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Concrete Compression Testing Machines

Compressive Strength of Concrete and Concrete Compression Machines

Discover our top-of-the-range traditional concrete compression testing machines for all specimens, sizes, and needs. We have everything you need for concrete tests, from 250K Concrete Compression Testing Machines to 500K options. Plus, we even have extensometers and compressometers, along with everything else you need to test concrete efficiently.

With concrete cylinder molds to get you started and machines for performing the test, you have everything you need to test safely. We have concrete test cylinders available in numerous sizes, including 4x8 concrete test cylinders and more, so lets' take a look at the different ways that specific concrete is tested with properties of concrete of machines.

Concrete Compression Testing Concrete

Compression testing machines are essential tools in the construction, used to mechanical test the flexural strength of concrete. These concrete testing machines measure the concrete compressive strength of hardened cylindrical concrete specimens, determining whether the concrete used in construction projects meets the minimum required flexural strength of concrete and applied load rate.

First, you need concrete cylinder molds to shape and hold fresh concrete specimens during the casting process. These create cylindrical samples and facilitate traditional concrete curing. Our complete line of concrete cylinder molds is constructed from the best steel materials and has an unlimited shelf life, whereas plastic concrete cylinder molds are designed for disposable use. Each set comes with multiple molds per case, with the most popular options including 36, 50, or 80 per case.

Then, you add the hardened specimens from the concrete cylinder molds to a compression test machine to determine the concrete psi.

Compression testing machines work by applying a compressive force to concrete until the concrete fails with the appropriate concrete compressive strength ranges (tensile strength of concrete with tensile forces). The failure point determines the compressive strength of the concrete.

Types of Compressive Stress Testing Machines for Compression Test Methods

These machines come in a variety of sizes and capacities, depending on the size of the three specimens being tested and the amount of force required (tensile strength of concrete with tensile forces). Often, you’ll find them in laboratories and in the field on construction sites. They are usually constructed from Teflon load frame and steel load frame, with a lactchable steel guard door.

There are two types of concrete compression testing machines: hydraulic and manual. Hydraulic machines are more common in construction projects because they offer more accurate results and require less effort to operate. They use hydraulic pressure to apply the necessary force to crush the concrete specimen.

Manual machines, on the other hand, require the operator to turn a hand crank to apply the force. As a result, they’re less accurate and more labor intensive.

All of our concrete compression testing machines can be fully equipped with high-accuracy and easy-to-use Pro or Pro-Plus digital controllers. Both exceed industry standards for accuracy, making it easier than ever to produce exceptional concrete. In addition, all of our sturdy concrete compression test machines meet or exceed ASTM C39 and ACI 368 recommendations, as well as international standards and EN 12390, for rigidity in the concrete compression test methods and all other methods.

The Pro Controllers display and the Pro Plus Controllers with the Pro Plus features options provide live load and rate of final load during compression test by the compression test machine, and each are accurate to ±0.5%. Peak load and average load rate are shown at the end of the test, and up to 600 tests can be stored in memory for you to download to a PC or printer.

Not only are results automatically stored, but the Pro-Plus also performs live X-Y plotting of load vs. time. There are also options to send data to a printer for custom printing, plotting, data interpretation, and reporting.

The compression test machine with automatic controllers are a new addition to compressive strength tests (tensile strength of concrete) and other many tests of concrete of various ages. These automatic controllers perform complete test cycles on concrete strength specimens with minimal operator input.

Why Use Concrete Compression Tests with Compression Machines?

Using concrete compression testing products is crucial for ensuring the safety and reliability of construction projects. If the concrete used in your next project is not strong enough, the structure can fail, leading to property damage, injuries, or even loss of life.

Regular testing of concrete with compression machines throughout construction helps to identify these issues early on, allowing for corrective measures before completing the project.

Concrete Compression Testing Machines Overview

Concrete Compression Testing Machines are specialized devices designed to evaluate the compressive strength of concrete (tensile strength of concrete), which is typically measured in pounds per square inch (psi). These machines operate by applying controlled, increasing force to a concrete sample until it fractures, thereby determining its maximum strength. The testing process involves several key components and concepts:

Concrete Higher PSI Tester: This is a central feature of the machine, designed to measure the pressure or force exerted on the concrete sample in psi or higher psi. It provides an accurate assessment of the concrete's compressive strength.

