Papworths Construction Testing Equipment

The reason behind performing the Charpy impact testing is to understand the overall energy that has been absorbed by the material during fracture. Widely called a Charpy V-notch test, the testing process involves striking a given specimen using a weighted pendulum that gets swung at a desirable height. This type of impact testing method is commonly followed in many different industries as it is the best possible way to prepare the right materials.  Widely acknowledged features of  Charpy impact testing : Charpy test showcases if a metal is ductile or brittle. These kinds of classification are highly used with the ferric type of steels, which tend to showcase them as ductile or brittle. Brittle metal, after passing through the required impact test, absorbs only minimum energy. Ductile metal absorbs higher energy levels. A generated fracture surface does provide information co-related to the type of fracture surface created through the process. The appearance is highly noted...

Measuring the coating thickness is an essential practice that contributes todetermining the quality of the product, its process control and pricing. There are many different instruments that can be used in measuring the thickness of the coating. In order to understand the instrument which is being used in measuring the thickness of a coating, it is important to know the working technique of a coating thickness gauge. There are several factors that determine the method that is best while using the coating thickness gauge and these factors include the type of coating, the substrate material, the thickness of the coating, the shape and the size of the coating etc. These factors help in the process of using the coating thickness gauge. For different materials and thickness, different techniques are used. Here we have mentioned the popular techniques. So scroll down and check out: §   Magnetic Film Thickness Gauges: It is used in the non-destructive method of finding the thickn...

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 purpose of the direct shear test is to find soil’s shearing strength. A special type of apparatus is required to evaluate sandy soil’s shearing strength, which will help predict the material’s suitability for building foundations and for supporting retaining walls, slab bridges, sheet piling, and pipes. The test should also be able to identify the value of internal friction’s angle and soil cohesion when designing structures. One of the most advanced direct shear test apparatus is an automatic direct and residual shear testing machine , which comes with a carriage assembly, load hanger, and the integral 10:1, 11:1, and 9:1 lever loading device. A high-end direct shear test apparatus is designed to be floor mounted and motorised. A beam loading device is supplied to strengthen the shear box assembly’s vertical load, and it can handle up to 50kg. The total load on the specimen can reach up to 5kM. The machine is compatible with various round and square shear box assemblies,...

When reinforcing steel corrodes inside concrete, an electro-chemical process occurs and its characteristics can be identified with a half-cell potential (HCP) measurement, also known as a ‘half cell potential test’. HCP measures metallic corrosion to determine the regions of potential corrosion and the risk it can impose on the structure. Date interpretation is nuanced and specific to particular sites, but generally a more negative potential means a risk of corrosion occurring in unsaturated marine exposed concrete. To conduct the test, an electrode is used to form one part of the bimetal cell, while the reinforcing steel within the concrete serves as the other half. Silver/silver chloride in a potassium chloride solution or a simple Copper/Copper Sulphate cell is the ideal reference electrode for use on-site. An electrode that is made of copper/copper sulphate is widely used, too. An advanced half cell potential meter is a great instrument to have for a more reliable way to ...