection and Preparation of Concrete Mix The calibration begins by selecting the specific concrete mix that will be used in the field. This includes confirming the materials, proportions, and mixing procedure. Fresh concrete from this mix is then used to cast a set of standard specimens depending on the project requirements, which will be cured and tested over time to develop the strength–maturity relationship. 3. Temperature Monitoring of Specimens To track the maturity development, thermocouples or temperature sensors are embedded in at least two of the cylinders immediately after casting. These sensors record the internal temperature of the specimens continuously over time. The temperature data is used to calculate the maturity index using either the Nurse–Saul function or the Arrhenius function, as specified in ASTM C1074. 4. Curing and Strength Testing Schedule The concrete specimens are cured under standard laboratory conditions, and are tested for compressive strength at multiple time intervals; for example, at 1, 3, 7, 14, and 28 days. The specific times should span the range of expected strengths during field monitoring. At each test age, the corresponding maturity index is calculated based on the recorded temperature history. 5. Developing the Strength–Maturity Relationship After collecting the strength and maturity data at each age, the results are plotted with concrete strength on the y-axis and maturity index on the x-axis. A best-fit curve (usually exponential or logarithmic) is applied to the data points to define the strength–maturity relationship for the given concrete mix. This curve becomes the foundation for estimating in-place strength based on measured maturity in the field. Result Interpretation of Concrete Maturity Method: Result interpretation in the maturity method involves comparing the maturity index (°C·hours or °C·days) calculated from the in-situ concrete to a previously developed calibration curve that relates maturity to compressive strength. By identifying the maturity value measured in the field and locating that point on the calibration curve, the corresponding compressive strength can be estimated. This allows for a reliable prediction of the in-place concrete strength at any given time, provided the conditions match those used during calibration. Factor influencing Concrete Maturity Method: 1. Temperature Measurement Accuracy: Proper placement and calibration of temperature sensors are crucial. Incorrect readings due to poor installation or equipment issues can lead to inaccurate maturity and strength estimates. 2. Calibration Curve Quality: The maturity-strength relationship must be based on accurate, consistent lab testing. Any errors in sample preparation, curing, or testing can compromise the validity of field results. 3. Mix Design Consistency: Variations in concrete mix (e.g., cement type, water content, admixtures) between the lab and field can affect strength development, making maturity estimates unreliable if not properly accounted for. 4. Curing and Environmental Conditions: While temperature is monitored, factors like moisture loss and poor curing practices can slow strength gain, leading to overestimated strength if maturity is used alone. 5. Data Recording Frequency: Infrequent or interrupted temperature logging can distort the maturity calculation. ASTM recommends frequent intervals (e.g., every 30 minutes) for accurate tracking. 6. Thermal Gradients in Large Sections: In large pours or mass concrete, different parts of the element may heat and cool at different rates. A single sensor may not represent the entire structure, leading to localised over- or underestimation of strength. As a best Concrete Maturity Meter Manufacturer in India we have supplied in Mumbai, Pune, Nashik, Aurangabad, Surat, Vadodara, Ahmedabad, Indore, Bhopal, Nagpur, Jaipur, Ludhiana, Ghaziabad, Delhi, Lucknow, Kanpur, Prayagraj, Patna, Ranchi, Dhanbad, Bengaluru, Hyderabad, Chennai, Coimbatore, Madurai, Visakhapatnam, Kolkata, and Srinagar. Also we have supplied a range of products in Dubai, Abu Dhabi, the United Arab Emirates, Oman, Saudi Arabia, Kuwait, and Iran. We also serve clients in Singapore, Indonesia, Thailand, and other international locations.

Curing Tank Temperature Controller to Maintain 27 +/-2 with immersion Heater & Chiller: Automatic curing tank temperature controller developed by Vedantrik technologies will help to maintain 27 +/- 2 degree Celsius, in the curing tank where concrete cubes are kept for the curing . When it comes to larger infrastructure projects and construction sites, the concrete cubes are casted on site in large numbers, then the curing tanks have limitation of size hence there is a need of onsite concrete curing tanks where concrete cubes are kept for curing. the large number of cubes that require proper water curing to ensure strength and durability. A critical aspect of proper curing is maintaining a consistent water temperature of 27 ± 2 degree C (I.e., between 25 to 29 degree C), which becomes increasingly