Harea berdeen erabilera morteroen eroankortasun termikoa aldatzeko

Abstract

Being cementitious composites, such as concretes and mortars, the most consumed construction materials, there is a necessity to replace as much of the natural resources consumed as possible by more eco-friendly, industrial and construction by-products. This paper studies the use of green foundry sand as partial to total replacement of the usual, limestone sand used in mortars and as fine aggregates in concretes. With that in mind, limestone sand has been replaced by green foundry sand in different percentages -0%-25%-50%75%-100%- and density, porosity, ultrasonic pulse velocity, thermal conductivity, volumetric heat capacity, flexural strength and compressive strengths are evaluated. According to the results obtained, it is clear that the clay content of the green foundry sand increased the water required by the mix, increasing the mortar porosity and thus decreased the other properties. However, green foundry sand could still be used for the confection of mortars were mechanical strength are low enough, for example, as evening layer on roofs and slabs.