Evaluation of a Tacking Stage for Adherence, between Mortar and Ceramic Brick

Abstract

The civil construction industrial sector is one of the most important in Brazil both for job opportunity and amount of utilized materials. However, it is also the sector that produces one of the highest volume of waste materials. In fact, it is estimated that total wastes to be around 30% of the raw materials supplied to the constructions. Several factors have been indicated as responsible for this wastage in civil construction, from lack of qualified labor to inappropriate technical procedures. One of the constructive stages, which has been the subject of doubt, is the previous preparation of a crude brick wall to receive a layer of mortar before painting. This previous preparation is known as tacking, which consists of coating the bricks surface with a light mixture of water, cement and sand to improve the mortar adherence. Since the tacking increases the masonry construction cost in approximately 2%, the present work evaluated its necessity. Tests were conducted without and with tack between the bricks and the mortar. The results showed a tendency to increase the adherence with time after tacking.

Ensaio não destrutivo em revestimento cerâmico utilizando um protótipo para detecção de patologia

“…Em um estudo realizado em algumas obras localizadas no interior do estado do Rio de Janeiro, foi verificado com os profissionais responsáveis pela colocação das placas cerâmicas que a metodologia utilizada para verificação de não conformidades dos revestimentos em geral eram cabos de madeira, barra roscada ou barras de aço, sem nenhum processo normatizado, baseando-se em situações empíricas. A metodologia utilizada na obra em questão baseia-se em soltar tais objetos de uma determinada altura, não padronizada, em direção ao revestimento e verificar o tipo de som gerado a partir do impacto, entre o objeto lançado e o revestimento [8].…”