Valorização de agregado de resíduos da construção civil na correção granulométrica de solos argilosos para produção de solo-cimento

Abstract

Civil construction is fundamental for human development, but it represents the sector of natural human activities, generates high energy consumption and produces about 50% of solid waste generated by human activity. As a way of reducing the environmental impacts of the sector, the use of civil construction waste (CW) in the manufacture of soil-cement is an excellent way of incorporation into the production system, which are most often discarded irregularly. The incorporation of these residues can be performed in the correction of clayey soils for the manufacture of soil-cement products. In this research, CW used by a recycling plant with fine aggregate granulometry was used. Soil and CW were characterized, followed by the experimental factorial design of two complete levels with central point. The CW/soil dosages were 50% soil and 50% CW, 37.5% soil and 62.5% CW, and 30% soil and 70% CW. The cement content added to the mixture was 10%, 12% and 14%. Adhesion resistance and water absorption tests were performed. After the trials, the results were statistically proven. The only and exclusively one that does not respect the norm limits with 10% correction and 10% of cement soil of 50% CW had resistance to resistance of 1.53MPa and absorption of 22%. The remainder of the amount of water embedded for the incorporation of 3.4 MPa and absorption of minimum 18.1% of 70% of CW and 30% of of soil and 14% of cement.