Avaliação da resistência de um solo do município de Paulista - PE estabilizado com Cimento Portland e resíduo do polimento de rochas ornamentais.

Abstract

The following work addresses the soil stabilization method done with chemical stabilizers. This technique is based on adding stabilizers to the soil that does not have the characteristics and properties suitable for use in civil construction, in order to improve it. Among the most used stabilizers is the cement that when incorporated in the soil results in better values of strength and stiffness. However, there is a strong incentive in the current environment for the use of industrial waste in construction. The ornamental rock polishing residue is a potential stabilizer that falls within this category of materials. Therefore, this work aims to study the behavior of an expansive soil when stabilized with the marble polishing residue and the cement, as well as to promote a cost comparison between this technique and the stabilization with only cement and with only lime. The soil used was collected from the municipality of Paulista-PE and was stabilized with additions of 30%, 40% and 50% of residue. The cement content and the specific dry weight were set at 6% and 15 kN/m³, respectively. Simple compression strength tests were performed after 7 days of cure. The results indicated that the marble residue is capable of promoting greater resistance to the soil as its contest increases when compared to a soil stabilized only with cement. Na increase of 30 kPa was observed by adding 30% of residue to the soil-cement mixture. However, the soil stabilized with lime showed better results, having a difference of 400 kPa when compared with the addition of 50% of residue. The costs for stabilization with the three types of chemical stabilizers (cement, cement and residue and lime) were also more favorable for lime.