Device to Test Concrete Strength: The entire setup of the compression testing machine serves as a device to affect concrete strength. It usually includes a hydraulic press and a load-bearing platform where the concrete specimen is placed.

Calibration of Cube Testing Machine: Calibration is crucial for ensuring accurate measurements. Cube testing machines, which test the strength of concrete cubes, must be regularly calibrated to maintain precision. This involves adjusting the machine to a standard set of measurements or using known weights to verify accuracy.

Compression Test on UTM Machine: UTM, or Universal Testing Machine, is a versatile device capable of conducting compression tests among other types of mechanical tests. When used for concrete, it applies a compressive load to the material to measure its strength and deformation characteristics.

Compressive Test Fixture: This is a component of the machine that holds the concrete sample in place during testing. It ensures the uniform application of force and accurate measurement of the sample's dimensions and integrity.

Universal Testing Machine: This is a broader category of testing machines that includes the capability for compression testing. UTMs are known for their versatility in performing various types of material strength tests, including tension, compression, and bending tests.

Load Cells: These are critical sensors in a compression testing machine. Load cells measure the amount of force applied to the concrete sample to discover the strength of concrete. Their accuracy is vital for reliable test results.

Load Cell: Singular form of load cells, it refers to the individual sensor used in the testing machine for measuring force.

Proving Ring: This is a device used in the calibration process. A proving ring is a steel ring with known force-deformation characteristics. It is used to calibrate testing machines by correlating the force applied with the deformation observed.

Calibration: This refers to the process of ensuring that the testing machine provides accurate readings. Calibration involves checking and adjusting the equipment with standard measures or known loads to ensure the results are accurate and reliable.

Overall, Concrete Compression Testing Machines are essential in determining the structural integrity and load-bearing capacity of concrete, playing a crucial role in construction and safety. Regular calibration and maintenance of these machines are vital to ensure their accuracy and reliability.

At Certified MTP, we’re committed to providing the best concrete test products in the industry as well as the best concrete compression machines. We understand how vital concrete cylinder molds and compression testing machines are for testing the safety and durability of concrete structures.

Shop our concrete test cylinders and concrete testing machines to improve the quality of your concrete significantly. Or, contact us for more information on our testing products.

For more testing needs, consider the popular Mini-Jaw Crusher

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Overview of Concrete Compression Testing Machine

Concrete compression testing machines play a pivotal role in the construction industry by ensuring the quality and durability of concrete used in various structures. This overview delves into the importance, procedures, and applications of these machines, focusing on maximizing the use of specific keywords related to compressive strength tests.

Importance of Compressive Strength Testing

Compressive strength is a fundamental property of concrete that measures its ability to withstand loads that tend to reduce size. It is a critical indicator of the concrete’s quality and its ability to perform under tensile stress. The compressive strength of concrete is determined using standard test methods, which involve subjecting curing concrete test specimens, typically cylindrical, to loads until failure.

Concrete Compression Testing Machine

A concrete compression testing machine is an apparatus designed to apply compressive force to concrete specimens. This force is applied gradually until the specimen fails, and the maximum load sustained by the specimen is recorded. This maximum load is then used to calculate the compressive strength of the concrete.

Key Components

1. Loading Frame: The structure that holds the test specimen and applies the compressive force.
2. Loading Plates: Plates that distribute the load evenly across the surface of the specimen.
3. Hydraulic System: Provides the force necessary to compress the specimen.
4. Control System: Manages the rate of loading and records the test data.

Testing Procedures

Preparing Test Specimens

Concrete specimens, typically concrete cylinders or cubes, are prepared and cured according to specific standards. The curing process ensures that the specimens achieve the required strength. Field cured specimens and lab cured specimens may be used depending on the specific requirements of the test.

