Effect of Flat Glass Powder on the Slump Test and Microstructure of Portland Cement Concrete

Abstract:

A differential feature of this study was the analysis of the slump test and microstructure of Portland cement concrete containing a little-studied type of waste – flat glass powder. The concrete was produced using 5%, 10% and 20% (by mass) of waste glass in place of sand, and water-to-cement (w/c) ratios of 0.50, 0.55 and 0.58. The slump of concrete decreased with increasing glass powder content at the three w/c ratios and its fluidity was impaired with 20% of waste glass at the w/c ratio of 0.50. A scanning electron microscopy analysis revealed a reduction in voids as the waste glass content increased from 0% to 10%. At the above mentioned percentages, flat glass powder shows a promising potential for use as fine aggregate in Portland cement concrete. However, the use of plasticizers should be considered for concrete with low w/c ratios (less than 0.50) and high waste glass percentages (more than 20%).

• Periodical: Materials Science Forum (Volume 881)
• Pages: 259-264
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.881.259
• Online since: November 2016
• Authors: Edson Jansen Pedrosa Miranda Jr.*, A.E.M. Paiva
• Keywords: Fine Aggregates, Flat Glass Powder, Microstructure, Portland Cement Concrete, Slump Test, Waste Glass

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