difficult in an uncontrolled environment. To tackle this issue, the main controller is equipped with a 2 and 4 channel temperature controller, paired with a waterproof and shockproof stainless steel heater, specifically designed for immersion in curing tanks. The main unit also comes with waterproof temperature sensors that continuously monitor the curing tank temperature and provide real-time feedback to the controller. The automatic controller ensures that the heater is turned ON when the temperature in the tank falls below 25 degree C and OFF when it exceeds 29 degree C, thus maintaining the optimal temperature for curing, without the need for manual intervention. The stainless steel immersion heater has a temperature handling capacity ranging from 0 to 100°C, making it suitable for a variety of environments and use cases. The system's automatic ON/OFF control mechanism ensures energy efficiency, safety, and consistent temperature regulation, which is vital for maintaining the integrity of concrete test specimens. Its shock proof and protection against shock and earth leakage makes it very useful for onsite applications. Key features: 1. Precise Temperature Control (25°C to 29°C Range): The controller is designed to maintain water temperature within the optimal curing range of 27 ± 2°C, as specified in IS 516. It automatically activates the heater when the temperature drops below 25°C and cuts it off once it exceeds 29°C. This ensures consistent curing conditions crucial for accurate concrete strength testing. 2. Multi Channel Operation: The system features a Multi channel controller, allowing it to manage the multiple heater and temperature sensor simultaneously. This Multi channel setup enhances reliability, especially useful for larger curing tanks or setups with varying thermal loads or two different channels can be used for two different tanks if the water capacity is within range. 3. Waterproof and Shockproof Design: all the immersion heater and temperature sensor are designed to be fully waterproof and shockproof, ensuring safe operation in wet environments. This is especially important for construction sites where durability and safety are top priorities. 4. Stainless Steel Immersion Heater: The heater is made from high-grade stainless steel, offering resistance to corrosion and extended durability. It supports a wide operating temperature range (0°C to 100°C ± 1°C) and is suitable for long-term immersion in curing tanks without degrading. 5. Automatic On/Off Mechanism: The controller uses an automated switching system that turns the heater on or off based on real-time temperature feedback. This not only simplifies operation but also improves energy efficiency and prevents overheating or under-curing of concrete specimens. 6. High-Capacity Support: The controller supports immersion heaters up to 3000 Watts (3 kW), making it ideal for large curing tanks that require faster and more efficient heating. A curing tank temperature controller is an essential component in maintaining the ideal temperature environment required for curing of concrete samples. The device ensures that the curing takes place under controlled thermal conditions, which is essential for achieving optimal material properties like strength , durability, and structural integrity over time. As mentioned by IS 516 code, the ideal temperature for concrete curing is 27 ± 2 degree C, at which the concrete achieves optimal development. Hence, the controllers are specifically designed to regulate and stabilise the water’s temperature within the curing tank, maintaining it around 27 ± 2 degree C as per the standard requirement. Unlike general purpose thermostats, curing tank temperature controllers are specifically designed for laboratory and industrial settings where minor temperature fluctuations can significantly affect the curing process. The temperature controller continuously monitors the water temperature using highly temperature sensors, typically thermocouples or resistance temperature detectors (RTDs) which provide real-time feedback. This temperature value is used to dynamically adjust the heater placed in the curing tank, to ensure that the temperature remains within the tolerance range. Additionally, some construction materials are particularly sensitive to curing conditions. The hydration reaction of the cement, which is fundamental to the development of strength and integrity in concrete, is exothermic and highly influenced by surrounding temperature. Too low temperature can slow down the reaction and result in underdeveloped mechanical properties, while excessive heat may lead to rapid evaporation, shrinkage or micro-cracking. Therefore the role of curing tank temperature becomes pivotal in preserving the homogeneity and reproducibility of curing conditions, especially in quality control laboratories, research institutions, and construction testing facilities. Purpose of curing tank temperature controller: 1. Essential for maintaining a constant temperature to ensure curing water stays at a stable temperature (27 ± 20C) for consistent curing. 