Influence of drying temperature on compressive strength of geopolymer binder

Environmentally friendly materials with low CO2 emissions have become an inevitable trend of the construction industry. This requires research establishments to develop new construction material products and manufacturing enterprises to tale the chance and change production directions to meet the needs of the market. Among those new materials, Geopolymer materials promise to contribute to the development of increasingly sustainable construction. This paper aims to study the effect of drying temperature and drying time on compressive strength of geopolymer binders made from type F fly ash, ground granulated blast furnace slag combined with activators solution, including 10M NaOH caustic solution, liquid glass. Research results show that when the drying temperature increases from 60°C to 120°C and the drying time increases from 6 to 24 hours, the compressive strength of geopolymer binders could be enhanced from 2.5 to 3.0 times, compressive strength can reach over 50MPa, fully meet the requirements of the strength of binders used for manufacturing building materials products in civil engineering and industrial construction.