Can Steel Slag Be Used as an Aggregate in Concrete and How? A Technical Approach by and Testing and Theoretical Molding

George Wang, Yuhong Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Steel slag is the molten byproduct from steelmaking operations that is subsequently air-cooled for use. It has been used in cement manufacture and as unbound granular materials in construction. While numerous studies have revealed that concrete containing steel slag aggregate possesses good mechanical properties, and slag, as a byproduct, is cheaper than virgin aggregates, its practical use in Portland cement concrete is currently a forbidden area in the construction practices. What is the practicality, where is the crux of converting research results into to real production, and how to build the bridge between the laboratory experiment and the end products? Based on the philosophy of slag utilization, i.e., laboratory testing, field demonstration, and criteria establishment, the questions to be answered includes (1) two distinct laboratory test methods to determine the expansion force generated by slag particles; (2) conversion of the expansion force of mass slag aggregate to the expansion force of single slag particle; (3) mechanical disruption model of slag failure; and (4) usability criteria for the use of steel slag in a rigid or restrained matrices. The paper introduced the answers for the first two questions; and provides the mechanical model and criterion deduction to answer the other two questions that lead to criteria and specification establishment.
Original languageEnglish
Title of host publicationConstruction Research Congress 2016
Subtitle of host publicationOld and New Construction Technologies Converge in Historic San Juan - Proceedings of the 2016 Construction Research Congress, CRC 2016
PublisherAmerican Society of Civil Engineers (ASCE)
Number of pages10
ISBN (Electronic)9780784479827
Publication statusPublished - 1 Jan 2016
EventConstruction Research Congress 2016: Old and New Construction Technologies Converge in Historic San Juan, CRC 2016 - San Juan, Puerto Rico
Duration: 31 May 20162 Jun 2016


ConferenceConstruction Research Congress 2016: Old and New Construction Technologies Converge in Historic San Juan, CRC 2016
Country/TerritoryPuerto Rico
CitySan Juan

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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