Strength and micro-mechanism of MK-blended alkaline cement treated high plasticity clay

doi:10.1016/j.conbuildmat.2019.117567

	Strength and micro-mechanism of MK-blended alkaline cement treated high plasticity clay
	Guo, Qian 4; Wei, Mingli 3; Wu, Haoliang 2; Gu, Yizhong 1
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2020-03-10
卷号	236 页码:10
关键词	High plasticity clay Metakaolin MK-blended alkaline cement Unconfined compressive strength Micro-mechanism
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2019.117567
英文摘要	This paper focuses on the strength behavior and micro-mechanisms of treated high plasticity clay-mixtures with Metakaolin- (MK-) blended alkaline cement. The MK-blended alkaline cement was prepared by the alkaline activation of Ordinary Portland Cement (OPC) and MK blends, while the MK-based geopolymer and MK-blended cement were also prepared for comparison purpose. The results show that the unconfined compressive strength (UCS) of the clay treated by MK-blended alkaline cement increases with MK replacement at ranges of 30%. Meanwhile, the pore structure was significantly improved in terms of large pores transferring to the smaller size. The increase of MK replacement from 10% to 20% leads to the increase of UCS of the MK-blended alkaline cement treated clay mixture (L/S = 53.8%, 3.2 M) by 21.8%, and increase of pores ranging from 0.01 to 0.1 mu m by 47.5% along with the decrease of pores ranging from 0.1 to 1 gm by 28.1%. This attributes to the notable bonding and filling effect by the coexistence of cementitious gels such as (N,C)-A-S-H and C-A-S-H gels, which differ to the hydration products from traditional OPC hydration. More significantly, the treated clay mixture with 60% MK replacement has the potential to reduce large portion of OPC, due to its appreciable strength of approximately 31.0% increase over the OPC treated clay-mixture. (C) 2019 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[41702349] ; six talent peaks project in Jiangsu Province, P. R. China[JNHB-170]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000514758800051
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23637]
专题	中科院武汉岩土力学所
通讯作者	Guo, Qian
作者单位	1.Southeast Univ, Sch Civil Engn, Nanjing 210096, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Beijing, Peoples R China 4.Southeast Univ, Inst Geotech Engn, Jiangsu Key Lab Urban Underground Engn & Environm, Nanjing 210096, Peoples R China
推荐引用方式 GB/T 7714	Guo, Qian,Wei, Mingli,Wu, Haoliang,et al. Strength and micro-mechanism of MK-blended alkaline cement treated high plasticity clay[J]. CONSTRUCTION AND BUILDING MATERIALS,2020,236:10.
APA	Guo, Qian,Wei, Mingli,Wu, Haoliang,&Gu, Yizhong.(2020).Strength and micro-mechanism of MK-blended alkaline cement treated high plasticity clay.CONSTRUCTION AND BUILDING MATERIALS,236,10.
MLA	Guo, Qian,et al."Strength and micro-mechanism of MK-blended alkaline cement treated high plasticity clay".CONSTRUCTION AND BUILDING MATERIALS 236(2020):10.