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保证较高的强度、较好的耐久性的前提下进行超高层的混凝土泵送有很大的难度。本文探究微珠粉煤灰掺量对超高层高强混凝土耐久性和收缩的影响规律。C100混凝土水灰比较低密实度较高,因此其抗氯离子渗透性能、抗碳化性能及抗冻融性能较好,其配合比己实际应用于长沙北辰三角洲A1区酒店、写字楼、商业综合体建安工程,泵送高度理论达到300米,泵送时混凝土的工作性良好,泵送过程顺利,浇注完毕后,混凝土的力学性能和耐久性均达到设计要求。
It is very difficult to pump super high-rise concrete under the premise of ensuring high strength and good durability. In this paper, the influence of microbead fly ash content on the durability and shrinkage of super-high-strength high-strength concrete is investigated. C100 concrete has a relatively low densification degree of concrete water resistance, so its resistance to chloride ion permeability, anti-carbonization and anti-freeze-thaw performance is good, the ratio has been actually applied to Changsha, North Star Delta A1 Hotel, office buildings, commercial complex Engineering, pumping theory to reach a height of 300 meters, pumped concrete work well, the smooth pumping process, pouring finished, the mechanical properties and durability of concrete meet the design requirements.