Preparation and Performance Study of C50 Prestressed Concrete in Plateau Mountain Climate
李翔 LI Xiang；党飞 DANG Fei；张亚峰 ZHANG Ya-feng
（云南建投绿色高性能混凝土股份有限公司，昆明 650000）
（Yunnan Jiantou Green High Performance Concrete Co.，Ltd.，Kunming 650000，China）
摘要：论文研究了河砂、水洗机制砂和普通机制砂对T梁C50预应力混凝土工作性能、力学性能的影响规律，砂率对混凝土性能的影响规律，以及水洗机制砂搭配粉煤灰或矿渣粉对混凝土性能影响的优劣，最后分析了水洗机制砂石粉含量对C50预应力混凝土抗开裂和抗水渗性能的影响规律。通过研究表明：用水洗机制砂配制C50预应力混凝土，砂率在40%时，混凝土的工作性能在河砂混凝土与普通机制砂混凝土之间，力学性能最优，使用粉煤灰的效果优于矿渣粉，且混凝土的抗开裂和抗水渗性能在水洗机制砂石粉含量为7%时最优。
Abstract: This paper studies the influence law of river sand, water-washed machine-made sand and ordinary machine-made sand on the working performance and mechanical properties of T-beam C50 prestressed concrete, the influence law of sand ratio on concrete performance, and the combination of water-washed machine-made sand with fly ash or slag. Finally, the influence law of the content of water-washing machine-made sand and gravel powder on the anti-cracking and anti-water seepage properties of C50 prestressed concrete was analyzed. The research shows that when the C50 prestressed concrete is prepared by washing machine-made sand, when the sand ratio is 40%, the working performance of the concrete is between the river sand concrete and the ordinary machine-made sand concrete, and the mechanical properties are the best, and the effect of using fly ash is better than slag powder, and the anti-cracking and anti-water seepage properties of concrete are optimal when the content of water-washed machine-made sand and gravel powder is 7%.
关键词：水洗机制砂；预应力混凝土；石粉；早期开裂
Key words: washing machine-made sand；prestressed concrete；stone powder；early cracking
中图分类号：TU528.571 文献标识码：A 文章编号：1006-4311（2022）18-141-03
DOI:10.3969/j.issn.1006-4311.2022.18.044.
文章出处：李翔,党飞,张亚峰. 高原山地气候下C50预应力混凝土的配制和性能研究[J]. 价值工程,2022,41(18):141-143.
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