本文選題：應(yīng)力吸收層 + 改性瀝青�。� 參考：《長沙理工大學(xué)》2015年碩士論文

【摘要】：反射裂縫是舊水泥路面加鋪瀝青面層或半剛性基層瀝青路面中常見的病害之一,在舊水泥路面與瀝青加鋪層之間或半剛性基層與瀝青面層之間設(shè)置應(yīng)力吸收層是一種有效的防治反射裂縫的措施。應(yīng)力吸收層瀝青混合料的性能對防治反射裂縫效果的影響很大。本文主要研究應(yīng)力吸收層改性瀝青混合料的組成設(shè)計及其路用性能,以四種瀝青(SBS改性瀝青、Superflex改性瀝青、TPS高粘改性瀝青、橡膠瀝青)進(jìn)行對比分析,主要研究內(nèi)容如下:對選定的四種瀝青,即SBS改性瀝青、Superflex改性瀝青、TPS高粘改性瀝青及橡膠瀝青的性能技術(shù)指標(biāo)進(jìn)行試驗,并確定Superflex改性瀝青中Superflex濃縮瀝青的摻量為18%,橡膠瀝青中橡膠粉的摻量為15%。采用Superpave體積設(shè)計法進(jìn)行應(yīng)力吸收層組成設(shè)計,以空隙率為控制指標(biāo)確定目標(biāo)級配,運(yùn)用Superpave體積設(shè)計法制備試件,并測定各試件的體積性能,確定四種瀝青混合料各自的最佳油石比,運(yùn)用Superpave數(shù)學(xué)公式方法估算改性瀝青混合料的油石比,驗證改性瀝青混合料實際的瀝青用量。通過室內(nèi)試驗,主要從高溫穩(wěn)定性能、低溫抗裂性能、水穩(wěn)定性能、抗疲勞開裂性能及改性瀝青應(yīng)力吸收層與瀝青面層的整體結(jié)構(gòu)穩(wěn)定性能五個方面對應(yīng)力吸收層改性瀝青混合料的路用性能進(jìn)行研究,結(jié)果表明:應(yīng)力吸收層改性瀝青混合料具有優(yōu)良的路用性能,能有效防治反射裂縫的形成與擴(kuò)展。
[Abstract]:Reflection crack is one of the common diseases in the asphalt pavement overlaid with old cement pavement or semi-rigid base asphalt pavement. It is an effective measure to prevent reflection cracks by setting stress absorption layer between old cement pavement and asphalt overlay or between semi-rigid base and asphalt surface. The performance of stress absorbing layer asphalt mixture has great influence on the effect of preventing reflection crack. In this paper, the composition design and road performance of modified asphalt mixture with stress absorption layer are studied. Four kinds of asphalt modified by SBS modified asphalt, Superflex modified asphalt, TPS high viscosity modified asphalt and rubber asphalt, are compared and analyzed. The main contents are as follows: the performance of four kinds of asphalt, namely SBS modified asphalt, Superflex modified asphalt, TPS high viscosity modified asphalt and rubber asphalt, were tested. The content of Superflex concentrate asphalt and rubber powder in modified asphalt is 18 and 15 respectively. Superpave volume design method is used to design the composition of the stress absorption layer. The target gradation is determined by using the voidage as the control index. The volume design method of Superpave is used to prepare the specimens and the volume properties of each specimen are measured. The optimum asphalt ratio of four kinds of asphalt mixture is determined and the asphalt ratio of modified asphalt mixture is estimated by Superpave mathematical formula method to verify the actual asphalt content of modified asphalt mixture. Through laboratory tests, the stability at high temperature, crack resistance at low temperature, water stability, The fatigue cracking resistance and structural stability of modified asphalt stress absorbing layer and asphalt surface layer are studied in this paper, and the pavement performance of modified asphalt mixture with stress absorption layer is studied. The results show that the modified asphalt mixture with stress absorption layer has excellent road performance and can effectively prevent the formation and expansion of reflective cracks.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414

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