ABSTRACT
Aiming at the joint disease problem of cement concrete pavement of airport, to further improve the basic performance of styrene acrylic emulsion cement composite pavement joint sealant, the effects of cement ratio on the performance and bonding properties of styrene acrylic emulsion cement composite pavement joint were studied using leveling test, pouring consistency test, elongation bonding test, scanning electron microscope test and mercury injection test. The leveling property, pouring consistency and elastic recovery rate were tested. Combined with a scanning electron microscope experiment and a mercury injection hole test, the micro modification mechanism was revealed. The results show that with the increase in cement ratio, the elastic recovery rate of the joint filler decreases, and the pouring consistency of the joint filler increases gradually, but the overall increase is small, and the pouring consistency values of each group of joint filler are less than 10 s. A proper increase in the cement ratio is conducive to reducing the number and size of pores in the joint filler and improving the pore size distribution. This will improve the density of the sealant and increase the working and setting bonding properties of the styrene-acrylic emulsion cement composite.
