高抗冻及超抗冻混凝土的开发应用

Discussion on development and application of high antifreeze and super anti-freezing concrete

通过宏观、微观以及孔结构的研究,开发满足快冻300次和快冻600次混凝土即F300的高抗冻混凝土和F600的超抗冻混凝土。研究结果表明,运用525#普通硅酸盐水泥时,在混凝土处于≤0.50的水灰比、50.5%的含气量、气泡间距系数低于300μm或平均气泡间距系数≤150μm情况下,混凝土达到F300的满足高抗冻混凝土的抗冻要求;在混凝土处于≤0.40的水灰比、50.5%的含气量、气泡间距系数低于300μm或平均气泡间距系数≤150μm情况下,混凝土达到F600的满足超抗冻混凝土的抗冻要求。

Through the application of macroscopic,microscopic and pore-structured research,F300 high-freeze-resistant concrete has been developed that meets the fast freezing of 300 times,F600 super-anti-freezing concrete is developed that meets the fast freezeing of 600 times.The research results show that when using the 525#ordinary Portland cement,the concrete reaches the water-cement ratio of≤0.50,the gas content of 50.5%,the bubble spacing coefficient of less than 300 and the average bubble spacing coefficient of≤150μm,the concrete reaches F300,that meets the antifreeze requirements of high antifreeze concrete.In the case of concrete with a water-cement ratio of≤0.40,a gas content of 50.5%,a bubble spacing coefficient of less than 300 or an average bubble spacing coefficient of≤150μm,the concrete reaches F600 and meets the anti-freezing requirements of super-anti-freezing concrete.