Thermal Conductivity of Aerated Concrete Based on Response Surface Method

Abstract

Aerated concrete (AC) is widely used in the construction industry due to lightweight and advanced thermal properties. In this research, thermal conductivity (λ) of non-autoclaved AC was characterized with Response Surface Methodology (RSM). The effect of fine aggregates with different Al2O3 contents on the minimal λ value was analyzed using RSM. Test results show that sand with higher Al2O3 content has more influence on lower λ of AC. The regression models were significant and applicable to analyzation and prediction of λ of AC with good accuracy.

Frost Resistance Number to Assess Freeze and Thaw Resistance of Non-Autoclaved Aerated Concretes Containing Ground Granulated Blast-Furnace Slag and Micro-Silica

“…Moreover, as stated previously, an autoclave curing is typically used for the AC, but it is not economical and is environmentally costly because of its high pressure and temperature operation. The authors' previous work [21,22] indicated that 28-day compressive strength, porosity, and thermal conductivity of fully cured non-autoclaved aerated concrete (NAAC) is not much different from those of the autoclaved AC. Therefore, to develop a sustainable and durable NAAC mixture with the good F-T resistance and thermal energy conservation, GGBFS and MS were selected as the main materials to cast NAAC mixtures in this study.…”