PHYSICAL PROPERTIES
Physical properties of URETEK relative to increased density
- Compressive strength
- Shear strength
- Flexural strength
- Tensile strength
Within certain limits the URETEK polymer demonstrates elastic characteristics. Hooke’s Law indicates that compression is proportional to the applied forces and will not exceed more than 2%-10% in deviation.
Only when force exceeds the elastic limit is the internal cellular structure permanently modified and will not recover its initial form. The elastic limit depends on the density of the material.
The four diagrams on the right indicate the effect of density on its resistance to forces of compression, shear, bending and tension.
Compressive Strength
The URETEK polymer is primarily used to consolidate ground and to re-level settled structures. It is clear that, from a practical point of view, the most important property is compressive strength. Diagram 6.1a relates the density of the material to its compressive strength. The usual surface density of the URETEK material, which is about 70kg/m3 when injected beneath flooring, can reach 300 kg/m3 in deep injection levels.The elastic limit varies between 10 and 65 kg/cm2.
Shear Strength
The URETEK polymer has considerable shear strength, which for a standard thickness to the ASTM standard, varies from 5 and 30 kg/cm2 according to the density of the material.
