A BLEND OF SODA-LIME SILICATE AND BOROSILICATE WASTE GLASS FOR PARTIAL REPLACEMENT OF CEMENT IN C ONCRETE

A BLEND OF SODA-LIME SILICATE AND BOROSILICATE WASTE GLASS FOR PARTIAL REPLACEMENT OF CEMENT IN C ONCRETE

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Abstract

This study evaluated the possibility of using Soda-lime Silicate and Borosilicate glass waste as

an effective additive for improving the properties of cement-based cementitious materials with

obvious advantages both from environmental and economic viewpoints after    the ultimate

strength (after 28 days of curing). Results show that the incorporation of various compositions

(wt) of waste glass powder (2.5%, 5.0%, 7.5%, 10%, 12.5%, 15%, 17.5% and 20%) increases the

compressive strength by nearly 46%, while higher amounts have the opposite results. When

waste glass particles are ball-milled to micro size powder, it is expected to undergo pozzolanic

reactions with cement hydrates, forming secondary Calcium Silicate Hydrate. The research work

looked at the chemical analysis using X-Ray fluorescence (XRF) technique and found some

differences in the chemical composition of soda-lime silicate and borosilicate waste glass. The

major oxides detected were combined proportion of SiO2, Al2O3, and Fe2O3with percentage

value of 73.202%, 72.998%, 0.411%, 0.201%, and 0.223%, 0.112% respectively.Workability

was determined by slump test method the control had slump of 55 mm, the samples that contains

5% of waste glass powder had 47mm slump less than the control thereby reduces the slump

value. The slump test correlates with the compacting factor, since the value of control mixes

higher. It means that it is more workable than other mixes, however none of the mixes fall below

the acceptable value for structural work. Con


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