万家寨引黄工程联接段抗冻混凝土配合比的试验研究

Research of Mix Proportion of Frost-resisting Concrete Used in Connection Works of Wanjiazhai YRDP

原材料的好坏直接影响到混凝土的抗冻性能的好坏,一定要选用抗冻性好的水泥及砂石骨料;外加剂和掺合料的合理选用除了能改善混凝土的和易性、降低用水量、降低水胶(灰)比外,还能显著提高混凝土的抗冻性能。抗冻混凝土配合比的设计既要考虑到充分发挥外加剂及掺合料的功效,还要考虑到在满足强度的同时保证其混凝土抗冻性能的要求。

Because the quality of material will affect the frost-resisting characteristics of concrete,it is necessary to select the cement and the sand-gravel aggregate which have good frost-resisting characteristics. The rational usage of admixture and additive not only can improve the concrete workability, decreasing the water use volume and water-cement ratio, but also can improve the frost-resisting characteristics of concrete dramatically.Depending on adjusting the mix proportion of the contents in conctete, the useful effect of admixture and additive can be brought into play and the requirement of the frost-resisting characteristics of concrete can be guaranteed,mean while, the requirement of strength can be met too.