水泥能否制成弹簧,这在以前一直是一个难以想象的问题。可是两年前,伯查尔(J.D.Birchall)等英国科学家已提出了申请制造“水泥弹簧”的专利,并发表了有关论文。众所周知,水泥和混凝土的致命弱点就是抗拉强度很低(约30～100kg/cm~2),抗拉与抗压强度之比(简称拉压比)只有1/10,所以它们属于脆性材料。脆性材料一般来说都不容易被压坏,但很容易被折断, Whether cement can be made into a spring has been an unimaginable problem in the past. But two years ago, British scientists such as J. D. Birchall had filed a patent application for the manufacture of “cement springs,” and published papers. As we all know, the fatal weakness of cement and concrete is the low tensile strength (about 30 ~ 100kg / cm ~ 2), tensile and compressive strength ratio (referred to as tension ratio) only 1/10, so they are brittle materials. Generally brittle materials are not easily crushed, but it is easy to break,