Development of Sustainable Cement Mortar Using Waste Container Soda-Lime Glass as Replacement for Fine Aggregates (Sand): Physical, Morphological and Mechanical Characteristics
Abstract
There is now a significant world-wide interest to solve the environmental problems caused by industrial waste and other materials by including such materials in the manufacture of concrete. In this regards, this work deals with possibility of utilizing waste soda-lime glass (WSG) as admixture material to partially substitute fine aggregates (sand) in cement mortar (CM). WSG was obtained and recycled by thorough washing and drying followed by grinding and milling into fine powder (<75µm). Six (6) different compositions containing 0, 10, 20, 30, 40 and 50 wt. % WSG in cement – sand matrix (CM/WGs) were composed and compacted in a mould of 150 x 50 x 10 mm at a force of 10 MPa. The CM/WGs were left to cure in ambient temperature for 8 days. Properties such as water absorption, density, acid resistance, compressive and flexural strength were investigated to assess the performance of the developed WSG incorporated CMs. The results showed that densities decreased by 10.2 %, 19.8%, 22%, 17.4%, and 16.5% respectively as the % WSG increase compared with sample without WSG while there is increase in water absorption by 8.1%, 38%, 7.5%, 19.5% and 24.6% above the control sample. The CMs showed better resistance in HCl compared with H2SO4 while both flexural and compressive strength improved than the control sample without WSG. The morphology showed portions of C-S-H, C-A-S-H and ASR gel. The results therefore justify the beneficial effects of incorporating WSG as possible material in cement mortar instead of allowing them to constitute nuisance.
Keywords
Cement mortar, Waste soda-lime glass, Fine aggregates, Morphology
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