Propriedades de argamassa estabilizada contendo metacaulim e resíduo de tijolo cerâmico.

Abstract

With the constant growth and development of civil construction over the years, it was necessary to invest in new technologies to improve the construction process. Faced with this scenario, stabilized mortar appeared. However, as it is a recent technology and the lack of standardization of its characteristics, there is some suspicion regarding its properties. The present work aims to study the influence of ceramic brick (RTCM) and metakaolin (MC) residues on the properties of stabilized mortars for laying. For this, mixtures of mortars with partial replacement of Portland cement by 10 and 20% MC and 10 and 20% RTCM, by mass, were studied. The mix used to prepare the mixtures was fixed in an agglomerating proportion: sand (1: 5.8) defined according to what is used in the local market. Mortars in the fresh state were evaluated for workability, fresh mass density, and incorporated air content. Then, six prismatic specimens (CP's) of dimensions 4 cm x 4 cm x 16 cm were molded for analysis in the hardened state. All mixtures were analyzed for 3 stabilization times (0, 36h and 48h). The results regarding the fresh state indicate that with the stabilization time the mixture loses workability. Another characteristic observed was that as the mass density increases, there is a decrease in the incorporated content. In the hardened state, resistance results were obtained for the samples with 10% and 20% CM with growth of 68.9% and 26.8%, respectively. One can observe a perspective of studies for mortars with 10% replacement of additions, which obtained better results.