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Mixture design of concrete based on rheology

An excellent mix proportion of concrete should satisfy the workability requirements for casting process, and also meet the requirements for mechanical properties, durability, economy and even ecology of engineering application. The workability of concrete is often evaluated by the single parameters such as slump, consistency, slump flow, or flow time, which are empirical, qualitative, subjective and lack of scientific basis. Rheology is an effective tool to characterize the workability, predict the stability and even the compactability of fresh concrete. The existing optimization methods of concrete mixture proportions based on rheology of cement paste and concrete were briefly summarized. Based on the rheological behavior of fresh concrete, a new mixture design procedure was proposed using the simplex centroid design method, which could give a practical guidance in the determination of coarse aggregate gradation, total binder content, and cementitious composition. Several real engineering applications proved that this proposed method was conductive to strike a balance between the rheological properties, stability, mechanical properties and economy in the concrete production.

Abstract: Author(s): Caijun Shi, Dengwu Jiao and Qiang Yuan
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

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

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