干旱区生态环境知识资源中心(Arid): 内养护补偿收缩混凝土的抗裂性能

Arid

	内养护补偿收缩混凝土的抗裂性能
其他题名	Crack Resistance of Internal Curing Shrinkage-Compensating Concrete
	朱长华; 李享涛; 王保江; 谢永江
来源期刊	建筑材料学报
ISSN	1007-9629
出版年	2015
卷号	18 期号:6 页码:1033-
中文摘要	研究了UEA(硫铝酸钙类膨胀剂)和HCSA(硫铝酸钙氧化钙类膨胀剂)的膨胀特征,比选出适宜于配制补偿收缩混凝土的膨胀剂;研究了内养护对补偿收缩混凝土抗压强度、早期变形、干缩落差和抗裂性的影响,并在西北大风干旱地区开展了内养护补偿收缩混凝土的现场应用试验.结果表明:HCSA的膨胀效能高、膨胀速率快、对后期水分补充的依赖程度低,掺量(质量分数)为6%时可满足混凝土补偿收缩的要求;内养护可提高HCSA的膨胀效能,减小补偿收缩混凝土的塑性收缩和干缩落差,提高补偿收缩混凝土的抗裂性;内养护补偿收缩混凝土用于西北大风干旱地区暴露面大的薄壁平板实体结构时具有良好的抗裂性.
英文摘要	The expansive characteristics of UEA(calcium sulphoaluminate expansive agent) and HCSA(calcium sulphoaluminate-calcium oxide expansive agent) were studied, and then the expansive agent suitable for shrinkage-compensating concrete was determined.The influences of internal curing on compressive strength, early deformation, drying shrinkage drop and crack resistance of shrinkage-compensating concrete were investigated in laboratory, and subsequent field application was carried out in northwest high wind arid area. It is indicated from the result that HCSA with higher expansion and less dependence on external water curing at later stage can meet the shrinkage-compensating requirement of concrete as long as its use level(by mass) reaches up to 6%; with internal curing, the effectiveness of HCSA could be improved, and the plastic shrinkage and drying shrinkage drop of shrinkage-compensating concrete could be reduced, and the crack resistance of shrinkage-compensating concrete could be improved; the internal curing shrinkage-compensating concrete applied in thin-plate structure with vast exposed surface in northwest high wind arid area exhibits good crack resistance.
中文关键词	内养护 ; 膨胀剂 ; 补偿收缩 ; 塑性收缩 ; 抗裂性
英文关键词	internal curing expansive agent shrinkage-compensation plastic shrinkage crack resistance
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Construction & Building Technology
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:5597921
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232942
作者单位	朱长华, 中国铁道科学研究院, 北京 100081, 中国.; 李享涛, 中国铁道科学研究院, 北京 100081, 中国.; 王保江, 中国铁道科学研究院, 北京 100081, 中国.; 谢永江, 中国铁道科学研究院, 北京 100081, 中国.
推荐引用方式 GB/T 7714	朱长华,李享涛,王保江,等. 内养护补偿收缩混凝土的抗裂性能[J],2015,18(6):1033-.
APA	朱长华,李享涛,王保江,&谢永江.(2015).内养护补偿收缩混凝土的抗裂性能.建筑材料学报,18(6),1033-.
MLA	朱长华,et al."内养护补偿收缩混凝土的抗裂性能".建筑材料学报 18.6(2015):1033-.