Avaliação das propriedades de blocos de solo-cimento utilizando resíduos cerâmicos de construção civil

Abstract

As a way of mitigating the negative impacts of construction, new processes and products have been developed in a way that allows the reincorporation of construction and demolition waste (RCD). Soil-cement blocks are an efficient option for the incorporation of RCDs in the substitution of natural sand for the correction of clayey soils. The clay soil presents very fine grains and needs to be corrected for use in the soil-cement mix, this correction is usually made with natural sand that gives the soil desirable values of sand particles. In this work, the dosage of 10% of cement was applied to the corrected soil mass and the soil correction was done with 40% of soil and 60% of aggregate (natural sand and RCD of ceramic origin). Based on the dosages, blocks were tested which were tested for water absorption and compressive strength. The compressive strength tests showed values lower than the norm for saturated blocks, but they met the norm when not saturated. The water absorption exceeded the maximum allowed by the standard. These negative results may have been caused by a number of factors, such as by the press used to be manual rather than hydraulic, by empiricism in the identification of the moisture content for molding and the non-use of lime as a binder. As an advantage, the blocks with RCD showed a greater initial cohesion compared to the blocks with natural sand, this facilitated the removal of the material from the press.