The durability study of high performance concrete in sulfate environment

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	The durability study of high performance concrete in sulfate environment
	Qiao Hongxia 2; Yu Hongfa 2; Zhou Mingru 1; He Zhongmao 3
	2010
会议日期	April 23, 2010 - April 25, 2010
会议地点	Yantai, China
关键词	Additives Aggregates Concrete aggregates Concrete mixing Concrete mixtures Durability Elastic moduli Hydrated lime Hydrates Hydration Portland cement Sodium sulfate Sulfur compounds Composite additives Dry-wet cycle Durability of concretes Dynamic elastic moduli Portland cement concretes Salt resistance Sulfate resistant cements Sulfate solutions
卷号	2
页码	885-888
英文摘要	Aiming at determining the durability of concrete in very salty regions, this study examines the performance of various high performance fine aggregate concretes in a sulfate environment, such as high performance concrete inside a composite additive, and Portland cement concrete and sulfate resistant cement concrete, all of which experienced dry-wet cycles in sodium sulfate solutions. By examining the changes of elastic moduli and analyzing the SEM of the concrete, this paper has found that the salt resistance of sulfate resistant cement concrete is no better than that of Portland cement concrete in the extremely aggressive dry-wet cycle environment but high performance concrete containing a composite additive has better resistance in a sulfate environment. Besides, the composite additive can create the environment for a second hydration to reduce the amount of Ca(OH)2 inside the concrete, and build additional C-S-H gel to reform the microstructure of concrete effectively. Finally, the paper offers some advice for mixing concrete in salt regions.
会议录	Proceedings of the 12th International Conference on Inspection, Appraisal, Repairs and Maintenance of Structures
会议录出版者	CI-Premier Pte Ltd
会议录出版地	150 ORCHARD ROAD #07-14, ORCHARD PLAZA, SINGAPORE, 238841, SINGAPORE
语种	英语
WOS研究方向	Engineering
WOS记录号	WOS:000290459300129
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/117004]
专题	土木工程学院
通讯作者	Qiao Hongxia
作者单位	1.Lanzhou Univ Technol, Lanzhou, Gansu, Peoples R China 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining, Qinghai, Peoples R China 3.Gansu Sci Res Inst Civil Engn, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Qiao Hongxia,Yu Hongfa,Zhou Mingru,et al. The durability study of high performance concrete in sulfate environment[C]. 见:. Yantai, China. April 23, 2010 - April 25, 2010.