Test Fixtures for ASTM C165 Model: G-ASTM-C165

Standard Method for Measuring Compressive Properties of Thermal Insulations. These materials (mineral wool, expanded polystyrene) are highly nonlinear and compliant. The yield is typically defined at 10% deformation. The technical difficulty is Zero Point determination. Because the surface of insulation is often uneven, the first contact between the platen and the specimen is ambiguous. MTO’s software uses a Pre-load Threshold logic to automatically define the 0,0 coordinate of the stress-strain curve. We also recommend our High-Area compression platens (200 x 200 mm) to ensure a statistically representative volume of the material is tested. This standard is a door-opener for the building materials industry, where repeatability in R-value and structural support capacity is a major selling point for manufacturers.