EFEITOS DO EXTRATO DE LIMÃO NA PROTEÇÃO CONTRA DANOS EM ASFALTO CAUSADOS PELA ALTA TEMPERATURA

The sun irradiation and temperature has caused damage to the asphalt structure and the addition of antioxidant componentes can be a protection strategy. The objective of this work was to investigate the protective effect of lemon extract in asphalt samples challenged at high temperatures by incubation in a greenhouse at 120 ° C. The sample were divided into A1 (extract 5%) and A2 (extract 3,33%), A3 (extract 1,67%) and A4 control (extract 0%) groups. Some were treated with Taiti lemon extract (Citrusaurantifolia) to verify termo-protection. Chemical and physical properties as well as compressive strength test (MPa) were performed, and the statistic was performed by the Origin 7.0 program, at p <0.05. The A3 group treated with 1.6% of extract showed compressive strength (15.25 MPa) 24% more than control group (12.31 MPa). The data indicate that 1.6% of lemon extract added to machined asphalt adds greater compressive strength (MPa) to samples subjected to high temperatures.