2. Ensures proper cement hydration, providing ideal conditions for the hydration of cement, leading to proper strength development in concrete specimens. 3. To prevent over-heating or under-heating or any temperature fluctuations that can negatively affect the curing process and compromise concrete quality. 4. Enables automatic temperature regulation and continuous monitoring, reducing the need for manual intervention. Principle of Curing: The effectiveness of concrete curing is fundamentally governed by the physicochemical and thermodynamic conditions to which the cementitious matrix is exposed during the early stages of hydration. The curing environment particularly in immersion based systems such as curing tanks plays a pivotal role in regulating the moisture availability, temperature equilibrium, ionic mobility, and phase development within the hydrated cement paste. At the core, curing tank functionality is primarily important to sustain a saturated aqueous environment that ensures uninterrupted progression of cement hydration reaction. Concrete strength gain is intrinsically linked to the kinetics of cement hydration, a complex exothermic reaction between water and cementitious materials such as tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium aluminoferrite , which requires continuous availability of water. In the absence of adequate moisture, endogenous shrinkage may halt the hydration process prematurely that may lead sub-optimal development of calcium-silicate-hydrate (C-S-H) gel and other reaction products that contribute materials structural integrity. However, the immersion curing via a water tank mitigates this risk by establishing a thermodynamically stable water-rich boundary at the concrete surface. This condition then eliminates formation of moisture gradient and suppressive evaporation, thereby preserving the internal humidity at 95% , which is critical for advancements of later-stage hydration. Additionally, water also provides a medium for heat dissipation of heat and ionic species, which in turn maintains the thermal homogeneity and equilibrium phase distribution across the concrete mix. Therefore, temperature regulation within the curing tank is equally important, as the rate and the extent of hydration is temperature-sensitive. At temperatures below the optimal range the rate of hydration process is significantly lower, resulting in reduced early-stage strength, and potential issues with delayed ettringite formation (DEF). Conversely, curing at elevated temperatures can accelerate the early hydration, promoting rapid calcium-silicate-hydrate (C-S-H) gel precipitation near the cement surface. This can lead to formation of diffusion limiting shells, which impedes inward diffusion of water and ions, thereby disturbing the long-term strength development in concrete. As per IS 516, the standard temperature for curing recommended is 27 ± 2 degree C, as this range provides an optimal balance between kinetics and structural integrity of the hydration products. This is particularly critical in the formation of porosity, high durability matrix. The solubility equilibrium of calcium hydroxide (Ca(OH)2), which is one of the major byproducts of hydration, is also temperature dependent. Higher temperatures can decrease the solubility of Ca(OH)2, which may lead to supersaturation and premature precipitation, which then influences the availability of calcium ions, necessary for polymerisation of silicate chains in C-H-S. Therefore the role of curing tank temperature becomes significantly important in preserving the homogeneity and micro-structural integrity of concrete mix during the curing process. Formula to find the Power, Heat, Time required to maintain the temperature of Water 27+/-2 degree celsius in a Curing Tank Step1: Calculate the mass of water by calculating the volume of your tank. For example the Tank Size is 3x2x0.6 meter Volume of water if tank is fully filled = 3x2x0.6 = 3.6 (Meter Cube) Mass of water = density of water * Volume of water= 1000*3.6= 3600Kg Step2: Calculate the heat required Formula : Q= m*Cp*(t2-t1) Q= heat Required in Joules . (J) m= Mass of Water in kg Cp= Specific capacity of heat for water (4184 j/kg.k rounded to 4200) t2= The final temperature which need to be achieved t1= Lower temperature or ambient temperature Let’s consider temperature of your city or ambient temperature is 20 degree Celsius and temperature required to maintain is minimum 25 degree Celsius. Q= m*Cp*(t2-t1) = 3600*4200*(25-20)= 75,600,000 Joules or 75,600 KJ So if we consider to supply 75,600KJ of heat Per second then that becomes a power as power is P=(Q/T) hence P= 75,600KW In practicality the available heaters are of 3KW which mean heater will supply 3KJ of heat per second, hence to supply 75,600 KJ of Heat using a heater of capacity 3KW it will require (75600/3)=25200 seconds , Means 7 hours (assuming No Heat Loss) will be required which is high response time, hence the Number of heater need to be increased based on the required response time or the size of tank. For the above case if we use 4 Heaters of 3KW capacity, it will take 1 hour and 45minutes to raise the temperature of water from 20 to 25 degree celsius, with the given tank size and assuming no heat loss and the tank is fully filled. Key Considerations 1. Consistency of Units:Ensure your units are consistent. If using Celsius for ΔT, use the specific heat capacity for J/kg·°C or J/kg·K. 2. Heating Time: Be specific about how quickly you need the water to reach the target temperature. A shorter time requires more power. 