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通常无筋混凝土和钢筋混凝土的抗压强度在150～400kgf/cm~2,予应力混凝土在350～5~0kgf/cm~2,而高强度混凝土是指抗压强度在600～800kgf/cm~2。在现阶段混凝土强度已能达到500～600kgf/cm~2,并且使其强度达到1000kgf/cm~2也已成为可能。混凝土高强度化的机理在于减少混凝土的水灰比,从而减少水泥熟料中的毛细孔隙和混凝土中的空隙,并使之充分密实。实现混凝土高强度化的主要方法有:(1)降低水灰比减少水泥熟料的孔隙。使用高性能减水剂可将砼中水泥粒子尽可能分散,显著提高其流动性,使素硷的单位用水量降低
Generally, the compressive strength of non-reinforced concrete and reinforced concrete is 150 ~ 400kgf / cm ~ 2, the prestressed concrete is 350 ~ 5 ~ 0kgf / cm ~ 2, while the high strength concrete refers to the compressive strength of 600 ~ 800kgf / cm ~ 2. At this stage of the concrete strength has been able to reach 500 ~ 600kgf / cm ~ 2, and to achieve the strength of 1000kgf / cm ~ 2 has also become possible. The mechanism of high strength concrete is to reduce the water-cement ratio of concrete, thereby reducing the capillary porosity of cement clinker and concrete voids, and make it fully dense. The main methods to achieve high strength concrete are: (1) reduce the water cement ratio to reduce the porosity of cement clinker. The use of high-performance water reducer concrete particles can be dispersed as much as possible to significantly increase its liquidity, the unit of water to reduce the pH