干旱区生态环境知识资源中心(Arid): Effect of internal curing on early-age properties of concrete under simulative natural environment in arid regions

Arid

DOI	10.1016/j.conbuildmat.2022.129697
	Effect of internal curing on early-age properties of concrete under simulative natural environment in arid regions
	Guo, Jinjun; Wang, Kun; Zhang, Peng; Xu, Hongyin
通讯作者	Xu, HY
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
EISSN	1879-0526
出版年	2023
卷号	362
英文摘要	The potential for the use of internal curing in concrete under a natural environment remains unclear. Therefore, this research concerns understanding the effects of three internal curing agents (superabsorbent polymers (SAP), lightweight aggregate (LWA), and perforated cenospheres (PCs)) on the early-age properties of concrete under simulative natural environment in arid regions. Concrete specimens selected underwent a daily temperature cycle from-5 degrees C to 40 degrees C and a constant relative humidity of 35 % in an environment chamber prior to various macro-/micro-structural tests. Compressive strength, splitting tensile strength, autogenous shrinkage, crack resistance characteristic as well as morphology, phase composition and pore-structure were measured. Results show that only internal curing via SAP can increase 28-d compressive strength because large pores in concrete are transformed into small ones by promoting cement hydration. Furtherly, internal curing can reduce both temperature sensitivity and autogenous shrinkage of concrete and improve crack resistance. The analysis reveals that the compressive strength and early-age autogenous shrinkage of internally cured concrete are greatly affected by extra water to cement ratio ((w/c)IC), both decrease as (w/c)IC increases. Moreover, the rate of water release from internal curing agents also affects autogenous shrinkage of concrete and LWA had a higher early-age water release rate than PCs. After comparison, SAP is more suitable for the arid regions with large temperature variation and the best content of it is 0.2-0.3 % of cementitious materials.
英文关键词	Internally cured concrete Dry and large -temperature -variation environ ment Strength Crack resistance Microstructure
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000897763200003
WOS关键词	HIGH-PERFORMANCE CONCRETE ; AUTOGENOUS SHRINKAGE ; STRENGTH DEVELOPMENT ; BEHAVIOR ; WATER ; SAP
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395820
推荐引用方式 GB/T 7714	Guo, Jinjun,Wang, Kun,Zhang, Peng,et al. Effect of internal curing on early-age properties of concrete under simulative natural environment in arid regions[J],2023,362.
APA	Guo, Jinjun,Wang, Kun,Zhang, Peng,&Xu, Hongyin.(2023).Effect of internal curing on early-age properties of concrete under simulative natural environment in arid regions.CONSTRUCTION AND BUILDING MATERIALS,362.
MLA	Guo, Jinjun,et al."Effect of internal curing on early-age properties of concrete under simulative natural environment in arid regions".CONSTRUCTION AND BUILDING MATERIALS 362(2023).