3. Heat Losses: These calculations provide a minimum theoretical power. In reality, some heat will be lost to the surroundings, so you may need to account for that Main components of curing tank temperature controller: 1. Temperature Controller Unit: To continuously monitor and regulate the temperature condition during the curing process. 2. Temperature sensors: RTD or thermocouples that measure the water temperature inside the curing tank. 3. Heater: An electric immersion heater to raise the water temperature as needed. Typically activated by the controller to maintain the desired curing temperature. 4. Display interface: Allows the to set and monitor temperature in real-time. 5. Chiller: Required in summer Standard Procedure: Overview 1. Filling the Tank with Water Fill the tank with clean, preferably distilled or potable water to the required level. The water should cover specimens completely during curing. Impurities in water can affect all sensor performance and specimen quality. 2. Installing the Temperature Probe or Sensor The temperature probe or sensor should be securely placed inside the tank, typically at mid-depth, to monitor the water temperature accurately. It must be fully submerged and away from the heating or cooling element to avoid false readings. Ensure that the sensor cable is routed safely to avoid kinks, tension, or contact with hot surfaces. 3. Connecting Heater Place and connect the heater (and cooling system, if applicable), after immersing the heater should be positioned low in the tank, fully submerged, and spaced away from the tank walls and sensors. Improper installation can lead to inconsistent temperature or damage to the components. 4. Connecting the Controller Connect the controller to the sensor and heating/cooling system. Use appropriate terminals and ensure secure electrical connections. Plug into a grounded power source and power on the system to begin monitoring temperature. Factors Influencing Curing Tank Temperature Controller a) Ambient Temperature External environmental conditions can significantly impact the tank’s internal temperature. High ambient temperatures can cause overheating, while low surroundings may strain the controller to maintain the desired range. b) Thermostat Sensitivity The responsiveness and calibration of the thermostat directly affect temperature accuracy. Poorly calibrated thermostats may lead to under- or over-heating of the curing water. c) Water Circulation Inadequate or uneven water circulation can lead to temperature stratification, where some parts of the tank are hotter or cooler than others. Proper circulation ensures uniform curing. d) Heater Efficiency The efficiency and capacity of the heater to determine how quickly and evenly the water reaches and maintains the set temperature. Aging or faulty heaters may lead to slow or inconsistent heating. e) Insulation Quality Good insulation helps maintain a stable internal temperature by reducing heat loss to the environment. Poor insulation increases energy use and makes the system more prone to fluctuations. Proper curing is essential to achieve the intended strength and durability of concrete. The Curing Tank Temperature Controller ensures that curing tanks maintain precise temperature levels for specimen preparation and testing. Vedantrik Technologies manufactures reliable curing tank temperature controllers and heaters that comply with testing standards. In Mumbai, where construction labs handle large numbers of samples daily, these devices help maintain consistent curing conditions, ensuring accuracy in strength tests. By using advanced temperature controllers, engineers can eliminate variations that compromise test results. This leads to more dependable data, ultimately supporting better material selection and structural performance. For efficient curing tank temperature controllers, contact Vedantrik Technologies and ensure consistent accuracy in your concrete testing process. Technical Specifications: Unit A: Controller 1. Universal Power: 230V AC, Single Phase. For 2 channel system 2. Three Phase AC For 4 channel system 3. Max Current Handling Capacity 32Amps Unit B: Temperature Sensor 1. Temperature Range 0 - 100 degree celcius. 2. Wirelength 5meters Unit C: Heater 1.Single Phase for two channel system 2. Three Phase for Four channel system 3. Capacity Per Heater 3KW As a best Curing Tank Temperature Controller system Manufacturer in India we have supplied in Mumbai, Pune, Nashik, Aurangabad, Surat, Vadodara, Ahmedabad, Indore, Bhopal, Nagpur, Jaipur, Ludhiana, Ghaziabad, Delhi, Lucknow, Kanpur, Prayagraj, Patna, Ranchi, Dhanbad, Bengaluru, Hyderabad, Chennai, Coimbatore, Madurai, Visakhapatnam, Kolkata, and Srinagar. Also we have supplied a range of products in Dubai, Abu Dhabi, the United Arab Emirates, Oman, Saudi Arabia, Kuwait, and Iran. We also serve clients in Singapore, Indonesia, Thailand, and other international locations.

