Optimization of Building Rubbles in Flexible Pavement Using Experimental Approach and Mechanistic- Empirical Method

Abstract

Abstract. The broad production of building and destruction waste and its illegal deposition is dangerous present phenomena. This investigation suggests assessing the utility of using recycled building rubble (RBR) in pavement implementing. An experimental plan was achieved on various compositions of RBR by geotechnical characterization, bearing capacity and repeated plate loading tests. Relationship between the vertical applied stress and the corresponding vertical deformation as well as the deformation along the horizontal distance from the load center was studied experimentally and theoretically using Mechanistic-Empirical methods. Non linear relationships between measured and predicted values were achieved for each mixture. The results illustrate that the structure and the compaction effort affect on the natural and mechanical features of the RBR aggregate. The compaction operation has confirmed a fractional squashing and fracturing of RBR particles, altering the gradation and raising the percentage of cubic grains contributing to a best intensification of the RBR grains and consequently a refinement in strength, resilient modulus and resistance to rutting. Based on the statistical process achieved in this paper, the developed equation can be used to calculate the measured deformation for any collection of the parameters included in the regression model. Generally, the use of RBR aggregates in pavement is totally feasible and that the advantages related to these aggregates spread beyond the environmental notions of their use.