干旱区生态环境知识资源中心(Arid): Experimental study on microstructure evolution of aeolian sand concrete under the coupling freeze-thaw cycles and carbonation

Arid

DOI	10.1080/19648189.2019.1707712
	Experimental study on microstructure evolution of aeolian sand concrete under the coupling freeze-thaw cycles and carbonation
	Zou, Yuxiao 1,2; Shen, Xiangdong 2; Zuo, Xiaobao 1; Xue, Huijun 2; Li, Genfeng 2
通讯作者	Shen, Xiangdong
来源期刊	EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
ISSN	1964-8189
EISSN	2116-7214
出版年	2020-01
英文摘要	In order to study the influence of aeolian sand (AS), which is widely distributed in desert and sandy land areas, on the durability of concrete subjected environmental attack, some experiments of AS concrete at different conditions of freeze-thaw cycle and carbonation have been performed, while some microscopic tests, such as nuclear magnetic resonance (NMR), field emission scanning electron microscopy (SEM) and X-ray diffraction (XRD), were used to analyse the microstructure evolution of AS concrete. Results showed that, both freeze-thaw cycles and carbonisation have basically no influence on the number of pores with a radius of about 0.020 mu m in AS concrete, which is the upper limit of gel pore size, but they can change the pore structure (porosity, pore size distribution) and relative dynamic elastic modulus. With increasing in the ratio of gel pore to harmful pore, there occur an increase in the relative dynamic elastic modulus and a decrease in the porosity of AS concrete, but the freeze-thaw cycle has more obvious influence on the relative dynamic elastic modulus and porosity than carbonation. AS can improve the freeze-thaw cycle and carbonisation resistance of concrete, and the AS concrete with 40% AS replacement has a more compact pore structure than ordinary concrete.
英文关键词	Aeolian sand concrete freeze-thaw cycles carbonisation pore structures
类型	Article ; Early Access
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000506480100001
WOS关键词	CEMENTITIOUS MATERIALS ; AGGREGATE ; DAMAGE ; DURABILITY ; STRENGTH ; PASTES
WOS类目	Engineering, Civil ; Engineering, Geological
WOS研究方向	Engineering
EI主题词	2020-01-08
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312421
作者单位	1.Nanjing Univ Sci & Technol, Sch Sci, Nanjing, Jiangsu, Peoples R China; 2.Inner Mongolia Agr Univ, Water Conservancy & Civil Engn Coll, Hohhot, Peoples R China
推荐引用方式 GB/T 7714	Zou, Yuxiao,Shen, Xiangdong,Zuo, Xiaobao,et al. Experimental study on microstructure evolution of aeolian sand concrete under the coupling freeze-thaw cycles and carbonation[J],2020.
APA	Zou, Yuxiao,Shen, Xiangdong,Zuo, Xiaobao,Xue, Huijun,&Li, Genfeng.(2020).Experimental study on microstructure evolution of aeolian sand concrete under the coupling freeze-thaw cycles and carbonation.EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING.
MLA	Zou, Yuxiao,et al."Experimental study on microstructure evolution of aeolian sand concrete under the coupling freeze-thaw cycles and carbonation".EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING (2020).