Mortars for coating of walls using zeolitic sand

Abstract

The compression strength of mortars commonly used in the construction industry for coating outer walls, using common sand of bank (AR) as an aggregate, may vary depending on the relation sand/cement; of 1:3 with a strength of 90 Kg/cm2, 1:4 with 80 Kg/cm2 or 1:5 with 70 Kg/cm2. In this study, mortar mixtures using grounded zeolitic sand (ZM) as an aggregate were used. The proportions used varied from 1:2 to 1:10 of ZM regarding Portland cement (CPO). Also mixtures of calcium hydroxide and ZM were analyzed to make mortars with relations of 1:3:1 to 1:8:2 in relation to the CPO. When comparing both cases, the results concluded that the sample of ZM used in this study its superior compared to the AR due to its high pozzolanic activity making so a particularly resistant mortar. In addition, regarding thermal properties it was concluded that, within the studied ranks, the ZM in mortars has a greater effectiveness by presenting a considerably smaller thermal conductivities in comparison with AR