[1]杨文武,钱觉时,范英儒.混凝土早期收缩性能试验研究[J].深圳大学学报理工版,2009,26(1):81-85.
 YANG Wen-wu,QIAN Jue-shi,and FAN Ying-ru.Experimental research on early age shrinkage of concrete by eddy current method[J].Journal of Shenzhen University Science and Engineering,2009,26(1):81-85.
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混凝土早期收缩性能试验研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第26卷
期数:
2009年1期
页码:
81-85
栏目:
土木建筑工程
出版日期:
2009-01-30

文章信息/Info

Title:
Experimental research on early age shrinkage of concrete by eddy current method
文章编号:
1000-2618(2009)01-0081-05
作者:
杨文武12钱觉时1范英儒1
1)重庆大学材料科学与工程学院,重庆400045
2)大连民族学院土木建筑工程学院,大连 116600
Author(s):
YANG Wen-wu12 QIAN Jue-shi1and FAN Ying-ru1
1)College of Materials Science and Engineering,Chongqing University,Chongqing 400044,P.R.China
2)College of Civil Engineering and Architecture,Dalian Nationalities University,Dalian 116600,P.R.China
关键词:
混凝土收缩电涡流早期引气剂
Keywords:
concreteshrinkageeddy currentearly ageair-entraining admixture
分类号:
TU 528.01
文献标志码:
A
摘要:
运用电涡流方法测量混凝土早期收缩,研究了水胶比、引气剂和矿物掺合料等因素对混凝土早期收缩性能的影响.结果表明,水胶比为0.45的混凝土3 d收缩率可达到78×10-6,复掺硅灰矿渣和引气剂时,混凝土3 d收缩率达到113×10-6;随引气剂掺量增大,混凝土早期收缩增加,但在正常掺量范围内引气剂的影响较小;混凝土成型后400~1 500 min为水泥水化放热高峰,其早期收缩曲线出现膨胀或收缩减缓现象.
Abstract:
To understand early age shrinkage of concrete in order to get high performance concrete,an eddy current method was used to measure the early age shrinkage of concrete with different water-binder ratios and mineral admixtures such as fly ash,slag and silica fume and air-entraining admixture.The results show that the shrinkage of concrete with water-binder ratio of 0.45 reached 78×10-6 and that of concrete incorporating slag,silica fume and air-entraining admixture reached 113×10-6 in 3 days. Addition of air-entraining admixture increased slightly the shrinkage of concrete.The expansion segment between 400 min and 1500 min after casting in the shrinkage curve of concrete may result from a relatively large amount of hydration heat produced.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2008-05-21;修回日期:2008-10-30
基金项目:国家自然科学基金资助项目(50572127)
作者简介:杨文武(1964-),男(汉族),辽宁省大连市人,重庆大学副教授、博士.E-mail:uwenyang_2002@163.com
通讯作者:钟觉时(1962-),男(汉族),重庆大学教授、博士生导师.E-mail:qianjueshi@163.com
更新日期/Last Update: 2009-02-17