2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference


Title
Recycled Materials in Concrete Applications - Benefits from Waste Free Ontario Act

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

Solomon Asantey, Ph.D., P.Eng.

Fanshawe College, London ON Canada, sasantey@fanshawec.ca

Amneh Kalloush, M.Eng., P.Eng

Fanshawe College, London ON Canada, akalloush@fanshawec.ca

Abdurahman Lotfy, Ph.D., P.Eng.

LafargeHolcim Canada Ltd., abdurahman.lotfy@lafarge.com

ABSTRACT

According to Statistics Canada, the cost of waste management by local governments increased from  $1.8 billion in 2004 to $3.2 billion in 2012. The new Ontario provincial government’s Waste Free Ontario Act 1 (WFOA) aims to shift responsibility and cost of recycling programs and materials from the communities and municipalities to manufacturers of waste products. This will potentially motivate manufacturers to find alternative uses for the 4.9 million tonnes of waste generated in Ontario per year. One potential alternative is to reuse post-consumer products in the manufacture of concrete products and cement. Current research focusses on making concrete “greener” by replacing its traditional components with environmentally advantageous alternatives.

The goal of this study is two-fold. First, a survey summary of waste materials potentially useful in concrete production that will be impacted by the Act (WFOA), is presented. Second, a summary and literature review is presented of the five most important waste materials impacted by the WFOA, which have been identified as useful in cement and concrete production.

These five waste materials are glass, polystyrene, polyethylene terephthalate (PET), waste paint and waste tires. A detailed literature review of current concrete research done on these five materials is presented. Data analysed on volume of waste generated versus volume diverted indicate that waste tires result in 109% volume diverted (more than 100% because of previous stockpiling). Thus, of the five recyclable materials, waste tires has the most practical application in the concrete production and construction industry in general.

It is proposed that further research be done to investigate the combination of some of these materials in concrete production. For example, waste rubber and latex paints, with the proper ratios, could be used in roadwork applications for weather resistant, sound absorbing road surfaces.           

Keywords: Waste Free Ontario Act, waste materials, concrete, tires, paint, glass, polystyrene, PET