Working Paper Article Version 1 This version is not peer-reviewed

Mathematical and Mechanical Modeling of Steel Slag Coarse Aggregate in Concrete

Version 1 : Received: 27 September 2020 / Approved: 28 September 2020 / Online: 28 September 2020 (00:42:46 CEST)

How to cite: Wang, G.C. Mathematical and Mechanical Modeling of Steel Slag Coarse Aggregate in Concrete. Preprints 2020, 2020090680 Wang, G.C. Mathematical and Mechanical Modeling of Steel Slag Coarse Aggregate in Concrete. Preprints 2020, 2020090680

Abstract

Steel slag aggregate, as the coproduct of steelmaking has been satisfactorily used in unbound granular materials in construction. Although numerous studies have revealed that concrete containing steel slag aggregate possesses superb strength and mechanical properties, the use of steel slag aggregate in portland cement concrete is currently prohibited in construction. What is the practicality, how to connect the laboratory experiment results to the end-product behavior, and further convert the research results into real construction? Based on the philosophy of nonconventional materials utilization, i.e., laboratory testing, field demonstration, and criteria establishment, this paper presents the mathematical and mechanical modeling of steel slag aggregate in concrete leading to a usability criterion for steel slag use as a coarse aggregate in concrete. The development of the modeling includes (i) the two distinct laboratory test methods to determine the expansion force generated by steel slag particles; (ii) converting the expansion force of mass steel slag aggregate to the expansion force of a single steel slag particle; (iii) mechanical disruption modeling of slag failure; and (iv) usability criteria for the use of coarse steel slag, or other volumetrically expansive-prone slag aggregate, in concrete or other rigid matrices. The paper provides the solutions to the first two questions. Through the mathematical and mechanical modeling, provides the answers to the other two questions that could result in specification and guidance establishment.

Subject Areas

steel slag; concrete; expansion force; disruption ratio; rigid matrix

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