Abstract
In order to understand geopolymer chemistry in constructional and structural area, ceramic beads from sodium silicate and fly ash were made in this research. The concentration of sodium silicate in current beads varies from 60 to 75%. These geopolymers beads were prepared at low temperature of around 220 °C in microwave oven as compared to expandable clay geopolymers beads that need to be operated at high temperature nearly of around 1100 °C. Characterization of resultant samples was done. These beads can be used for self-healing purposes due to having porosity. If any crack formed in concrete, beads crack and bacteria will form insoluble calcium carbonate and fill these cracks. PCRWR has given report that Pakistan is approaching water scarcity. These porous beads have high capacity for retaining water for longer period as compared to soil, hence used for agricultural purposes. Furthermore, these porous foams are lightweight and high strength provides thermal insulation. These porous geopolymer beads are affordable, prepared at low cost and durable. The thermal conductive effect, high strength and light weight of geopolymer foams make concrete comfortable, safe and energy efficient.
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