Due to the successful sustainable construction materials of precast concrete for green materials, developing quality and durability of geopolymer concrete, including improved comfort capabilities that offer good thermal insulation properties, has been focused. Thus, to achieve the highest possible thermal insulation performance, a new insulation material, which is glass bubble as a solution with low thermal conductivity value, develops with geopolymer concrete. It was shown that the replacement of glass bubbles could only be replaced at 10%, which is most applicable for satisfying the minimum strength requirement of the load-bearing structure. Thermal properties are demonstrated by the development of geopolymer concrete with thermal insulation material having low thermal conductivity, low heat dissipation, and high specific heat, which is relevant to reduce building thermal load. The decrease in thermal conductivity and thermal diffusivity is due to the increase of void ratio from glass bubbles along with thermal conductivity of the glass bubble itself helps to improve thermal properties. The presence of a glass bubble internal gas core contributes to the high specific heat, which results in a longer time for the heat to be stored before the heat leaks out of the building.
