WATERPROOFING AND HEAT-INSULATING MATERIAL

摘要

WATERPROOFING AND HEAT-INSULATING MATERIAL Waterproofing and heat-insulating material consisting of bitumen, comminuted rubber, thermoplasticized coal and asbestos, the components being used in the following proportions (in mass %): bitumen . . . . . . . . . 18 - 53 comminuted rubber. . . . . . 15 - 30 thermoplasticized coal. . . . . 5 - 55 asbestos. . . . . . . . . 11 - 13 The material has improved physico-mechanical properties. Thus, ultimate tensile strength is as high as 28.5 kgf/cm2, flexibility of the material in terms of double bendings is 39. Minimum temperature at which the material is still flexible when tested on a 10 mm diameter rod is -29.degree.C. The material features low water absorption (water absorption rate is 0.03% at 20.degree.C, 24 h). Heat conductivity of the material is 0.125 kcal/m.h.deg., specific heat capacity is 0.337 kcal/kg.deg.