3种混凝土浇筑工艺的比较研究.PDFVIP

第 29 卷第6 期 武汉理工大学学报 Vol. 29 No.6 2007 年 6 月 JOURNALOF 矶llJHAN UNIVERSI 1Y OF TECHNOLOGY jun.2007 3 种混凝土浇筑工艺的比较研究 沈卫国1 马 威1 都魏星2 孙吉平3 (1武汉理工大学硅酸盐材料工程教育部重点实验室，武汉 430070; 2 孝感市中南路桥有限责任公司，孝感 432000;3. 孝感市宇通公路工程监理咨询有限责任公司，孝感 432000) 摘 要: 采用相同的原料分别以常规工艺、预置集料工艺和抛填集料工艺制备了 3 种 C50 混凝土，对比了不同工艺制 备的混凝土材料组成与技术经济指标。采用抛填集料工艺申IJ 备的混凝土集料体积分数大、水泥和水的用量小，可以提高 混凝土强度，降低混凝土干缩系数，并显著降低其成本与环境负荷。该工艺与常规工艺变化不大，易于推广应用。 关键词: 混凝土浇筑; 抛填集料工艺; 强度; 干缩系数; 环境负荷 中图分类号 TU 528 文献标志码 A 文章编号: 1671-4431 (2007)06-0046-04 Parallel Investigation on Three Kinds of Concrete Placing Process SHEN Wei-guo 1 , MA ，再Tei 1 ，岛生o Wei-xing2 , SUN Ji-ρing3 (1. Key Laboratory for Silicate Materials Science imd Engineering of Ministry of Education , Wuhan University of Technology , Wuhan 430070 , China;2. Xiaogan Zhongnan Road and Bridge Engineering Ltd , Xiaogan 432000 , China; 3. Xiaogan Yutong Highway Management Consulting Company , Xiaogan 432000 , China) Abstract: Three kinds of C50 concrete were prepared with three different concrete placing processes: normal process , pre- placed aggregate and scattering-filling aggregate proc臼s ， material components , volume fraction , technology properties and ma- terial costs of the concretes prepared with those tree kinds of processes were investigated contracting with each other. The scat tenng aggregate proc臼s can prep盯巳 concrete with bigger aggr巳gate volume fraction , and less cement and water content than the ordinary proc巳ss ， which caould improve the strength but reduce dry shrinkage ratio of the concrete , the cost and the environ mental impact of the