首页|期刊导航|哈尔滨工业大学学报（英文版）|The grain grading model and prediction of deleterious porosity of cement-based materials
哈尔滨工业大学学报（英文版）2008，Vol.15Issue(2)：266-270,5.
The grain grading model and prediction of deleterious porosity of cement-based materials
The grain grading model and prediction of deleterious porosity of cement-based materials
摘要
Abstract
The calculating model for the packing degree of spherical particles system was modified. The grain grading model of cement-based materials was established and could be applied in the global grading system as well as in the nano-fiber reinforced system. According to the grain grading model, two kinds of mortar were de-signed by using the global grain materials and nano-fiber materials such as fly ash, silica fume and NR powder.In this paper, the densities of two above systems cured for 90d were tested and the relationship of deleterious porosity and the total porosity of hardened mortar was discussed. Research results show that nano-fiber materialsuch as NR powder can increase the density of cement-based materials. The relationship of deleterious porosity and the total porosity of hardened mortar accords with logarithmic curve. The deleterious porosity and the ration-ality of the grading can be roughly predicted through calculating the packing degree by the grain grading model of cement-based materials.关键词
cement paste/ modeling/ packing density/ deleterious porosity/ nano-fiber powderKey words
cement paste/ modeling/ packing density/ deleterious porosity/ nano-fiber powder分类
建筑与水利引用本文复制引用
FENG Qi,LIU Jun-zhe..The grain grading model and prediction of deleterious porosity of cement-based materials[J].哈尔滨工业大学学报（英文版）,2008,15(2):266-270,5.基金项目
Sponsored by the Natural Science Foundation of Ningbo( Grant No. 2007A610061 ). （ Grant No. 2007A610061 ）
