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.Study on the mix proportion optimization of phosphorus slag self-compacting rock-fill concrete and its engineering application

Author(s): Jiangwei Li, Weiguo Shen, Yongfu Zhang, Shiyong Xu ,Xiaoli Ji and Mingju Bai
Paper category: Proceedings
Book title:4th International Symposium on Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Caijun Shi & Zuhua Zhang, Hunan University, China
Kamal Henri Khayat, Hunan University, China
Missouri University of Science & Technology, USA
Publisher: RILEM Publications SARL
Publication year:2018
Total Pages:13
Language : English

Abstract: The phosphorus slag self-compacting concrete was prepared by using phosphorus slag powder partly replacing fly ash as supplementary cementitious material, and its mix proportion is optimized, it is applied in the highway slope retaining structure combining with rock-fill concrete technology. The result indicates that the appropriate amount of phosphorus slag powder can improve the workability of concrete. The 7d strength of concrete gradually decreases with the increase of phosphorus slag; its 28d strength improves with the increase of phosphorus slag content and reach its peak value when the dosage is 25%,then it began to decrease. The optimum coarse aggregate/fine aggregate ratio of concrete is 80:20, the optimum volume ration of manufactured sand is 46%. A field experiment of highway slope retaining structure is built with C30 phosphorus slag self-compacting rock-fill concrete, it is
superior to ordinary concrete in appearance, strength and technical economic efficiency. The phosphorus slag self-compacting rockfill concrete not only realizes the resource recycling of
the waste phosphorus slag, but also contribution the to the solution of the shortage of fly ash in China southwestern, it has broad application prospect in the future.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00

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