Abstract:

The impact on the high temperature property of stone matrix asphalt mixtures using basalt and limestone aggregates were comparatively studied. Three kinds of SMA mixtures were fabricated using basalt and limestone aggregates, basalt coarse and fine aggregates named B-SMA, else limestone coarse and fine aggregates, named L-SMA, basalt coarse aggregates and limestone fine aggregates, named BL-SMA. The high temperature property of the three kinds of SMA was evaluated and the corresponding Burgers model was established through the bending creep test. Also, the effects on the high temperature proferty of the different combinations of the two kinds of aggregates were analyzed. The results indicated that B-SMA showed the best high temperature property, followed by BL-SMA and L-SMA in sequence The results of the variance analysis on bending creep rate showed that the high temperature property differences between B-SMA and BL-SMA were statistically significant. However, the differences between B-SMA and BL-SMA were insignificant.

Key words: basalt aggregate, limestone aggregate, stone mastic asphalt (SMA), bending creep, high temperature property