Measuring shear strength of loose building materials
Customised engineering example
The shear strength of compacted materials (e.g. soil and sand) can be awkward to test. This is because the shear force applied is perpendicular to the main compressive force, and universal tensile testers only operate in one direction.
Our client is a specialist in waste-disposal and compacts various materials for landfill. He required an affordable solution for occasional testing of shear strength based on many of the requirements of ASTM D3080.
Mecmesin designed a sample container into which the material could be placed and then compacted to a known force, using an AFTI digital force indicator and loadcell. The sample container is then inserted into a Mecmesin twin column tensile tester where one of 3 different profile shear-discs can be used to apply a shear force, which is measured by the tester.