NHL (Natural Hydraulic Lime) is a traditional building material in Europe. NHL has declined after popularization of portland cement, but recently, it has been revalued because of its durability and environmental performance. In this paper, various experiments were carried out to examine the environmental performance of NHL about thermophysical properties, absorption and desorption of water vapor, and gas adsorption capability. The results show that NHL has various good environmental performance and has a great deal of possibility as environment controllable building materials.
