Review Article

State of the Art Study on Aging of Asphalt Mixtures and Use of Antioxidant Additives

Table 5

Studies on antioxidant additives.

ReferencesAntioxidantProperties evaluatedFindings

Mohammed [165]CRABit (CR30 and CR50)Resilient modulus, indirect tensile strength, creep, and fatigue resistanceImprovement in the engineering properties and the performance with the modification, particularly with CR30
Apeagyei et al. [166, 167]Furfural and DLTDP; AOXADURCracking potential, dynamic modulus, creep compliance, and tensile strengthAntioxidant-modified asphalt mixtures performed better than those with unmodified asphalt mixtures
Apeagyei [59]DLTDP/furfural, hydrated lime, vitamin E, carbon black, Irgafos P-EPQ, and Irganox 1010Stiffness modulus, cracking potentialFurfural and DLTDP additives provided a 40 percent reduction in aging compared to unmodified binders. Antioxidant-modified binders had a lower stiffness modulus and flexural stiffness compared to untreated binders
Reyes [168]Vitamin E as an antioxidant modifier; hydrated lime and fly-ash as stabilization agentsViscosity, stiffness, fatigue resistance, rutting potentialVitamin E–modified binder showed better resistance against fatigue cracking but there is concern on rutting resistance
Pan et al. [52]Coniferyl-alcohol ligninViscosity and ductilityConiferyl-alcohol lignin can slower oxidation and hardening
Williams [169]Agriculturally derived lignin-containing ethanol coproducts 3–12%Rheological properties from DSR and BBRLignin-containing coproducts showed beneficial antioxidant activity and stiffened the binder at all stages of aging
University of Illinois at Urbana-Champaign [158]AOXADUR which consists of three additives: aldehyde, thioester, and a caltalyst.Stiffness, thermal stress and cracking potentialDramatic increase in high-temperature stiffness and a substantial decrease in low-temperature stiffness
Dessouky and Diaz [170]Copolymers solution ethylene-butylene/styrene (SEBS) and solution styrene-butadiene rubber (SSBR) with enhanced antioxidant agentsBrittlenessCopolymers improved the rutting and moisture resistance of the modified asphalt mixtures but they decreased the fatigue life compared to the control mixture