细骨料对混凝土抗折强度的影响  

EFFECT OF FINE AGGREGATE ON FLEXURAL STRENGTH OF CONCRETE

作　　者：黄爱菊 吕友金 陈亮 纪坤 HUANG Ai-ju;LYU You-jin;CHEN Liang;JI Kun(Advanced Construction Materials Co.,Ltd.,100015,Beijing,China)

机构地区：[1]北京建工新型建材有限责任公司,北京100015

出　　处：《建筑技术》2022年第10期1309-1311,共3页Architecture Technology

摘　　要：混凝土的质量很大程度上取决于原材料的品质,所以如何因地制宜合理选择原材料的性能指标是混凝土发展的必然趋势。通过研究细骨料压碎值指标对混凝土抗折强度的影响,使混凝土抗压和抗折各项性能指标满足设计要求。试验结果表明混合砂的压碎值指标对混凝土的抗折强度随龄期的增长而增大,随抗压强度的增加而增大。严格控制砂进场质量的同时,选择压碎值指标小的混合砂有利于提高混凝土的抗压强度和抗折强度,降低混凝土原材料成本。The quality of concrete largely depends on the quality of raw materials, so how to reasonably select the performance index of raw materials according to local conditions is the inevitable trend of concrete development. This paper mainly studies the influence of fine aggregate crushing index value on the flexural strength of concrete, so that the compressive and flexural performance indexes of concrete meet the design requirements. The test results show that the crushing value of mixed sand on the flexural strength of concrete increases with the increase of age and compressive strength. Strictly controlling the quality of sand and selecting the mixed sand with the best crushing index value are conducive to improving the compressive strength and flexural strength of concrete and reducing the cost of concrete raw materials.

关 键 词：混凝土路面 抗折强度 细骨料 压碎值指标 

分 类 号：TU74[建筑科学—建筑技术科学]