For several decades, class F fly ash has been an attractive supplementary cementitious material, at least in part, due to its ability reduce Portland cement consumption and mitigate alkali-silica reactions concrete. However, availability is becoming uncertain as the energy industry decommissions coal burning power plants it transitions renewable production. This situation creates a need identif...

Having a prediction model for the geopolymer concrete (GPC) compressive strength gives Engineers an edge in project quality and cost control. Compressive of is dependent on various components that formed concrete, curing regime. This paper outcome review variables (components relationships) influence (GPC). The identified from literature are; Concentration (Molarity) Hydroxide solution, Alkalin...

Assessment of pozzolanic reactivity is commonly based on a direct and indirect method which mostly used the electrical conductivity method. However,these methodsare limited by long-duration requirements or need to be done in laboratory. By modifying sandbox test measure resistivity Rice Husk Ash (RHA) as pozzolan, this investigation tries offer simpler that can situ. The RHA was heated oven wit...

Bentonite is a mixture of clay and non-clay minerals. Montmorillonite mineral dominant in bentonite. Silica alumina bond the crystal structure montmorillonite. Therefore, they cannot contribute to pozzolanic reaction. Heat treatment bentonite leads destruction montmorillonite converting silica reactive phases. Thermally activated (TAB) relatively low pozzolan when used as partial replacement Po...

Abstract Cement factories in Indonesia rarely produce OPC due to the high cost of production and less environmentally friendly, so they prefer PPC or PCC. located areas that are rich natural pozzolan will producing PPC. In general, there is an assumption increasing compressive strength concrete using slow at early age. Based on these assumptions, it necessary conduct research The specimen used ...