路用生物瀝青及混合料性能研究
發(fā)布時(shí)間:2019-03-10 18:12
【摘要】:選擇以木屑為原材料生產(chǎn)出的生物質(zhì)重油,將其加入50號(hào)基質(zhì)瀝青,并摻入外摻劑,制備不同生物質(zhì)重油摻量的生物瀝青,對RTFO老化前后生物瀝青樣品的針入度、軟化點(diǎn)、延度(10℃)、質(zhì)量變化進(jìn)行分析,通過結(jié)合料試驗(yàn)優(yōu)選出符合規(guī)范要求的生物瀝青結(jié)合料,然后制備生物瀝青混合料并對其進(jìn)行車轍試驗(yàn)、凍融劈裂試驗(yàn)、小梁彎曲試驗(yàn)和低溫黏結(jié)性試驗(yàn)等,考察生物質(zhì)重油摻量變化對生物瀝青混合料路用性能的影響。結(jié)果表明:隨著生物質(zhì)重油摻量的增加,生物瀝青的針入度增加、軟化點(diǎn)降低、延度增加,高溫性能受到一定程度的影響,但低溫抗裂性能得到提高;與50號(hào)基質(zhì)瀝青混合料相比,生物質(zhì)重油摻量(w)為10%的生物瀝青混合料的最大彎拉應(yīng)變比提高20.90%,低溫性能有所提高,凍融循環(huán)后的劈裂抗拉強(qiáng)度提高12.56%,水穩(wěn)定性有所提高,黏附性能大幅提高,高溫性能有所降低;生物質(zhì)重油摻量(w)為10%的生物瀝青混合料的各項(xiàng)指標(biāo)均滿足《公路工程瀝青及瀝青混合料試驗(yàn)規(guī)程》(JTG E20—2011)的要求。
[Abstract]:The biomass heavy oil produced with sawdust as raw material was added into No. 50 base asphalt, and the bio-bitumen with different amount of biomass heavy oil was prepared. The penetration and softening point of bio-asphalt samples before and after aging of RTFO were studied. The ductility (10 鈩,
本文編號(hào):2437865
[Abstract]:The biomass heavy oil produced with sawdust as raw material was added into No. 50 base asphalt, and the bio-bitumen with different amount of biomass heavy oil was prepared. The penetration and softening point of bio-asphalt samples before and after aging of RTFO were studied. The ductility (10 鈩,
本文編號(hào):2437865
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