Document Type : Research Article
Department of Civil Engineering, Imam Khomeini International University, Qazvin, Iran.
With the rapid economic growth and continuously increased consumption, a large number of waste materials are generated. Waste materials reusing will reduce the demand for the natural resources of the raw materials, and it will reduce the spaces used as landfills. Among these wastes is glass, which is widely used in our daily life. The major problem with the use of glass in asphalt mixes has been the incompatibility of glass and asphalt binder at their interface particularly in the presence of moisture. The objective of this research is to promote the strength of glassphalt against moisture damage with liquid anti-strip additives (LAA) based on the properties that affect the adhesion between the aggregate-asphalt binder and the cohesion strength of the asphalt binder. Surface free energy (SFE) and laboratory testing in different freeze-thaw cycles were used to evaluate the effect of LAA on the moisture susceptibility of glassphalt. The fine part of natural aggregate (NA) was replaced by CG at rates of 0, 5, 10, 15, and 20%. The results showed that, for mixtures containing crushed glass (CG), the tensile strength ratio (TSR) is lower than those of the control mix, and they decreased when the CG increased in the mix. The use of LAA caused the TSR of glassphalt to increase up to 80%. Also, the results of the SFE method showed that adding LAA causes the total SFE of the asphalt binder to increase, which results in a decrease in stripping between the glass aggregate and asphalt binder in the presence of water.