2015 CSCE Annual Conference Regina - Building on our Growth Opportunities

2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference


Title
Evaluation of using Recycled Glass as Concrete Aggregate - ASR Test Results

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Author(s)
Dr. Abdurahman Lotfy, Lafarge Canada Inc.
Dr. Solomon Asantey, Fanshawe College (Presenter)
Ms. Amneh Kalloush, Fanshawe College
Abstract

Abstract

 To strive for more sustainability contribution, the use of recycled glass as aggregate in concrete has attracted much research interest. Many studies have been performed by mixing different sizes and percentages of glass to replace aggregate in concrete mixes.  Test results have shown that concrete containing glass as an aggregate replacement has lower water absorption. However, the use of glass in concrete may result in alkali-silica reaction (ASR). This reaction causes extensive cracking and expansion within the aggregate particles, resulting in potential durability issues of hardened concrete. The objective of this research was to investigate the potential for alkali reactivity of concrete aggregates when using mixes containing different percentages of local recycled crushed glass. During the summer of 2014, trial tests were conducted by Lafarge Canada Inc. and Fanshawe College’s Concrete Technology Research Group to assess the use of recycled glass as an aggregate in concrete.  This paper presents the results of ASR testing on several mixes using different percentages of glass. The tests were completed based on the requirements of ASTMC1260–Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method).  The expansion of the prepared test specimens increased as the replacement level of glass aggregate increased. The results demonstrate that even as low as 5% replacement of recycled glass as fine aggregate in concrete, the percentage expansion was excessive leading to considerable durability issues. 

Affiliations

AbdurahmanLotfy,  Ph.D., P.Eng. 

Regional Manager, New Products Development, Innovation & Commercialization, Lafarge, Toronto, ON

Solomon Asantey, Ph.D., P.Eng. 

Professor, Civil Engineering Technology Program,

Principal Investigator, Concrete Technology Research, Fanshawe College, London ON

AmnehKalloush, M.Eng.,P.Eng.

Professor, Civil Engineering Technology Program,

Co- Investigator, Concrete Technology Research, Fanshawe College, London ON