... building structure, water seepage and shock absorption cushioning effect. In the general architectural design of large project, there must leave ... deformation joints which must be placed when concrete cast-in-place, such as canals, tunnels lead exports, dams, canal ... ≤202020Tear Strength, KN/m302525Brittleness Temperature, °C ≤-45-40-40Aging in hot air70°C×168hHardness(Shao A)≤+8+8--Tensile strength ...