Standard Test Method

The standard test method for determining the compressive strength of concrete involves several key steps:

1. Specimen Preparation: Concrete is poured into molds to create the test specimens. The molds are then removed after a specified period, and the specimens are cured.
2. Surface Preparation: The top surface of the specimens is prepared to ensure it is smooth and level.
3. Placing the Specimen: The specimen is placed in the compression testing machine, aligned correctly between the loading plates.
4. Applying Load: The load is applied gradually at a specified rate until the specimen fails. The loading rate is crucial for obtaining accurate results and is controlled by the machine’s hydraulic system.
5. Recording Data: The maximum load sustained by the specimen is recorded, and the compressive strength is calculated.

Key Factors Affecting Compressive Strength Testing

1. Specimen Size and Shape: The size and shape of the test specimens, such as the length to diameter ratio of cylindrical concrete specimens, can affect the test results.
2. Curing Conditions: The curing conditions, including temperature and moisture, significantly impact the concrete quality.
3. Loading Rate: The rate at which the load is applied must be controlled to ensure reliable results.
4. Surface Preparation: Ensuring the top surface of the specimen is smooth and level is essential for accurate measurements.
5. Concrete Mix: The composition of the concrete mixture, including the type and proportion of coarse aggregate, affects the compressive strength.

Applications and Importance

Concrete compression testing machines are widely used in various industries, including construction, aerospace, automotive, and civil engineering. They provide valuable information about the material's behavior under compressive loads, which is crucial for ensuring the safety and durability of structures.

Quality Control and Compliance

In the construction industry, these machines are essential for quality control. They ensure that the concrete mix used in construction projects meets the specified strength requirements. Acceptance testing involves testing concrete specimens to verify compliance with project specifications and standards such as those from the American Concrete Institute (ACI) and ISO.

Research and Development

In research and development, concrete compression testing machines help engineers and scientists study the properties of new concrete formulations and other building materials. By understanding how different materials behave under compressive loads, improvements can be made to enhance their performance and durability.

Strength Testing Methods

Compressive Strength Test

The compressive strength test is the most common method for assessing the strength of concrete. It involves subjecting cylindrical or cubic concrete specimens to increasing compressive loads until they fail. The compressive strength is then calculated based on the maximum load and the cross-sectional area of the specimen.

Tensile Strength Test

While less common than compressive strength test, tensile strength tests are also important. These tests measure the ability of concrete to withstand tensile stresses, which are stresses that tend to pull the material apart. Understanding both compressive and tensile strengths provides a comprehensive view of the material's performance.

Factors Influencing Test Results

Specimen Preparation

Proper preparation of test specimens is crucial for obtaining reliable results. This includes ensuring the correct mixing of the concrete, proper curing, and preparing the surface of the specimen.

Environmental Conditions

Environmental conditions, such as temperature and humidity, can affect the curing process and, consequently, the compressive strength of the concrete. Controlled conditions in the laboratory help to minimize these variables.

Loading Rate

The rate at which the load is applied during the test must be controlled. An excessively fast or slow loading rate can lead to inaccurate results. Standard test methods specify the appropriate loading rates to ensure consistency and reliability.

Analyzing Test Results

Calculating Compressive Strength

The compressive strength is calculated by dividing the maximum load by the cross-sectional area of the specimen. For cylindrical specimens, the formula is:

\[ \text{Compressive Strength} = \frac{\text{Maximum Load}}{\pi \times (\text{Diameter}/2)^2} \]

Interpreting Results

Interpreting the results involves comparing the measured compressive strength with the specified strength requirements. Variations in the results can indicate issues with the concrete mix, curing process, or testing procedures.

Common Issues and Solutions

Common issues in compressive strength testing include improper curing, incorrect loading rates, and surface defects on the specimens. Addressing these issues involves following standardized procedures and ensuring proper preparation and handling of the test specimens.


Concrete compression testing machines are essential tools in the construction industry, providing critical data on the compressive strength of concrete. By following standardized testing methods and procedures, engineers and construction professionals can ensure that the concrete used in their projects meets the required specifications and standards. These machines not only help in quality control but also play a vital role in research and development, contributing to the advancement of construction materials and techniques.