Stiffness and Cracking Resistance Evaluation of Cold Bitumen Emulsion Mixtures Incorporated with Waste Glass Aggregates

Continuous use of hot mix asphalt (HMA) accelerates environmental deterioration, fossil fuel consumption, global warming, and depletion of natural resources. Further, waste generation and its disposal problem are also a threat to environment. The production of waste and the use of energy/virgin materials in HMA construction must be addressed concurrently. A right step toward the creation of environment-friendly road infrastructure is the use of Cold Bitumen Emulsion Mixtures (CBEMs), a form of Cold Mix Asphalt (CMA). Cold mix asphalt may be made more environment friendly by using waste materials as fine aggregates. In this study, Waste Glass (WG) is substituted for virgin fine aggregate at various percentages ranging from 0 to 100% (with 20% increments) in the binder layer of the CBEM. As per Marshall stability, Marshall flow, indirect tensile strength (ITS), and resilient modulus, the mechanical performance of CBEM-WG mixtures is assessed in this work. The performance of various CBEM-WG mixes is compared with each other, normal CBEM (NCBEM) and also with HMA. According to the findings, mechanical performance of CBEM having WG contents up to 60% was equivalent to that of normal CBEM (NCBEM) and conventional HMA, and it demonstrated superior performance at 60% plus WG content levels. The statistical analysis was performed to prove the feasibility and validity of replacing virgin materials with waste glass in terms of mechanical properties. The coefficient of determination R2 > 0.9 for all properties indicated addition of waste glass has significant impact on mechanical performance.