Resistance to Recycled Materials in Asphalt Mixtures

Today, one of the important criteria in projects is its compatibility with the environment and its economics. The quality of materials and materials in the pavement is of great importance in its design as well as the functional characteristics of the roads. In cases where the material is not available or is far away from the workshop, the feasibility of using the available materials is necessary. This reduces transport costs as well as the use of materials that seem redundant in some cases. If it is possible to maintain quality or improve it, instead of using natural materials from recycled materials, it will be a step towards the improvement of the environment and economics. In this research, various percentages of construction waste and recycled crushed aggregate in asphalt mixtures are used. Indirect tensile strength, resilient and shear modulus experiments were carried out on samples containing various percentages of construction waste and recycled crushed concrete in asphalt mixtures on the samples. The results of using different percentages of debris in asphalt mixtures show that the indirect tensile strength ratio is reduced compared to the control sample and the modulus of shear strength and roughness increase. The maximum amount of asphalt mixing and grooving modulus is 20% of the construction waste. The results of using different percentages of construction waste in asphalt mixtures show that the ratio of indirect tensile strength and tensile strength versus the control sample is improved and the modulus of resurfacing is reduced. The highest ratio of indirect tensile strength and shear strength is in the asphaltic mixture containing 50% and 75% recycled crushed aggregate, respectively.