砂率对混凝土早期开裂性能的影响  

EFFECT OF SAND RATIO ON EARLY CRACKING PERFORMANCE OF CONCRETE

作　　者：石新波 SHI Xinbo(Heilongjiang Province Second Construction Engineering Co., Ltd., Harbin 150080, China)

机构地区：[1]黑龙江省二建建筑工程有限责任公司,哈尔滨150080

出　　处：《低温建筑技术》2019年第2期14-16,共3页Low Temperature Architecture Technology

摘　　要：文中研究了砂率对混凝土早期开裂性能的影响,研究结果表明:随砂率的增大,初裂前平均每小时的质量损失和24h龄期试验结束时的总质量损失、混凝土初始开裂时间、平均裂缝面积和单位面积上的总开裂面积均先减小后增大;本研究条件下,当砂率为43%时,混凝土抗裂性最佳。In this paper, the effect of sand ratio on the early cracking performance of concrete is studied. The results show that with the increase of sand content, the average hourly mass loss before the initial cracking ,the total mass loss at the end of the 24h age test, the initial cracking time of the concrete, the average crack area and total cracking area per unit area decreased first and then increased. Under the conditions of this study, concrete has the best crack resistance when the content of the sand is 43%.

关 键 词：混凝土 砂率 早期开裂 

分 类 号：TU528.1[建筑科学—建筑技术科学]