Product description

CBR Testing App.





The California Ratio (CBR) is a test for measuring the strength of the primer and sub-base of a highway, as well as soil soils through a penetration test. It is primarily intended for the determination of cohesive materials with a particle size of less than 19 mm. CBR testing machines are used for faster and more reliable testing in obtaining accurate results. The California bearings ratio calculator was developed in the 1930s by the California Department of Highways, and since then it has been adopted by other states and countries around the world. A standard CBR test requires applying a load to a small through-hole piston at a speed of 1.3 mm per minute.



The full range to be recorded is from 0.64 mm to 7.62 mm. The CBR testing machines are used by standard test methods, such as ASTM D 1883 (bearing ratio to laboratory compacted soils) and AASHTO T 193 (bearing ratio of California). The initial CBR test was developed and developed to measure the load-bearing capacity of the soil for road construction, but it can be used to measure the bearing capacity of soils under paved runways and unimproved runways.



A high CBR rating corresponds to a hard surface. For example, on farmed land can have a CBR of three, wet clay or sod can get 4.75, and wet sand can get 10. High-quality crushed rocks usually receive a CBR exceeding 80. CBR machines are manufactured in different types to meet the requirements of laboratory and field tests. Laboratory machines usually come with a dial and a load ring or a digital sensor to measure the stroke and force of the piston. They must have a power of 50 kN, and they must be capable of performing two speeds, which are 1 mm / min and 12.27 mm / min.



Specific tests can be conducted in the laboratory or the workplace. For laboratory tests, actual samples are collected and tested using specially designed equipment, such as compression testing machines. The site testing typically includes a drop test on the delivered concrete and a spot test in place of the concrete compression test cylinders. You can use the equipment to test specific versions of online from reliable suppliers, but there are certain things that you should consider before and during the use of any machine:



All test systems must support and comply with Australian standards. To ensure compliance with the procedure appropriate to the procedure recommended in AS1012, it is necessary to perform concrete testing equipment. The same standard defines the correct equipment and equipment for sampling, as well as other tests that can determine the strength of concrete, for example, flexural testing and bending strength during splitting.



The equipment must comply with safety and industrial standards. Make sure that the compression machine complies with the requirements of the CE norms for the health and safety of operators. Similarly, its technical properties must comply with the standards EN 12390-4. Thus, you can be sure that it applies to early tests without compressive strength, compression test, unconfigured splitting and bending tests and unconfigured basic tests. The concrete testing equipment must also comply with Australian standards of precision.



Machine function - Automatic compression machines connected to the secondary bending frame are ideal for determining the tensile strength, bending strength and strength of concrete. Additional accessories can be installed on some machines for special tests, such as separation and bending tests, as well as cement compression tests.



Appropriate safety equipment. High-quality concrete pumps are equipped with safety elements such as the piston stroke limit switch, maximum pressure valves preventing overload, emergency stop button, maximum software load and maximum load on plexiglass. Nevertheless, for operators, it still makes sense to wear protective gear and equipment, such as goggles, gloves, and helmet, in the event of rupture of individual parts of concrete a