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▲近年来,日本在海底隧道建造中,用一种以部分高分子材料代替水泥的聚合物砼,防漏效果很好。 ▲美国用钢纤维砼建造机场跑道,这种砼掺入了大量的短轴钢丝,具有很好的耐磨、抗震和防震效果。 ▲俄罗斯采用钢管砼来建造桥梁,它能随反转的各向压力,受力均匀,有极高的抗压强度。 ▲将某些微生物加进砼中,可以使砼的流动性大大增加,为砼输送泵输送提供了方便。 ▲近年生产的金属砼,坚硬无比,抗大气腐蚀能力比陨石还胜一筹。它用金属与砂石熔铸而成,可用于核技术部门做各种放射源的护壁。
▲ In recent years, in the construction of a subsea tunnel in Japan, a polymer concrete made of a partial polymer material instead of cement has a good leakproof effect. ▲ The United States uses steel fiber rafts to build airport runways. This raft incorporates a large number of short-axis steel wires that provide excellent wear, shock and shock resistance. ▲Russia uses steel pipe concrete to build bridges. It can exert uniform pressure with reversed isotropic pressure and has extremely high compressive strength. ▲ The addition of certain microorganisms to the earthworm can greatly increase the mobility of earthworms and facilitate the transport of earthworms. ▲ The metal crucibles produced in recent years are extremely rigid and resistant to atmospheric corrosion. It is cast from metal and sandstone and can be used in the nuclear technology department to protect the walls of various radioactive sources.