连续粒径水泥颗粒在浆体中堆积密度.pdf

9 4 Vol. 9, No.4 2006 8 JOURNAL OF BUILDING M AT ERIALS Aug. , 2006 : 1007 9629(2006) 06 0447 06 1, 3 1 1 2 2 朱宝林 , 黄 新 , 郭 晔 , 马保国, 朱洪波 ( 1. , 100083; 2. , 430070; 3. , 100029) : 通过流动度试验发现, 粒径分布不同的水泥在 同流动度时其需水量有显著差异, 说明粒径分布不同的水泥其堆积密度不同; 推导了连续粒径粉体在浆体中的堆积密度计 算公式, 并通过试验对该公式进行了验证. : 浆体; 需水量; 连续粒径分布; 堆积密度 :T Q172. 1 : A Packing Density of Cement in Paste with Continuous Grain Size Distribution 1 1 1 2 2 ZH U Bao-l in , H UA N G X in , G UO Ye , M A Bao-g uo , ZH U H ong- bo ( 1.Department of Civil Engineering, Beihang University, Beijing 100083, China; 2.Wuhan University of Technology, Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan 430070, China; 3.Beijing Communications Way star T echnica Co. Lt d., China Academy of T ransportation Sciences, the Ministry of Communications, Beijing 100029, China) Abstract: The experiment show s that there exist noticeable difference in water requirement among cement powder samples with different size distribution at same fluidity degree, that means differ ent size distribution of powder determines different packing density of it. A nd a formula of pack ing density of powder with continuous grain size distribution in paste is proposed. The experi ment proves that with this formula the packing density of powder could be calculated as long as the size distribution of the cement were known. Key words: paste; water requirement; continuous grain size distribution; packing density , [