Chapter
Aug 11, 2016
The Complete Recycling of Waste Concrete to Produce Geopolymer Concrete
Publication: Geo-Chicago 2016
Abstract
This paper investigates complete recycling and utilization of waste concrete, both the aggregates and the fines from crushing, to produce new concrete through geopolymerization. Based on previous studies and considering the workability of the new geopolymer concrete (GPC), 25% waste concrete fines (WCF), and 75% class-F fly ash (FA) were used as the geopolymer cement source material, NaOH/Na2SiO3 solution as the alkaline activitor, and the aggregates (both coarse and fine) from waste concrete crushing as the aggregate. The research systematically studied the effect of different factors on the initial setting time and the 7-day unconfined compressive strength (UCS) of the GPC. Based on this study, it can be concluded that waste concrete can be completely recycled and used to produce new geopolymer concrete with required UCS values.
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Published In
Geo-Chicago 2016
Pages: 103 - 111
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© 2016 American Society of Civil Engineers.
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Published online: Aug 11, 2016
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Xin Ren
Graduate Research Assistant, Dept. of Civil Engineering and Engineering and Engineering Mechanics, Univ. of Arizona, Tucson, AZ 85721-0072.
P.E.
Associate Professor, Dept. of Civil Engineering and Engineering and Engineering Mechanics, Univ. of Arizona, Tucson, AZ 85721-0072. E-mail: [email protected]
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