硅酸盐通报2011，Vol.30Issue(1)：7-12,6.
基于显微硬度分析的粉煤灰混凝土碳化性能研究
Carbonation of Fly Ash Concrete Investigated with Microhardness Analysis
摘要
Abstract
This paper presents the carbonation of fly ash concrete investigated with microhardness analysis. After fly ash concrete specimens are exposed in accelerated carbonation environment for 7 d and 28 d, the concrete plate about 50 mm thick is split from the specimen and the cross section is sprayed with phenolphthalein solution to measure carbonation depth. A slice about size of 70 mm × 50 mm × 5 mm is carefully cut from the edge of the specimen and polished with diamond polishing sandpaper.Microhardness values are tested along the carbonation direction of the slice as the step length of 300 μm.The pore structure changes caused by carbonation are explained by mercury intrusion porosimetry analysis. The results show that microhardness analysis is an objective and accurate method to investigate concrete carbonation. It reflects the change discipline of internal microstructure quantitatively in the accelerated carbonation process from a new perspective.关键词
粉煤灰混凝土/碳化/显微硬度分析/微观结构Key words
fly ash concrete/ carbonation/ micro-hardness analysis/ microstructure分类
建筑与水利引用本文复制引用
徐文冰,水中和,马军涛,陈伟..基于显微硬度分析的粉煤灰混凝土碳化性能研究[J].硅酸盐通报,2011,30(1):7-12,6.基金项目
国家重点基础研究发展计划(2009CB623201) （2009CB623201）
国家自然科学基金(50802067) （50802067）
