Correlación entre las propiedades físico-mecánicas del mortero de cemento Portland y el mortero de cal estabilizado con almidón de arroz

Abstract

This paper investigates the incidence of rice starch applied to a lime mortar, in addition to replicating the process used in the construction of the Chinese wall, dosing a mortar that accomplish the specifications of “O” type glue mortar of 24 Kilograms per square centimeter at 28 days. For that reason the dosage of three types of mortars was carried out: normal lime mortar (1:2 dosage) MNC 1:2, lime mortar stabilized with sticky rice (1:2 dosage) MCEA 1:2 and cement mortar (dosage 1:5) MCP 1:5. The partial replacement of rice starch in the volume of water of the mash is crucial to determine the optimum percentage of rice starch to be used. A range of 0,5 percent to 4,0 percent of additive was used, with variation of 0,5 percent being subjected to compression tests each lime mortar with that variation of additive to identify the optimal percentage. The inclusion of rice starch in the lime mortar increases the compressive strength by the chemical reaction that occurs between calcium carbonate (hydraulic lime) and amylopectin being an abundant component in rice. The lime mortar stabilized with rice starch MCEA 1:2 has a resistance of 25,52 Kilograms per square centimeter so that accomplish the characteristics of a mortar of glue “O” type that have 24 Kilograms per square centimeter at 28 days.