本文選題：巖瀝青　切入點(diǎn)：改性瀝青　出處：《長(zhǎng)沙理工大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著我國(guó)經(jīng)濟(jì)的飛速發(fā)展,交通量也隨之越來(lái)越大,且往往超載嚴(yán)重,車(chē)轍、水損害等早期路面破壞現(xiàn)象也越加頻繁,普通道路瀝青已無(wú)法滿足路面對(duì)材料性能的要求。巖瀝青作為一種天然改性劑,在我國(guó)道路建設(shè)中逐漸得到關(guān)注及應(yīng)用,但在其混合料路用性能方面,仍然缺乏全面、系統(tǒng)的研究,為了巖瀝青改性劑進(jìn)一步的應(yīng)用推廣,在巖瀝青合理?yè)搅?施工工藝等方面仍需更加深入的研究。本文對(duì)巖瀝青進(jìn)行了四組分試驗(yàn),試驗(yàn)結(jié)果表明與普通道路瀝青相比,巖瀝青具有相對(duì)較高的瀝青質(zhì)含量及較低的膠質(zhì)含量,油分也略有降低。巖瀝青具有分子量大、軟化點(diǎn)高,極性較強(qiáng)的特點(diǎn)。為研究巖瀝青摻量對(duì)改性瀝青性能的影響,對(duì)不同摻量下巖改性瀝青進(jìn)行了常規(guī)試驗(yàn)及SHRP試驗(yàn),試驗(yàn)結(jié)果表明,摻入巖瀝青可有效改善基質(zhì)瀝青的使用性能,隨巖瀝青摻量的增加,改性瀝青的感溫性降低,高溫穩(wěn)定性及抗老化性能增,與此同時(shí),其低溫抗裂性能有所降低,但若將巖瀝青摻量控制在合理范圍內(nèi),并不會(huì)對(duì)改性瀝青低溫抗裂性能造成過(guò)大的影響,根據(jù)改性瀝青性能隨摻量的變化規(guī)律,初步推薦巖瀝青摻量為10%~30%(巖瀝青中天然瀝青與基質(zhì)瀝青的質(zhì)量百分比)。通過(guò)車(chē)轍試驗(yàn)、低溫彎曲試驗(yàn)及凍融劈裂試驗(yàn)等,檢驗(yàn)巖改性瀝青混合料的路用性能,并根據(jù)動(dòng)穩(wěn)定度及破壞應(yīng)變等性能指標(biāo),最終確定巖瀝青的合理?yè)搅繛?.5%~3.5%(巖瀝青占混合料的質(zhì)量百分比)。巖改性瀝青混合料與SBS改性瀝青混合料的性能對(duì)比試驗(yàn)表明巖改性瀝青混合料具有與SBS改性瀝青混合料相當(dāng)?shù)母邷馗男孕Ч?且具有更加優(yōu)異的抗老化性。本文依托靖西-那坡高速巖瀝青試驗(yàn)路,對(duì)巖改性瀝青混合料的施工工藝及其質(zhì)量控制要點(diǎn)進(jìn)行了介紹,并著重研究了巖改性瀝青混合料的拌和工藝及碾壓遍數(shù)對(duì)路面壓實(shí)的影響。通過(guò)適宜摻量下巖改性瀝青及SBS改性瀝青的單價(jià)對(duì)比,對(duì)巖改性瀝青的經(jīng)濟(jì)效益進(jìn)行了分析。研究結(jié)果可為巖瀝青的進(jìn)一步應(yīng)用推廣提供有價(jià)值的技術(shù)參考。
[Abstract]:With the rapid development of economy in our country, the traffic volume is also increasing, and often overloading, rutting, water damage and other early road damage phenomenon is more and more frequent. Rock asphalt, as a natural modifier, has been paid more and more attention to and applied in the road construction of our country, but it still lacks of comprehensive performance in road performance. In order to promote the application of rock asphalt modifier, it is necessary to further study the reasonable content of rock asphalt and the construction technology, etc. In this paper, a four-component test is carried out on rock asphalt. The results show that rock asphalt has relatively higher asphaltene content and lower glial content, and its oil content is slightly lower than that of ordinary road asphalt, and rock asphalt has high molecular weight and high softening point. In order to study the influence of rock asphalt content on the performance of modified asphalt, the conventional test and SHRP test of rock modified asphalt with different content were carried out. The experimental results showed that the performance of matrix asphalt could be improved effectively by adding rock asphalt. With the increase of rock asphalt content, the temperature sensitivity of modified asphalt decreases, the high temperature stability and aging resistance of modified asphalt increase, at the same time, the low temperature cracking resistance of modified asphalt decreases, but if the content of rock asphalt is controlled within a reasonable range, It does not have too much effect on the low temperature crack resistance of modified asphalt. According to the law of the change of modified asphalt performance with the content of modified asphalt, it is preliminarily recommended that the quantity of rock asphalt admixture is 10% or 30% (mass percentage of natural asphalt and base asphalt in rock asphalt). Through rutting test, Low temperature bending test and freeze-thaw splitting test are used to test the pavement performance of rock modified asphalt mixture, and according to dynamic stability and failure strain, Finally, the reasonable content of rock asphalt was determined to be 2.5% and 3.5.The performance comparison test between rock modified asphalt mixture and SBS modified asphalt mixture showed that rock modified asphalt mixture had the same quality as SBS modified asphalt mixture. The mixture has the equivalent effect of high temperature modification, This paper introduces the construction technology and quality control points of rock modified asphalt mixture based on Jingxi-Napo high-speed rock asphalt test road. The effects of mixing technology of rock modified asphalt mixture and the number of compaction times on pavement compaction are studied emphatically. Through the comparison of unit price of rock modified asphalt and SBS modified asphalt, The economic benefits of rock modified asphalt are analyzed. The results can provide a valuable technical reference for the further application and popularization of rock asphalt.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U414

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本文編號(hào)：1575203