Performance and Durability of Rendering and Basecoat Mortars for ETICS with CSA and Portland Cement

Abstract

The production of Portland cement (OP) is commonly associated to significant level of energy consumption and gas emissions. The use of calcium sulfoaluminate cement (CSA) can be a sustainable alternative binder, since its production releases about half of the CO2 emissions and its clinker requires 200 °C lower temperatures, when compared to OP. Furthermore, CSA has fast setting time and achieves higher strength in shorter periods, as well as reduced shrinkage. This paper discusses the incorporation of CSA in rendering mortars and basecoat mortars for ETICS (External Thermal Insulation Composite Systems). The physical-mechanical properties of mortars made with OP and CSA cements were experimental evaluated. The results showed that the introduction of CSA generally improves shrinkage, compressive strength, water absorption at low pressure, enhances the tensile bending strength and decreases the setting time. The amount of CSA introduced into the mixture significantly affected the properties of the cement matrix.

The Effect of Density on the Delicate Balance between Structural Requirements and Environmental Issues for AAC Blocks: An Experimental Investigation

“…A quite common solution, which is particularly suited for the retrofit of existing buildings, is represented by the use of external thermal insulation composite systems (ETICS). These systems are formed by thermoinsulation plates fixed onto the substrate with the use of glue and special anchors and covered by an external coating [8]. Another possible strategy is to use new materials with good insulation properties and adequate bearing capacity to realize "single layer" walls, without the need to resort to additional external thermal insulation systems or limiting the thickness of additional layers [2,9].…”