Comparative study on mechanical properties and microstructure development of ultra-high performance concrete incorporating phosphorous slag under different curing regimes

被引：16

作者：

Chen, Gaoping ^{[1
]}

Huang, Yuepeng ^{[1
]}

Yang, Rui ^{[1
]}

Yu, Rui ^{[2
]}

Xiao, Rengui ^{[1
,3
]}

Wang, Zhiyang ^{[1
]}

Ke, Xiang ^{[1
]}

Xie, Guiming ^{[1
]}

Cheng, Jinke ^{[1
]}

Bao, Ming ^{[4
]}

机构：

[1] Guizhou Univ, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China

[2] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

[3] Guizhou Univ, Collaborat Innovat Ctr Guizhou Prov Efficient Util, Guiyang 550025, Guizhou, Peoples R China

[4] China Construction Ready Mixed Concrete Co Ltd, Wuhan 430000, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 392卷

关键词：

Ultra-High Performance Concrete; Cuing regimes; Microstructure; Phosphorous slag; REACTIVE POWDER CONCRETE; C-S-H; HIGH-STRENGTH CONCRETE; COMPRESSIVE STRENGTH; HYDRATION PRODUCTS; CEMENT PASTE; TEMPERATURE; ETTRINGITE; METAKAOLIN; ADMIXTURES;

D O I：

10.1016/j.conbuildmat.2023.131963

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, the mechanical property and microstructure development of UHPC (ultra-high performance concrete) incorporating different PS (phosphorous slag) content is studied under five curing regimes. The microstructure of UHPC is also discussed by TG, XRD, MIP, the SEM-EDS and Si-29 NMR. The result indicated that the high strength of UHPC containing PS is obtained by heat curing in a short time (e.g. The compressive strength of PS60 is 135.5 MPa and 134.4 MPa under curing conditions of 90 degrees C (48 h) and 1 MPa (6 h), respectively). The cement is completely hydrated, and the hydrated product of calcium hydroxide is completely consumed in UHPC that contains a lot of PS under the heating curing (90 degrees C, 1 MPa-180 degrees C and 2 MPa-25 degrees C) by the result of TG combined with XRD. In addition, the hydration products are tobermorite and xonotlite under high temperature and high pressure curing conditions.

引用

页数：12

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