A Study on Strength Properties of Geopolymer Concrete with Addition of G.G.B.S
نویسنده
چکیده
–Flyash based geopolymer concrete is introduced in 1979 by Davidovits to reduce the use of OPC in concrete. Geopolymer is an inorganic alumino-hydroxide polymer synthesized form predominantly silicon and aluminum materials of geological origin and by product materials such as flyash (with low calcium). In this paper an attempt is made to study strength properties of geopolymer concrete using low calcium flyash replacing with slag in 5 different percentages. Sodium silicate (103 kg/m 3 ) and sodium hydroxide of 8 molarity (41kg/m 3 ) solutions were used as alkalis in all 5 different mixes. With maximum (28.57%) replacement of flyash with slag (Mix no5), achieved a maximum compressive strength of 57MPa for 28 days. The same mix (Mix no5) is shown 43.56 MPa after exposure of 500°C for 2 hours. Keywords––Geopolymer concrete, sodium silicate, sodium hydroxide, flyash, slag, compressive strength, split tensile strength, flexural strength, and temperature effect.
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