Anvil for Rebound Hammer Calibration Anvil is used as a certified reference Material to verify the Rebound Hammer calibration, Generally Rebound Hammer should give 80+/-2 on standard Anvil, having Rockwell Hardness HRC 66+/-2 as per IS 516 if the rebound hammer is functionally in good and calibrated condition. Its primary purpose is to provide a standardised and consistent reference for checking and calibration of the accuracy of the rebound hammer (also known as Schmidt Hammer), which is widely used to assess the surface hardness and estimate the compressive strength of concrete structures. Over time, the mechanical components of the rebound hammer, such as the spring, plunger, and the impact mass can undergo wear and tear, leading to deviations in the rebound readings. The steel anvil allows it to identify such errors, so that they are corrected before the hammer is used on the actual concrete surface. The calibration anvil is constructed from high-grade alloy, hardened, and tempered to achieve surface uniformity and mechanical strength, ensuring that energy losses due to vibration or movement are minimised. The impact surface of the anvil has a Rockwell hardness of approximately HRC 66 ± 2 as per IS 516, which provides a very dense surface similar to an idealised standard. This ensures that when the rebound hammer’s plunger strikes the anvil, the resulting rebound number depends solely on the impact energy and hammer’s internal mechanism and not on surface inconsistency. During the calibration process, the rebound hammer is held perpendicular to the anvil’s surface, and multiple test impacts, usually between 6 - 8 strokes performed. The average rebound number is compared to the standard reference values, which should be generally 80 ± 2, and if the reading falls within this range, the hammer is considered properly calibrated. However, if significant deviation is observed, it indicates that the hammer may need Repair, or mechanical servicing is required to restore its accuracy. Hence using a properly calibrated rebound hammer on Anvil guarantees that subsequent concrete test Rebound Hammer is accurate. Purpose of Anvil: 1. To ensure that the rebound hammer gives a consistent and accurate rebound number. 2. Useful for verifying the rebound hammer performance. 3. Calibration on the anvil helps to identify wear and tear, spring weakness, or other faults in the hammer. 4. Using Anvil ensures the hammer meets requirements of different standards like IS 516, ASTM C805. Principle of Anvil: The calibration of a rebound hammer fundamentally depends on the interaction between the hammer’s plunger and a reference material with well characterised mechanical properties. The Anvil is employed as this reference due to its near-ideal elastic behaviour, uniform density, and negligible energy loss under impact. Unlike concrete, which is heterogeneous and can exhibit variable mechanical responses, steel anvil provides a highly consistent and predictable surface for the hammer to strike. Its high elastic modulus, along with high strength, ensure that the contact between the hammer’s plunger and the steel surface remains almost entirely elastic, with minimum permanent deformation. This consistency allows the rebound hammer to give reproducible rebound readings, which serves as a benchmark for instrument calibration. The principle behind this process is rooted in its basic mechanics, where the rebound hammer’s plunger strikes the surface with defined velocity, and part of its kinetic energy is returned as it rebounds. The amount of energy returned, and hence the rebound distance or reading, depends on the hardness and elasticity of the surface. When the hammer strikes the plunger in contact with the anvil’s surface, it absorbs virtually no energy through plastic deformation, and rebounds with a velocity close to its theoretical maximum for a perfectly elastic collision. This makes the steel anvil ideal standard, providing a reference rebound value that is consistent and unaffected by the natural variability present in materials like concrete. Additionally,by providing a stable reference, it allows for the detection of systemic errors, verification of the internal plunger and spring mechanism, and identification of any calibration drift over time. Components: 1. Anvil: A solid, hardened steel block with a flat, polished surface used to calibrate rebound hammers. As per IS 516 anvil should have Rockwell hardness of approximately HRC 66 ± 2. Standard Procedure for Rebound Hammer Calibration: Overview 1. Preparation of the Anvil: Place the steel anvil of a rigid surface, and ensure the top surface is clean, to get accurate and repeatable impact measurements. 