Aslıhan Nida Derinpınar
Ahmet Özcan
MEHMET BURHAN KARAKOÇ
Abstract
In this study, the effect of glass powder substitution on the compressive strength and sorptivity values of ground granulated blast furnace slag (GGBFS) based geopolymer concretes was investigated. In geopolymer concrete mixtures, 5, 10, 15 and 20% by weight glass powder was substituted for GGBFS. Geopolymer concrete samples prepared by using sodium hydroxide as alkali activator were subjected to ambient curing for 28 days. The compressive strengths of the samples were between 39.54 MPa and 30.67 MPa. As the glass powder substitution increased, the compressive strength decreased. The sorptivity values of 5, 15, 30, 60 and 1440 minutes of the samples were determined. The cumulative sorptivity values of the samples, in which 0, 5, 10, 15, and 20% glass powder was substituted, were 1.14, 1.18, 1.38, 1.46 and 1.73 mm/min1/2, respectively. As the glass powder substitution ratio in the samples increased, the sortivity value increased. An exponential relationship was found between compressive strength and sorptivity values, and the correlation coefficient of this relationship was 0.95.
Keywords
Geopolymer concrete; Ground granulated blast furnace slag; Glass powder; Compressive strength; Sorptivity
