本文選題：摻RM瀝青　切入點(diǎn)：SBS改性瀝青　出處：《武漢理工大學(xué)》2014年碩士論文

【摘要】：在目前內(nèi)外高速公路建設(shè)中，使用最為廣泛的是SBS改性瀝青路面。SBS是一種石油產(chǎn)物，SBS改性瀝青的大量使用，導(dǎo)致了SBS價(jià)格昂貴和不可再生性等問(wèn)題。橡膠瀝青因其具有良好的性能，已經(jīng)在國(guó)內(nèi)外高速公路中推廣應(yīng)用，橡膠瀝青的儲(chǔ)存穩(wěn)定性和運(yùn)輸、使用過(guò)程中的高能耗一直制約著橡膠瀝青的發(fā)展。本文以新型橡膠改性劑RM作為外摻劑，制備了摻橡膠改性劑瀝青和摻RM瀝青混合料，并對(duì)其性能進(jìn)行評(píng)價(jià)，同時(shí)對(duì)摻RM瀝青和SBS改性瀝青的性能、瀝青混合料的路用性能和經(jīng)濟(jì)性能進(jìn)行了研究評(píng)價(jià)，主要研究工作包括： 首先對(duì)摻RM瀝青、SBS改性瀝青和70#基質(zhì)瀝青進(jìn)行性能分析，就三大指標(biāo)、流變性能和粘彈性力學(xué)相應(yīng)對(duì)三種瀝青進(jìn)行比較分析。三大指標(biāo)試驗(yàn)的結(jié)果表明，RM可以明顯改善瀝青的基本性能；DSR試驗(yàn)結(jié)果表明，RM的摻入對(duì)瀝青的流變性能影響較為復(fù)雜，在高溫時(shí)摻RM可以是瀝青的復(fù)合模量增大，相位角降低；在低溫階段，RM使得瀝青的復(fù)合模量降低，相位角增大。結(jié)果表明摻入RM瀝青的抗車(chē)轍性能、中低溫抗疲勞性能和溫度敏感性都有不同程度的改善，其中對(duì)高溫性能的影響尤為明顯。通過(guò)高溫蠕變?cè)囼?yàn)和低溫應(yīng)力松弛試驗(yàn)可知，，B能提升瀝青的蠕變恢復(fù)量和縮短瀝青的松弛時(shí)間。 第二，對(duì)摻RM瀝青混合料、SBS改性瀝青混合料和基質(zhì)瀝青混合料進(jìn)行水穩(wěn)性能、高溫性能和低溫性能進(jìn)行研究，試驗(yàn)結(jié)果表明摻RM瀝青混合料的水穩(wěn)性能較SBS改性瀝青略差，RM的摻入使得瀝青的動(dòng)穩(wěn)定度提高，相對(duì)變形量減少。摻RM瀝青混合料的低溫抗裂性?xún)?yōu)于基質(zhì)瀝青混合料，比SBS改性瀝青混合料略差。 第三，采用Superpave簡(jiǎn)單性能試驗(yàn)方法研究了三種瀝青混合料的動(dòng)態(tài)模量和疲勞性能。研究結(jié)果表明：瀝青混合料動(dòng)態(tài)模量和相位角具有明顯的頻率和溫度依賴(lài)性，RM的摻入能提高瀝青混合料的動(dòng)態(tài)模量，摻RM的瀝青混合料粘彈性能要優(yōu)于SBS改性瀝青混合料；采用時(shí)溫等效效應(yīng)得到瀝青混合料的動(dòng)態(tài)模量主曲線(xiàn)，RM的摻入能降低瀝青混合料的溫度敏感性；瀝青混合料的動(dòng)態(tài)模量與相位角的關(guān)系可以用半對(duì)數(shù)模型來(lái)表征；RM摻入后瀝青混合料的疲勞壽命得到明顯的改善，其改善效果在較高應(yīng)變水平下表現(xiàn)更加顯著，摻RM瀝青混合料的疲勞性能在低應(yīng)變水平下比SBS改性瀝青混合料要略差，在高應(yīng)變水平下兩種瀝青混合料的疲勞性能基本一致。經(jīng)過(guò)成本分析，本文研究下的RM的摻量可以在混合料功能與SBS改性瀝青混合料基本保持一致的前提下，降低瀝青混合料的成本。
[Abstract]:In the current highway construction, the most widely used is the SBS modified asphalt pavement, which is a kind of petroleum product. Because of its good performance, rubber asphalt has been widely used in expressway at home and abroad, the storage stability and transportation of rubber asphalt, The development of rubber asphalt has been restricted by high energy consumption. In this paper, a new rubber modifier, RM, is used as the admixture to prepare rubber modifier asphalt and RM asphalt mixture, and its performance is evaluated. At the same time, the performance of modified asphalt mixed with RM and SBS, the road performance and economic performance of asphalt mixture are studied and evaluated. The main research work includes:. First of all, the performance of SBS modified asphalt and 70# base asphalt mixed with RM asphalt were analyzed, and the three indexes were analyzed. The three kinds of asphalt were compared and analyzed by rheological property and viscoelastic mechanics. The results of three index tests show that RM can obviously improve the basic properties of asphalt. The results of DSR test show that the influence of the addition of RM on the rheological properties of asphalt is more complex. At high temperature, adding RM can increase the composite modulus of asphalt, decrease the phase angle, decrease the composite modulus and increase the phase angle of asphalt at low temperature. Moderate and low temperature fatigue resistance and temperature sensitivity have been improved in varying degrees. The creep test and stress relaxation test show that the creep recovery of asphalt can be increased and the relaxation time of asphalt can be shortened. Secondly, the water stability, high temperature and low temperature performance of SBS modified asphalt mixture and matrix asphalt mixture mixed with RM asphalt mixture are studied. The test results show that the water stability of the asphalt mixture mixed with RM is a little worse than that of the modified asphalt with SBS. The dynamic stability of the asphalt is improved and the relative deformation is reduced. The low temperature crack resistance of the asphalt mixture mixed with RM is better than that of the base asphalt mixture. It is a little worse than SBS modified asphalt mixture. Third, The dynamic modulus and fatigue properties of three kinds of asphalt mixtures are studied by Superpave simple performance test method. The results show that the dynamic modulus and phase angle of asphalt mixture have obvious frequency and temperature dependence. Improve the dynamic modulus of asphalt mixture, The viscoelastic energy of asphalt mixture mixed with RM is better than that of SBS modified asphalt mixture, and the temperature sensitivity of asphalt mixture can be reduced by adopting the equivalent effect of time temperature to obtain the dynamic modulus of asphalt mixture. The relationship between dynamic modulus and phase angle of asphalt mixture can be represented by semi-logarithmic model to show that the fatigue life of asphalt mixture after mixing with RM is obviously improved, and the improvement effect is more remarkable at higher strain level. The fatigue performance of RM mixed asphalt mixture is slightly worse than that of SBS modified asphalt mixture at low strain level, and the fatigue performance of two kinds of asphalt mixture is basically the same at high strain level. In this paper, the content of RM can reduce the cost of asphalt mixture on the premise that the function of mixture is consistent with that of SBS modified asphalt mixture.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U414

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 張西棉;;淺談橡膠瀝青混合料生產(chǎn)配合比控制[J];山西建筑;2010年36期

本文編號(hào)：1696559