Development of aluminate modified mineral powder and its effect on the water stability of SBS modified AC-20C
LI Wen
MA Shengsheng
ZHENG Jianfeng
Abstract：To study the effect of aluminum ester modified mineral powder on the water stability performance of SBS modified AC-20C,limestone mineral powder is used as raw material,and aluminum ester served as the modifier.Aluminum ester modified limestone mineral powder is prepared using a chemical method,with oil absorption value and activation degree selected as evaluation indicators.An orthogonal experiment is conducted to explore the optimal modification process.The microstructural characteristics of ordinary mineral powder and aluminum ester modified mineral powder asphalt mastic are compared using fluorescence microscopy.Residual stability and freeze-thaw splitting strength tests are performed on the aluminum ester modified AC-20C specimens.The results show that the optimal modification conditions for aluminum ester modified mineral powder are a test temperature of 80 ℃,a mass fraction of aluminum ester mineral powder of 1.0％,and a modification time of 50 minutes.The activation degree of SBS modified AC-20C with aluminum ester modified mineral powder is 27.9 times that of ordinary mineral powder AC-20C,while the oil absorption value decreases by 58.7％.In terms of water stability performance,the residual stability of SBS modified AC-20C with aluminum ester modified mineral powder increases by 4.48％compared to ordinary mineral powder AC-20C,and the freeze-thaw splitting strength increases by 6.52％.Aluminum ester modified mineral powder can effectively improve the water stability performance against stripping of SBS modified AC-20C.
Keywords：asphalt mixtureAluminatelimestone mineral powdermodification conditionasphalt masticwater stability performance
Publication Date：2025-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 71-76,101 )