Mechanical properties describe how a material reacts to physical forces. They determine whether a material is suitable for a particular use or not and they organize it in the general material property chart. The most common properties are strength, stiffness, elasticity, ductility, hardness, impact resistance, and fracture toughness.
Strength measures the resistance of a material to failure, given by the applied stress (or load per unit area). It is important to understand how strength is defined and how is measured. Stress-strain behaviour is extremely important graphical measure of a material’s mechanical properties. The strength of lightweight concrete is used in structural design criteria and it is usually determined in laboratory.
In order to determine papercrete’s mechanical properties, normal concrete test were conducted. Compressive strength of lightweight concrete is usually determined on the 7, 14, 21 and 28 days. Because drying period is too long I waited until they get their final properties and then test them.
Once specimens were hardened they were subjected to a wide range of tests (compression, bending and creep). Experiments were also made in reinforced specimens to determine which works better with the papercrete mix. Finally the density-strength curve was determined in normal mix specimens and in fibre reinforced ones.