https://orcid.org/0000-0002-4632-2449
Abstract
To obtain the optimum workability of roller compacted concrete (RCC), it is necessary to fully consider the degree of influence of each component of RCC. In this research, the influence of water-cement ratio, the content of cement slurry, the content of mortar, the sand ratio, the particle size of maximum aggregate, and the content of mineral powder on the workability of RCC was studied by modified Vebe test. The results showed that the Vebe consistency decreased with the increase of water-cement ratio. The recommended range of cement slurry surplus parameter was 1.1∼1.4; the recommended range of cement mortar surplus parameter was 1.2∼1.6; mixing the fly ash and silica fume into RCC is beneficial to its workability, but the content of fly ash could not exceed 20 %, and the optimum value of the content of silica fume was between 5 and 7.5 %; and the sand ratio has a significant effect on RCC, and there is an optimal sand ratio just like ordinary concrete, which is 34 % in this study.
Issue Section:
Technical Papers
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