[1]严捍东.高水胶比粉煤灰砂浆抗碳化性能机理[J].华侨大学学报(自然科学版),2001,22(1):52-56.[doi:10.3969/j.issn.1000-5013.2001.01.012]
　Yan Hongdong.Performance and Mechanism of the Carbonation Resistance of Flyash Cement Mortar with a Higher Water-Binder Ratio[J].Journal of Huaqiao University(Natural Science),2001,22(1):52-56.[doi:10.3969/j.issn.1000-5013.2001.01.012]
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高水胶比粉煤灰砂浆抗碳化性能机理()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第22卷
期数:
2001年第1期
页码:
52-56
栏目:
出版日期:
2001-01-20

文章信息/Info

Title:
Performance and Mechanism of the Carbonation Resistance of Flyash Cement Mortar with a Higher Water-Binder Ratio
文章编号:
1000-5013(2001)01-0052-05
作者:
严捍东
华侨大学土木工程系, 泉州362011
Author(s):
Yan Hongdong
Dept. of Civil Eng., Huaqiao Univ., 362011, Quanzhou
关键词:
粉煤灰;  碳化;  CH;  微观结构;  孔结构
Keywords:
flyash;  carbonation;  CH;  micro structure;  pore structure
分类号:
TU528
DOI:
10.3969/j.issn.1000-5013.2001.01.012
摘要:
用人工加速法测定粉煤灰的质量分数分别为 0,0 .2 0,0 .36和 0 .4 5,水胶比为 0 .50时的水泥砂浆碳化深度 .砂浆的碳化深度随碳化龄期的延长而增加,且粉煤灰的质量分数越大,碳化深度增加的幅度越高 .通过 XRD,TG- DTA,SEM和压汞法定性定量测定相应浆体碳化前 (标准养护 2 8d)的 CH含量、微观结构特征和孔结构参数 .分析表明,影响粉煤灰水泥砂浆碳化深度的主要因素是浆体碱度的降低,但碳化速率还受浆体孔结构特征的影响
Abstract:
The Carbonation depth of flyash cement mortar with a water binder ratio of 0.50 and a flyash addition of 0~0.45 was measured by the method of artificial acceleration. The CH content, the characteristic of microstructure and the parameters of pore structure showing by these mortar before carbonation and pass through standard curing of 28 days were determined qualitatively and quantitatively by XRD, TG DTA, SEM and mercury intrusion method. As indicated by analyses, the carbonation depth increases with the prolonging of carbonation time; and the more the flyash addition, the higher the increase of carbonation depth; the carbonation depth of flyash cement mortar is chiefly influenced by the lowering of the alkalinity of mortar, but the carbonation rate is also influenced by the characteristics of pore structure.

参考文献/References:

[1] 黄士元. 混凝土耐久性的设计要点 [J]. 混凝土, 1995(3):5-8.
[2] 吴秋冬. 粉煤灰水泥砂浆的碱度、孔结结构和碳化速度的关系 [D]. 南京工学院, 1984.41-52.
[3] 蒋林华. 高掺量粉煤灰(HVFA)混凝土的水化、微结构和机理研究 [D]. 南京:河海大学, 1998.108-116.
[4] 谦慧珍. 建筑材料物相研究基础 [M]. 北京:清华大学出版社, 1997.82-87.

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2014-03-23