硅酸盐学报2008，Vol.36Issue(7)：934-938,945,6.
陶粒对混凝土结构及毛细吸水性能的影响
EFFECTS OF AGLITE ON STRUCTURE AND CAPILLARY WATER ABSORPTION PROPERTY OF CONCRETE
摘要
Abstract
The capillary water absorption properties of concrete with different water-cement ratios containing different volume fractions of aglite with different water absorptions were tested. The pore structure of aglite and the interracial zone were observed, and the effects of aglite on concrete permeability were studied. The results show that the aglite with a 1-hour water absorption of 2.4% is advantageous to reduce the capillary water absorption of concrete with higher water-cement ratio (0.49) in early age, whereas the improvement of the interfacial zone is not obvious. The scanning electron microscopy and microhardness test confirm that the interfacial zone is still a weak zone, similar to that around normal weight aggregate. The microstructure of the interfacial zone around aglite with a 1-hour water absorption of 7.1% is dense, with a lower pore volume content and higher microhardness, which can reduce the concrete capillary water absorption greatly, especially in the later hydration period. As for the concrete with higher water-cement ratios, the capillary water absorption decreases gradually with the increase of the content of aglite. The water absorption at 30 min of concrete cured for 90 d with 50% and 100% volume fractions of aglite were 21.3% and 37.8% lower than normal weight concrete at 90 d. But for concrete with a lower water-cement ratio (0.32), an optimum content of aglite should be chosen. Excessive content (>50%) of aglite increases the concrete capillary water absorption.关键词
陶粒/毛细吸水/界面区/孔结构/显微硬度Key words
aglite/ capillary water absorption/ interfacial zone/ pore structure/ microhardness分类
建筑与水利引用本文复制引用
葛勇,孔丽娟,张宝生,袁杰..陶粒对混凝土结构及毛细吸水性能的影响[J].硅酸盐学报,2008,36(7):934-938,945,6.基金项目
交通部西部交通建设(200331882008)资助项目. （200331882008）
