ABSTRACT
The objective of this research is to evaluate whether an improvement in compressive and flexural strength can be obtained by substituting a percentage of the fine aggregate of a concrete mix with ground recycled glass. The methodology used consisted of making a conventional concrete mix as a control mix of f´c=28 MPa and its comparison with two mixes with the same design, but with 10% and 15% replacement of the weight of fine aggregate by ground recycled glass. Based on the ASTM technical standards, a total of 75 concrete cylinders were made to evaluate the compressive strength at test ages of 3, 7, 14, 21 and 28 days; and a total of 18 beams to evaluate the flexural resistance at test ages of 3, 14 and 28 days. For each test age, both in compression and in flexion, there was an increase in resistance in the mixes with 10% glass as a fine aggregate replacement compared to the control concrete mix; however, this increase was not significant for flexural strength. The mixes with 15% glass as a fine aggregate replacement presented lower resistances than those of the control concrete mix. It is concluded that the ideal replacement percentage for this study is 10%; since 15% negatively affected the resistance of the concrete.

AUTHORS

Randall Matos
Rene Villarreal