期刊
CEMENT AND CONCRETE RESEARCH
卷 37, 期 7, 页码 1059-1069出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2007.04.011
关键词
air lime; mercury porosimetry; microstructure; carbonation; mortar
The pore structures of carbonated non-hydraulic lime mortars made with a range of different aggregates and concentrations of lime have been determined using mercury intrusion porosimetry (MIP). MIP data have been con-elated with scanning electron microscopy images and other porosity data. During carbonation there is an increase in pore volume in the similar to 0.1 mu m pore diameter range across all mortar types which is attributed to the transformation of portlandite to calcite. Also there is a monotonic increase in the volumes of pores with diameters below 0.03 mu m. A model is proposed for the changes in pore structure caused by carbonation. This attributes the increase in the volume of sub 0.03 mu m pores to the attachment of calcite crystals to the surface of aggregate particles, and in some cases to the surface of portlandite crystals. This phenomenon may explain the continuing presence of portlandite in mortars that, apparently, have fully carbonated. (c) 2007 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据