Study on Properties of Self-Compacting Geopolymer Concrete

The sustainable production ofself-compacting geopolymer concrete (SCGC) is an environment friendly concrete which has lower carbon footprint as compared to that of conventional concrete. This paper presents the study of the fresh and mechanical properties for self-compacting geopolymer concrete, In addition to the physical properties. Some parameters were studied such as varying the molarity of sodium hydroxide from 8M to 14M, ratio of sodium hydroxide to sodium silicate solution were between (1:2 to 1:2.75),alkaline solution to fly ash ratio, extra water ratio, fly ash content was between 400 Kg/m 3 to 500 Kg/m 3 , curing time, and curing temperature. Compressive strength test was carried out at the ages of 3, 7, 28, and 91 days. The others mechanical and physical properties tests were carried out at the age 28 days. The Increase of sodium hydroxide molarity slightly reduces fresh properties of self-compacting geopolymer concrete. The mechanical properties of self-compacting geopolymer concrete are only a fraction of the compressive strength, as in the case of self-compacting concrete (SCC) with Portland cement. Increasing in the test results of physical properties adversely affect it's the mechanical properties of self-compacting geopolymer concrete. Heat-cured self-compacting geopolymer concrete undergoes very low drying shrinkage compared to that of self-compacting concrete with ordinary Portland cement.