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本文确定了C80F350人工砂混凝土配合比的基本参数,测试了其和易性、力学性能及耐久性能,并进行了人工砂混凝土管桩试生产,对桩体进行了抗弯试验,对桩体切块进行了抗压及抗冻试验。结果表明:(1)采用现有机制砂与天然细砂按一定比例混合而成的混合砂可以配制出与天然砂混凝土性能同样优异的C80F350人工砂混凝土;(2)C80F350人工砂混凝土与天然砂混凝土相比具有抗压及劈裂抗拉强度高、抗冻及抗渗性好、氯离子渗透系数低、弹模大等特点;(3)C80F350人工砂混凝土与现有管桩生产工艺相适应,管桩桩体抗弯性能、切块抗压强度及耐久性能均能满足相关要求。
In this paper, the basic parameters of C80F350 artificial sand concrete are determined, and the workability, mechanical properties and durability of the C80F350 artificial sand concrete are tested. The production of artificial sand concrete piles is carried out, the bending test of the pile is carried out, The block was subjected to compression and freeze resistance tests. The results show that: (1) C80F350 artificial sand concrete with the same excellent properties as natural sand concrete can be prepared by mixing the existing sand with natural fine sand according to a certain proportion; (2) C80F350 artificial sand concrete and natural sand Compared with concrete, it has characteristics of high compressive strength and splitting tensile strength, good frost resistance and impermeability, low chloride ion permeability coefficient and large elastic modulus. (3) C80F350 artificial sand concrete is compatible with the existing pipe pile production process , The bending behavior of pipe pile, the compressive strength of dice and durability can meet the relevant requirements.