Effect of rubber particles and steel fibers on frost resistance of roller compacted concrete in potassium acetate solution. (30th October 2018)

• Record Type: Journal Article
• Authors: Zhang, Wuman; Gong, Sheng; Zhang, Jingsong
• Is Part Of: Construction & building materials. Volume 187(2018)
• Page Start: 752
• Page End: 759
• Publication Date: 2018-10-30
• Subjects: Roller compacted concrete -- Freeze-thaw cycles -- Potassium acetate solution -- Rubber particles -- Steel fibers; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.07.244
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The frost resistance of RCC with rubber particles and steel fibers were evaluated. RCC will be damaged by the freeze-thaw cycles in 25% (by weight) KAc solution. Steel fiber and rubber particles do not improve the frost resistance of RCC. Abstract: In this paper, the frost resistance of roller compacted concrete (RCC) mixed with rubber particles and steel fibers was investigated, 25% (by weight) potassium acetate (KAc) solution was the medium in freeze-thaw cycles. The mass loss, relative dynamic elastic modulus, microstructures, and pore structures were measured. The results show the accumulated mass loss is the greatest and up to 155.17 g/m 2 after 300 freeze-thaw cycles in KAc solution when the rubber particles and the steel fibers are added at the same time. If the later hydration of cement is not considered, the improvement effect of the steel fibers and the rubber particles on the reduction of the relative dynamic elastic modulus is also not obvious. The addition of the rubber particles and the steel fibers does not effectively reduce the cracking caused by 300 freeze-thaw cycles in KAc solution because microcracks are observed in all specimens. The incorporation of the steel fibers and the rubber particles also cannot effectively reduce the increase of porosity caused by 300 freeze-thaw cycles in KAc solution.