Research on Performance of BRA Modified Asphalt

Abstract

For estimating the performance indexes of Buton rock asphalt (BRA) modified asphalt and the influence of different Buton asphalt content on the property of BRA modified asphalt, an indoor pitch performance index experiment was carried out. The test study uses Buton asphalt as the modifier, and the percentage of Buton asphalt relative to the total asphalt is used as the mixing ratio (namely internal mixing method), with 5% as the interval, select 10%, 15%, 20%, 25% and 30% five blending ratios to prepare BRA modified pitch. In addition, related tests will be done on the prepared BRA modified asphalt, and the high temperature property, low temperature property and durability of Buton asphalt modified pitch were evaluated. The analysis of the test results shows that the function of the BRA modified asphalt prepared by adding the base asphalt to Buton asphalt has changed. With the increase of Buton asphalt content, the high temperature property of BRA modified asphalt is significantly improved, but the low temperature property decreases with the increase of the content, and the durability performance is roughly the same as that of the unmodified matrix asphalt.