Papworths Construction Testing Equipment

The CBR Test is a measure of the resistance of a material to penetration of standard plunger under controlled moisture conditions and density. The California Division of Highways developed it as a method of evaluating and classifying soil-subgrade and base course materials for flexible pavements. The test might be conducted in the undisturbed or remoulded sample. A cylindrical plunger of 50 mm diameter is used to penetrate a pavement component material at 1.25 mm/minute. Loads of 5 mm and 2.5 mm are recorded. It is expressed as a percentage of standard load value at a respective deformation level to obtain the value of CBR. California Bearing Ratio Test on Subgrade Soil The primary aim of this test is to determine the California Bearing Ratio value of the subgrade soil. Apparatus for CBR Test Any compression machine that can operate at a constant rate of 1.25 mm per minute can be used. It consists of a moulds of 150 mm and 175 mm height offer a collar of about 50 mm leng

The comprehensive strength of the concrete compression test offers an idea about all the characteristics of concrete. By this single test, one can judge whether concreting has been done correctly or not. The compressive strength of concrete for general construction varies from 15 MPa to 30 MPa and higher in industrial and commercial sectors. Compressive strength of concrete depends upon various factors like cement strength, water-cement ratio, quality of concrete material, and quality control at the time of production of concrete, among others. Test for compressive strength is carried out either on a cylinder or cube. Various standard codes recommend a concrete cube or cylinder as the standard specimen for the analysis. How can compressive strength be defined? Compressive strength can be defined as structure or material to carry loads on its surface without any deflection or crack. A material under compression tends to reduce the size when in tension, and the size elongates.

The magnetic extensometer is a system which is used for examining the settlement and heave in foundations, digging and barriers. Settlement occurs at the depth or the position and is identified there. It is there only where the settlement is measured. The soil extensometer incorporates magnetic targets that are placed so that they can move freely outside the access case or inclinometer case which is flush joined. The 3 or 6 Leaf Spider, magnetic settlement plates or magnetic joints can be the targets. The relative position of the magnetic targets is used for measuring the settlement. This is done by using a Reed Switch Probe which helps in identifying the magnets which are lowered down through the central access casing. Features This device helps in the total and the progressive settlements too. The Following are the characteristics of a magnetic extensometer that are used in the task of excavation. Convenient handling As an alternative to the measuring tape, the magne

The branch of civil engineering which covers the section of engineering behaviours of earth materials is known as geotechnical engineering. The equipment used by specialists for this work is geotechnical equipment. It also finds its applications in the mining, military, and petroleum industry. The machines and apparatus of geotechnical nature use rock and soil mechanics to investigate the conditions and materials below the surface of the earth. The capabilities Geotechnical machines have a lot of aptitudes. Here are some of the abilities of geotechnical equipment , •         It can demonstrate the specific gravity of the gravel and soil specimens. •         It can determine the liquid limit of the soil specimen by conducting tests. •         It can find out the quantity and percentage of boulders, sand and gravel content in a specific soil specimen. •         It can measure the limit of plastic content in the soil specimen. •         It can measure the optimum moisture

Before knowing the advantages and disadvantages of a coating thickness gauge, understand what the device does. It is a device that measures the thickness of a dry film. The most critical form of measurement when it comes to coatings industries is the measurement of dry film coating. The measurement readings determine the life expectancy of the layer. Advantages 1.   It has two forms: The coating thickness gauge machines come in two forms, a mechanical one and a digital one. Mechanical ones are perfect for working in high-risk areas like underwater or flammable zones. Digital ones have a design which enables it to provide accurate measurements on any substrate, whether metallic or non-metallic. 2.   Accuracy: With the advancements in science and technology, designers manufacture coating thickness gauges that are very accurate. However, it depends on the level of precision you need in your work. If you are buying a device from a renowned company, then you will get the mos

A coating thickness gauge is also called as a paint meter which is often used for measuring the dry film thickness. Measuring the dry thickness is one of the most difficult processes of measuring in the industry of coating because of its effect on the process of coating, quality, and cost. This device is used for measuring and evaluating a coating’s life expectancy, appearance and functionality of the product and assures compliance with the International Standards. The dry film thickness is measured with the help of two processes, first is the destructive thickness method and the second is the non-destructive thickness method. Under the destructive thickness method, the coating is cut to the basic with the help of a cutter. Under the non-destructive method of coating those techniques of measurements are used which are non-destructive, do not destroy the coating or the basic part and the current thickness measurement methods. The method of measuring the thickness can be done ei