连续粒径粉体在浆体中的堆积密度

黄新; 朱宝林; 郭晔; 马保国

连续粒径粉体在浆体中的堆积密度

1.
北京航空航天大学土木工程系, 北京 100083
2. 武汉理工大学硅酸盐材料工程教育部重点实验室, 武汉 430070

基金项目: 国家863计划资助项目(2002AA335050)

详细信息

中图分类号: TU 521.4
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出版历程
- 收稿日期: 2005-03-04
- 网络出版日期: 2006-04-30

Packing density of powder in paste with continuous grain size distribution

1.
Dept. of Civil Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2. Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China

摘要

摘要: 采用测定相同流动度时浆体需水量的方法,试验证明了不同粒径分布的矿粉其堆积密度有显著的差异.将浆体中的粉体颗粒及其表面包裹着的一层水膜作为复合颗粒,从而将求浆体中粉体颗粒堆积密度的问题转化为求假想复合颗粒体系的堆积密度问题,在Stovall模型的基础上推导了浆体中连续粒径粉体的堆积密度计算公式;通过试验确定了该公式中的待定参数值,并对公式的适用性进行了验证,结果表明:用该公式可以根据粉体的粒径分布计算它在浆体中的堆积密度.
- 粉体 /
- 浆体 /
- 需水量 /
- 粒径分布 /
- 堆积密度
Abstract: The experimental result of measuring water requirements in paste under the same fluidity showed that there existed noticeable difference in packing density among the slag powders with different particle size distribution. By regarding the powder particles with the water film wrapping them as compounded particles, the packing density of powder particles in actual paste system was transformed into the packing density of compounded particles in imaginary dry-particle system. Based on Stovall model, a calculation method for packing density of powder with continuous particle size distribution in paste was developed. The parameters in the method were fixed and the validity of this method was verified by experiment. It was proved that with this method the packing density of powder could be calculated as long as the size distribution of powder was known.
- powder /
- paste /
- water requirements /
- particle size distribution /
- packing density

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参考文献(1)

[1] Wang Aiqin, Zheng Chengzhi. Zhang Ningsheng. Study of the influence of the particle size distribution on the properties of cement[J]. Cem Concr Res, 1997, 27(5):685~695 [2] 黄新,龙世宗,袁润章. 复合水泥粒径分布对强度影响的初步探讨[J].中国建材科技, 2000,9(5):18~21 Huang Xin, Long Shizong, Yuan Runzhang. A tentative research on the effect of particle size distribution of composite cement on strength[J]. China Build Materials Science & Technol, 2000,9(5):18~21(in Chinese) [3] Rassouly S M K. The packing density of ‘perfect’ binary mixtures [J]. Powder Technology, 1999(103):145~150 [4] Yu A B, Bridgwater J, Burbidge A. On the modelling of the packing of fine particles[J]. Powder Technology,1997(92):185~194 [5] 谢友均,刘宝举,龙广成. 水泥复合胶凝材料体系密实填充性能研究[J].硅酸盐学报,2001,29(6):512~517 Xie Youjun, Liu Baoju, Long Guangcheng. Study on dense packing properties of cementitious materials[J]. Journal of the Chinese Ceramic Society, 2001, 29(6):512~517(in Chinese)

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