本文關(guān)鍵詞： 橡膠粉 瀝青 正交試驗(yàn) 性能優(yōu)化 作用機(jī)理　出處：《公路工程》2014年04期 　論文類型：期刊論文

【摘要】：以橡膠粉的目數(shù)、摻量、瀝青拌和時(shí)間和拌和溫度作為4個(gè)評(píng)價(jià)因素,建立4因素3水平正交試驗(yàn)配比方案,采用各因素水平下的改性瀝青的針入度、軟化點(diǎn)、延伸度、彈性恢復(fù)以及布氏旋轉(zhuǎn)黏度五個(gè)指標(biāo)評(píng)價(jià)瀝青性能,并分析了各因素在橡膠瀝青中的作用機(jī)理。結(jié)果表明:40目橡膠粉在摻量為25%,拌和溫度為195℃攪拌1 h得到的改性瀝青的性能最好。通過橡膠粉物理膨脹與化學(xué)脫硫作用,在合理的橡膠粉目數(shù)、摻量、攪拌時(shí)間以及攪拌溫度下,瀝青的塑性和黏性得到提高,改善了瀝青的溫度敏感性和耐老化性能。
[Abstract]:Taking the number of rubber powder, the amount of asphalt, the mixing time and temperature of asphalt as four evaluation factors, the orthogonal experiment scheme of 4 factors and 3 levels was established, and the penetration and softening point of modified asphalt were adopted under each factor level. The properties of asphalt were evaluated by the five indexes of extensibility, elastic recovery and Brinell rotation viscosity, and the action mechanism of each factor in rubber asphalt was analyzed. The results showed that the content of rubber powder was 25%. The performance of modified asphalt obtained by mixing at 195 鈩，

本文編號(hào)：1478151