本文選題：CRP改性瀝青 + 干法CRP改性瀝青混合料��； 參考：《重慶交通大學(xué)》2016年碩士論文

【摘要】：廢舊塑料改性劑CRP是以廢舊塑料為原材料加工制成,其干法改性瀝青混合料的拌制是在適當(dāng)拌合溫度下,將CRP改性劑直接摻入到拌和好的混合料中,拌合一定的時(shí)間,最后在與礦粉拌合后拌制而成。它的出現(xiàn)不僅可以保證干法改性瀝青混合料具備較好的高溫穩(wěn)定性、低溫抗裂性和水穩(wěn)定性等路用性能,還可以在一定程度上解決廢舊塑料改性瀝青離析嚴(yán)重、儲(chǔ)存穩(wěn)定性差的問題。本文圍繞干法CRP在瀝青混合料中的熔融狀態(tài)與分散性以及干法CRP改性瀝青混合料的路用性能進(jìn)行研究,取得的主要研究成果如下:(1)選用A70#瀝青、B70#瀝青、C70#瀝青和韓國(guó)SK-70#四種基質(zhì)瀝青,通過針入度、軟化點(diǎn)和布式粘度等室內(nèi)試驗(yàn)對(duì)不同摻量CRP改性瀝青的性能進(jìn)行試驗(yàn)測(cè)試,結(jié)果表明,CRP在不同基質(zhì)瀝青中的分散性不同,即CRP對(duì)不同基質(zhì)瀝青的改性效果不同,相比而言,CRP改性韓國(guó)SK-70#瀝青效果更好。(2)通過CRP干法改性的熔融試驗(yàn),針對(duì)同一種集料(13.2mm+9.5mm石灰?guī)r),對(duì)比研究了集料加熱溫度、CRP粒徑、拌合時(shí)間對(duì)CRP與集料熔融效果的影響,結(jié)果表明,CRP基本完全熔融成薄膜狀包裹在集料表面所需的最佳集料加熱溫度為180℃;2.36mm粒徑的CRP干法改性瀝青混合料的最佳干拌時(shí)間為30s,1.18mm、0.6mm、0.3mm粒徑的CRP干法改性瀝青混合料的最佳干拌時(shí)間為20s。(3)通過室內(nèi)拌制以及試驗(yàn)路現(xiàn)場(chǎng)取料瀝青混合料的抽提回收瀝青針入度、軟化點(diǎn)等常規(guī)性能試驗(yàn),研究了干法CRP在瀝青中的分散性以及其改性效果,結(jié)果表明,干法CRP能夠在瀝青中均勻分散,干法CRP對(duì)瀝青混合料的改性效果顯著。(4)通過韓國(guó)SK-70#基質(zhì)瀝青、濕法5.5%CRP改性瀝青和干法CRP改性瀝青混合料(干拌時(shí)間20s、5.5%CRP摻量)回收瀝青的熱重分析(TG)、DSC試驗(yàn),結(jié)果表明,干法CRP在瀝青中的均勻分散改善了瀝青及瀝青混合料的高溫性能,并在上述研究基礎(chǔ)上,研究總結(jié)了干法CRP改性瀝青混合料的改性機(jī)理。(5)通過干法CRP改性的AC-13瀝青混合料的馬歇爾穩(wěn)定度、車轍、凍融劈裂、低溫彎曲等試驗(yàn)研究了干法CRP改性瀝青混合料的高溫穩(wěn)定性、低溫抗裂性、抗水損害能力。結(jié)果表明,干法CRP能明顯改善瀝青混合料的高溫性能、低溫抗裂性、抗水損害能力等路用性能。本次研究成果對(duì)干法CRP改性瀝青混合料施工工藝與應(yīng)用有一定實(shí)用價(jià)值。
[Abstract]:Waste plastic modifier CRP is made from waste plastics as raw material. The mixing of dry modified asphalt mixture is to mix CRP modifier directly into the mixed mixture at proper mixing temperature, and mix it for a certain time. Finally, after mixing with ore powder, mix it up. Its appearance can not only guarantee the high temperature stability, low temperature crack resistance and water stability of dry modified asphalt mixture, but also solve the serious segregation of waste plastic modified asphalt to some extent. Poor storage stability. The melting state and dispersity of dry CRP in asphalt mixture and the pavement performance of dry CRP modified asphalt mixture are studied in this paper. The main research results obtained are as follows: (1) A _ 70# asphalt / B _ 70# asphalt / C _ 70# asphalt and Korean SK-70# _ based asphalt are selected to test the performance of CRP modified asphalt with different content by laboratory tests such as penetration, softening point and viscosity. The results show that the dispersion of CRP in different matrix asphalt is different, that is, the effect of CRP on different matrix asphalt is different, compared with the effect of CRP modified Korean SK-70# asphalt is better. The effects of heating temperature, particle size and mixing time on the melting effect of CRP and aggregate were studied comparatively for the same type of aggregate (13.2 mm 9.5mm limestone). The results show that the optimum heating temperature of CRP dry modified asphalt mixture is 180 鈩，

本文編號(hào)：1903527