Avaliação de propriedades de argamassa industrializada utilizada em alvenaria estrutural em empreendimentos na cidade de Goiânia.

Abstract

Laying mortar is one of the components of the structural masonry system responsible for bonding and evenly distributing the loads acting on the masonry. This mortar, called industrialized mortar, is basically made up of agglomerate, aggregates and additives, and is purchased in ready-to-use packaging, with the worker responsible for hydrating the mortar at the time of application, according to the manufacturer's instructions. However, it is common on construction sites for these instructions not to be followed, thus altering the desired properties and performance of the mortar. In this work, physical and mechanical tests were carried out on industrialized mortars of varying strength levels in order to verify the product's suitability for the properties described by the manufacturer and those recommended by NBR 13281. For mechanical strength tests, 192 samples were produced, 96 in the laboratory and 96 on site, as well as samples for fresh state tests: density, consistency, water retention and setting time. The results indicated that in the laboratory environment, the properties of the mortars were adequate for the manufacturer's specifications. However, for the samples obtained from the mortars manufactured on site, the tests showed insufficient results to meet the product specification and therefore the structural design.