[1]陈波,张亚梅,郭丽萍.大掺量粉煤灰混凝土干燥收缩性能[J].东南大学学报(自然科学版),2007,37(2):334-338.[doi:10.3969/j.issn.1001-0505.2007.02.030]
 Chen Bo,Zhang Yamei,Guo Liping.Investigation of drying shrinkage of high volume fly ash concrete[J].Journal of Southeast University (Natural Science Edition),2007,37(2):334-338.[doi:10.3969/j.issn.1001-0505.2007.02.030]
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大掺量粉煤灰混凝土干燥收缩性能()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第2期
页码:
334-338
栏目:
材料科学与工程
出版日期:
2007-03-20

文章信息/Info

Title:
Investigation of drying shrinkage of high volume fly ash concrete
作者:
陈波12 张亚梅1 郭丽萍1
1 东南大学材料科学与工程学院, 南京 211189; 2 南京水利科学研究院, 南京 210029
Author(s):
Chen Bo12 Zhang Yamei1 Guo Liping1
1 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2 Nanjing Hydraulic Research Institute, Nanjing 210029, China
关键词:
粉煤灰混凝土 干燥收缩 预测 收缩公式
Keywords:
fly ash concrete drying shrinkage predict shrinkage formula
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2007.02.030
摘要:
为了研究粉煤灰对混凝土收缩性能的影响并有效预测粉煤灰混凝土收缩发展的规律,对采用不同等级粉煤灰,且掺量分别为35%、40%、45%的粉煤灰混凝土的干燥收缩性能进行了研究,测试了各试件7~120 d的收缩值.结果表明:大掺量粉煤灰对混凝土的收缩有较好的抑制作用,且对后期收缩的抑制更为显著; Ⅰ级粉煤灰对混凝土收缩的抑制效果明显优于Ⅱ级粉煤灰.对收缩的时程曲线进行分析,发现其呈复合指数关系,并给出了考虑粉煤灰掺量影响的混凝土干燥收缩预测公式.
Abstract:
In order to investigate the influence of fly ash on shrinkage of concrete and to effectively predict the shrinkage law of fly ash concrete, a series of experiments were carried out to evaluate the compressive strength and particularly the shrinkage properties of concrete containing high volume of fly ash. The Portland cement in concrete specimens were replaced partially by ClassⅠor Class Ⅱ fly ash with the replacement percentage of 35%, 40% and 45% in mass of total cementitious materials. The shrinkage of the specimens from hydration ages of 7 to 120 days were recorded. The results show that high volume fly ash markedly reduces the drying shrinkage of concrete, especially at the later ages. The effect of ClassⅠfly ash on reducing concrete shrinkage is superior to Class Ⅱ. By analysing the shrinkage vs time curves, a compound exponential formula is presented to predict the shrinkage of fly ash concrete. The fly ash replacement percentage is regarded as a parameter in the formula.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 江苏省重大工程资助项目(STDQ-04HT20SY-010).
作者简介: 陈波(1978—),男,硕士; 张亚梅(联系人),女,教授,ymzhang@seu.edu.cn.
更新日期/Last Update: 2007-03-20