Experimental study on autogenous volume deformation of RCC mixed with MgO

The application of MgO to control thermal stress for concrete structures has achieved many accomplishments over the years. MgO is an important type of materials for the shrinkage cracking control of mass concrete in general, and Roller Compacted Concrete (RCC) dams in particular. Previous studies ha...

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Published inIOP conference series. Materials Science and Engineering Vol. 794; no. 1; pp. 12047 - 12052
Main Authors Nguyen, Van-Chinh, Zhang, Xiu-Song, Nguyen, Van-Nghia, Phan, Dinh-Tuan, Liu, Gang
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2020
Subjects
Concrete
Concrete dams
Concrete structures
Deformation
Magnesium oxide
Mass concrete
Roller compacted concrete
Shrinkage
Thermal stress
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Summary:The application of MgO to control thermal stress for concrete structures has achieved many accomplishments over the years. MgO is an important type of materials for the shrinkage cracking control of mass concrete in general, and Roller Compacted Concrete (RCC) dams in particular. Previous studies have investigated the application of MgO concrete and have proven the cracking prevention of MgO concrete. The purpose of this paper is to measure the Autogenous Volume Deformation (AVD) of RCC mixed with the MgO-expansive agent. And these experiments were conducted under different MgO content, temperature and curing time conditions. The experimental results of the AVD process show that the AVD process increased with the MgO content, curing time and temperature condition. The reseach outcomes are evidence that the hydration of expanded materials in concrete can compensate for shrinkage.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/794/1/012047