Papworths Construction Testing Equipment

Concrete must be tested for quality assurance. At times, it is conducted for assessing structural conditions in their final form and before performing any repairs on a structure. The compressive strength of concrete is determined as an estimate by correlating mechanical properties like ultrasonic wave velocity and surface hardness with lab-based destructive tests. Concrete strength is measured by a compression test, which will determine the ability of the material to resist loads that may compress it. Compressive strength is determined by crushing a cylindrical specimen of concrete in a compression testing machine.  The results of a compressive strength test can be used to determine if the concrete mixture delivered to the construction site is able to meet the specified strength requirements for the job. Concrete cylinders are produced and cured following the procedures indicated in ASTM C-31, and the specimens are tested according to ASTM C-39. The test results depict the ...

Concrete compression testing is a crucial aspect of the construction process. Concrete is tested to make sure that the material specified and purchased is consistent with what was delivered to the construction site. There are many different testing methods to determine concrete compression, and they typically involve the use of specially designed tools and equipment to make sure that the procedure follows industry standards.  Concrete compression tests are typically conducted in a lab. Cylinder samples are used and operators follow AS1012 to ensure the correct procedure, sampling equipment, and other tools to be used for the test. The same standard specifies the requirements for determining the indirect flexural strength of concrete by splitting, and generic flexural testing.  The concrete compression test is actually the most widely conducted testing method to determine the compressive strength of concrete. Cylinders and cube samples are typically used for the tes...

A concrete slump test measures the consistency of the material in a specific batch to determine the consistency, workability, and texture of the freshly made concrete. In a slump test, consistency determines the ease with which the material can flow. Hence, the test can help indicate the degree of wetness. Testing lets you determine the workability of the concrete, where wetter concrete is more workable compared to a drier mix, although the one with similar consistency can vary in its workability. The test can be used to determine the consistency of different batches of concrete, too.  To conduct a slump test , you need materials like the slump cone, base plate, slump funnel, a tamping rod, a ruler, and a mallet. The simplicity of these devices makes slump testing cost-effective in determining the workability of fresh concrete. In a test, the slump cone must be filled in layers, and each later will be compacted with the rod. The cone is then taken away and the vertical drop...

Concrete corrosion is a type of physicochemical, colloidal, or chemical disintegration and deterioration of solid structures and components and it is usually caused by reactive gases and liquids. It is a defect that can cause widespread damage to assets. Hence, it makes sense to make sure that preventative measures, testing, and coatings are applied to prevent or at least reduce the speed of corrosion. The corrosion of concrete reinforcement usually depends on the porosity and cover thickness of the concrete layer. Likewise, it may depend on environmental conditions, especially when those physical and geometrical properties are unable to meet requirements.  Reinforced concrete is typically designed and constructed with an estimated life span, which is controlled by asset-owners and designed by designers. The structure must be in a state of deterioration to the point that it cannot fulfil its functions any more. To prevent concrete corrosion, steps like controlling the quality...

Measuring surface resistivity is crucial to determine the state of the concrete structure. Surface resistivity is known to be directly related to the chances of corrosion occurring and the rate of corrosion. Studies have shown a direct correlation between chloride diffusion rate and resistivity, too. For this reason, a ResiPod resistivity meter is used to measure concrete resistivity in a non-destructive manner. The ResiPod is a comprehensive four-point Wenner probe device. It is extremely fast, accurate and reliable device for conducting resistivity measurements. High-quality resistivity meters come with a waterproof and robust housing that can be used in the most demanding job environments. Resistivity is among the major factors that become present at the onset of corrosion, which requires a flow of ions between cathodic and anodic sites on the reinforcement in the concrete. Resistivity is the one responsible for controlling the rate of the flow of ions. Hence, it directly con...

The soil often serves as the base of foundations of structures, support for roads, and other crucial infrastructure. For this reason, soil testing is one of the mandatory tests construction companies, and engineering firms conduct to predict the mechanical behaviour of soils. With the proper soil testing equipment, it is easier to determine the behaviour and quality of the soil before you begin building on it. The equipment is designed to be accurate in characterising soil samples on-site or in the laboratory. High-end systems come with tools for collecting samples, classifying soils, conducting mechanical property evaluation, and testing the completed sub base or road base on site. The triaxial shear test system is among the commonly used soil testing equipment. It measures the mechanical properties of soils and other deformable solids, like clay, sand, and granular materials. In this test, the effects of certain applications like excavations, tunnelling, and building constructi...

Using an ultrasonic pulse velocity tester is a good way to check the quality of natural rocks and concrete. The device is designed for conducting an ultrasonic pulse velocity test, which assesses the quality and strength of rock or concrete by measuring the velocity of the ultrasonic pulse as it passes through the material being tested. The tester sends a pulse of the ultrasonic wave through the concrete and measures the time it takes for the pulse to get through the material. The pulse velocity will depend on the elastic properties and density of the material, and these are related to the material's strength and quality. High velocities prove the continuity and good quality of the material, and slower velocities may depict voids and cracks in the concrete. The most basic theory of ultrasonic testing is known as 'time of flight', which pertains to timing the arrival of the ultrasonic pulse from a transducer to another through a material, like concrete. In standard ope...