Clay - Ecological Natural Binder

For the masonry mortars from the actual constructive solutions (confined masonry) a high strength is not required. The cement - lime mortars using in which composition artificial binders and natural sands are present are expensive and is including a high obtaining energy consume. The clay, residual rock, represents a mineral binder that can satisfy the imposed requirements for the mortars from the confined masonries. The clay resources are unlimited and can be found in the areas pour in natural construction materials. The presented study is analysing four clay sources from several Moldavian counties that can be used as binder in masonry. The mineralogical analysis, hardened clay's characteristics and especially the support adhesion are presented.