To evaluate the dispersive performance of aged asphalt mixture during hot in-place recycling of asphalt pavement and guarantee the hot in-place recycling construction quality

a simple and easy-doing blending and screening test was designed. By in-laboratory blending and screening tests

the influences of different heating temperatures

different blending time and recycling agents on the dispersive performances of aged asphalt mixtures were evaluated. The results indicated that

the heating temperature of 120 ℃ resulted better dispersive performance of aged asphalt mixture than 110 ℃; the blending time of 2 mins resulted better dispersive performance of aged asphalt mixture than 1 min; and the recycling agent could improve the dispersive performance of aged asphalt mixture. Thus

higher heating temperature

longer blending time and good recycling agent can improve the construction quality of hot in-place recycling asphalt pavement.