A Laboratory Scale Synthesis of Geopolymer from Brick-dust Waste
Geopolymers have been synthesized from waste brick-dust (BD) using NaOH and Na2SiO3 as activators in laboratory scale. Effects of alkali concentration, amount of Na2SiO3 and curing time have been studied to improve the quality of geopolymeric products. The geopolymerization process was carried out using 2-8 M NaOH solutions, Na2SiO3 to BD mass ratio of 0.5-2.00 and curing time variation from 6-28 days. The curing temperature was fixed at 40°C in all the cases. Maximum compressive strength of 7 MPa was obtained with BD treated with 6 M NaOH solution and was obtained with particle size of 53 micron in this research work. Similarly, the maximum compressive strength of 43.87 MPa was obtained with 1.5 mass ratio of Na2SiO3 to BD. Furthermore, the compressive strength was found to be increased with increasing curing time and reached up to the maximum value of 60 MPa with 28 days curing.