Recycling of waste glass in concrete plant as aggregate and pozzolan replacement

Abstract

In this study, waste glasses that are not possible to be recycled were used in concretes as a pozzolan and coarse aggregate, and thus those are provided to be used as if those were recycled. In the first group (I); waste glass (WGA) is considered as a fine aggregate in a concrete. The used WGA was reduced to 5-12 mm in size corresponding the proportions of 0%-50% in the production of CEM I type cement. The other group (II); waste glass powder (WGP) were ground and incorporated into concrete with the levels of 5%, 15% and 30% by the weight of binder. The experimental results indicate for the group I; using WGA as aggregate did not have marked effect on the workability of concrete. For group II; the experimental results indicate that the mixtures which were ground with 5% waste glass as a pozzolan and 10% waste glass as fine aggregate gave compressive strength performance similar to the reference mixture. Higher percentage of waste glass (15%) replacement yielded lower strength values.