2. Positioning the Rebound hammer: Hold the rebound hammer perpendicular to the anvil surface. Take readings: Press the hammer against the anvil until the plunger releases, then record the rebound reading. Repeat the measurement at least five times. 3. Checking the calibration: Compare the average rebound value with the standard reference values, and if the reading falls within the range, the hammer is considered properly calibrated. Deviations indicate that the hammer may need re-calibration or maintenance. Result interpretation: For calibration, the rebound hammer is held vertically downward and pressed against the surface of the anvil until the plunger is released, then the rebound number is recorded. This step is performed multiple times and the average rebound value is calculated. The average rebound number is compared to the standard reference values, which is 80 ± 2, and if the reading falls within this range, the hammer is considered properly calibrated. Factors Influencing the Anvil Calibration of Rebound Hammer: 1. Surface Hardness and Condition of the Anvil: The reference anvil must have a standardised hardness (HRC 66 ± 2). Any wear, dents, or corrosion on its surface can change the rebound energy , leading to inaccurate calibration results. 2. Operator’s Technique: Variations in holding and pressing positions can affect the readings. Difference in impact angle, pressure, or positioning on the anvil can introduce inconsistencies. 3. Condition and Type of Rebound Hammer: The internal spring strength, plunger smoothness, and general wear of the hammer components affect its performance. 4. Calibration Frequency and Equipment Age: Over time, repeated use can cause mechanical fatigue or loss of spring tension. Regular calibration at recommended intervals ensures reliable performance and compensates for gradual changes. Sources of Errors During the Anvil Calibration of Rebound Hammer 1. Misalignment During Impact: If the hammer is not held perpendicular to the anvil surface, some of the impact energy is lost laterally, giving an incorrect rebound number. 2. Unstable Anvil Setup: The anvil must be placed on a solid, vibration-free base. Any instability or movement during impact can absorb energy and cause calibration errors. 3. Inconsistent Impact Force or Handling: Variability in how the hammer is pressed against the anvil or triggered can cause fluctuations in results. Calibration requires uniform and controlled impacts. 4. Human Reading or Recording Errors: Misreading the rebound index or incorrectly recording data can result in false calibration outcomes. Double-checking readings can minimize this error. Anvil by Vedantrik technologies Accurate testing of concrete strength begins with properly calibrated instruments. One of the most critical tools in this process is the Rebound Hammer, widely used for non-destructive testing (NDT) of concrete surfaces. To ensure that the rebound hammer provides consistent and reliable readings, regular calibration against a standard reference surface such as the Rebound Hammer Calibration Anvil is essential. Vedantrik Technologies offer high-precision Steel Anvils specifically designed for the calibration of rebound hammers. These anvils are manufactured in accordance with both national and international standards, ensuring dependable performance and long-term durability. As per IS 516, the standard hardness of the calibration anvil must be HRC 66 ± 2, and when tested, the average rebound number obtained on such anvils should fall within 80 ± 2. If the rebound readings fall within this specified range, the hammer is considered properly calibrated and ready for accurate field use. Without proper calibration, rebound hammer readings can be inconsistent or misleading, leading to incorrect assessments of concrete strength and potential structural safety concerns. Using a standardised calibration anvil ensures that every reading taken is backed by precision, reliability, and confidence. By routinely calibrating rebound hammers, engineers maintain accuracy in strength evaluations and avoid potential errors in quality checks. It is an essential practice for laboratories, consultants, and contractors committed to delivering reliable results. For calibration anvils in Mumbai, connect with Vedantrik Technologies and ensure precision in your rebound hammer testing. As a best Anvil Manufacturer in India we have supplied in Mumbai, Pune, Nashik, Aurangabad, Surat, Vadodara, Ahmedabad, Indore, Bhopal, Nagpur, Jaipur, Ludhiana, Ghaziabad, Delhi, Lucknow, Kanpur, Prayagraj, Patna, Ranchi, Dhanbad, Bengaluru, Hyderabad, Chennai, Coimbatore, Madurai, Visakhapatnam, Kolkata, and Srinagar. Also we have supplied a range of products in Dubai, Abu Dhabi, the United Arab Emirates, Oman, Saudi Arabia, Kuwait, and Iran. We also serve clients in Singapore, Indonesia, Thailand, and other international locations.