王 冠1,李 炜1,葛文杰1,2,陈玉彬2,3,孙 浩1,陈博洋1,陈亦文1,王碧涛1
王冠,李炜,葛文杰,等.不同因素对超高性能混凝土工作性及力学性能的影响[J].混凝土与水泥制品,2021(12):50-54.
WANG G,LI W,GE W J,et al.Influence of Different Factors on the Workability and Mechanical Properties of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2021(12):50-54.
不同因素对超高性能混凝土工作性及力学性能的影响
王 冠1,李 炜1,葛文杰1,2,陈玉彬2,3,孙 浩1,陈博洋1,陈亦文1,王碧涛1
王冠,李炜,葛文杰,等.不同因素对超高性能混凝土工作性及力学性能的影响[J].混凝土与水泥制品,2021(12):50-54.
WANG G,LI W,GE W J,et al.Influence of Different Factors on the Workability and Mechanical Properties of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2021(12):50-54.
摘 要:研究了水胶比和矿物掺合料掺量对超高性能混凝土(UHPC)工作性的影响,分析了砂种类对UHPC力学性能的影响。结果表明:增大水胶比、矿渣粉掺量、粉煤灰掺量均可改善UHPC的工作性,而增大硅灰掺量会降低UHPC的工作性;掺入1%的钢纤维可显著提高UHPC的力学性能;海砂、江砂取代石英砂会使UHPC的抗压强度和抗折强度均有不同程度的降低,机制砂取代石英砂会使UHPC的抗压强度增加、抗折强度降低。
Abstract: The influence of water binder ratio and mineral admixtures content on the working performance of ultra-high performance concrete(UHPC) was studied, and the influence of sand type on the mechanical properties of UHPC was analyzed. The results show that increasing the water binder ratio, slag powder content and fly ash content can improve the working performance of UHPC, but increasing silica fume content can reduce the working performance of UHPC. Adding 1% steel fiber can significantly improve the mechanical properties of UHPC. Replacing quartz sand with sea sand and river sand can reduce the compressive strength and flexural strength of UHPC to varying degrees. Replacing quartz sand with machine-made sand can increase the compressive strength and reduce the flexural strength of UHPC.
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