Morteros hidráulicos de cal y chamota

Abstract

The aim of this research project has been to obtain aired-lime based hydRaúlic mortars with the addition of chamotte or burnt clay powder obtained from the ceramic industry waste. By doing this, hydRaúlic properties have been included into lime and hydRaúlic mortars with a great improvement in mechanical properties. In order to achieve this, different types of chamotte obtained from clay burnt at different temperatures have been tested, changing, at the same time, the proportions of lime, sand, chamotte and water. All the texts have been performed preparing a double set of test pieces to be kept at room temperature or to be immersed in water, determining the Shore C hardness and the mechanical compressive and tensile strengths. Further on, X-ray diffraction analysis have been developed to determine the qualitative composition of the crystalline structure, as well as micro structural analysis, using stereomicroscope and electric microscope scanning, with X-ray microanalysis have been used. As a conclusion, several types of mortars have been created with different proportions, which can be used, due to its characteristics, as keying mortars in brickwork, for restoration work as well as for new constructions.