本文選題：布敦巖瀝青 + BRA改性瀝青混合料　； 參考：《長(zhǎng)沙理工大學(xué)》2014年碩士論文

【摘要】：印度尼西亞布敦巖瀝青(BRA)以其優(yōu)良的路用性能及簡(jiǎn)便的施工工藝得到越來(lái)越多的關(guān)注,但由于我國(guó)現(xiàn)行路面規(guī)范中缺少相關(guān)的應(yīng)用技術(shù)規(guī)定,從而在—定程度上制約了BRA的推廣應(yīng)用。為此,本文依托湖南省鳳大高速公路BRA改性瀝青路面試驗(yàn)段工程,開(kāi)展BRA改性瀝青混合料應(yīng)用技術(shù)的研究。1)根據(jù)依托工程實(shí)際,提出了試驗(yàn)段瀝青路面中、上面層采用BRA改性瀝青混合料的設(shè)計(jì)方案。為此,參考已有的成功經(jīng)驗(yàn),對(duì)0%～5%之間的5種BRA摻量的上面層BAC-13C與中面層BAC-20C分別進(jìn)行了目標(biāo)配合比設(shè)計(jì)。結(jié)果顯示,BRA改性瀝青混合料的最佳油石比與BRA摻量之間具有很好的線(xiàn)性關(guān)系,隨著B(niǎo)RA摻量的增加,基質(zhì)瀝青的最佳油石比逐漸減小,且礦粉的摻量也逐步減少,表明BRA可有效替代部分基質(zhì)瀝青和礦粉。2)對(duì)各BRA摻量下BRA改性瀝青混合料的目標(biāo)配合比分別進(jìn)行了路用性能檢驗(yàn),并與普通瀝青混合料的路用性能進(jìn)行了對(duì)比。結(jié)果表明,摻加BRA后,瀝青混合料的高溫穩(wěn)定性和水穩(wěn)定性能都得到了明顯改善,但低溫性能有所下降,由此確定BRA的兩種適宜摻量為3%和4%。3)根據(jù)目標(biāo)配合比設(shè)計(jì)結(jié)果,對(duì)兩種BRA適宜摻量下的BAC-13C和BAC-20C分別進(jìn)行了生產(chǎn)配合比設(shè)計(jì)與路用性能驗(yàn)證,并與主線(xiàn)SBS改性瀝青混合料進(jìn)行對(duì)比,試驗(yàn)所得結(jié)果均滿(mǎn)足規(guī)范要求,且BRA改性瀝青混合料高溫穩(wěn)定性以及水穩(wěn)定性明顯優(yōu)于SBS改性瀝青混合料,但低溫性能遜于后者。根據(jù)試驗(yàn)結(jié)果和相關(guān)資料,提出了BRA改性瀝青路面施工關(guān)鍵工藝和質(zhì)量控制方法。同時(shí),對(duì)試驗(yàn)段施工進(jìn)行了嚴(yán)格控制,并進(jìn)行了現(xiàn)場(chǎng)鉆芯取樣、室內(nèi)試樣檢測(cè)、構(gòu)造深度和滲水試驗(yàn)及現(xiàn)場(chǎng)觀測(cè)。結(jié)果表明,施工過(guò)程中拌和樓油石比以及混合料均勻性控制較好,現(xiàn)場(chǎng)施工過(guò)程組織良好,混合料的壓實(shí)效果優(yōu)良。4)通過(guò)對(duì)比分析BRA與SBS兩種改性劑的材料成本、生產(chǎn)附加成本、養(yǎng)護(hù)維修成本及社會(huì)效益可知,BRA具有更優(yōu)的經(jīng)濟(jì)性及廣闊的應(yīng)用前景。綜上所述,本文所提出的BRA改性瀝青混合料應(yīng)用技術(shù)合理可行,可為BRA改性瀝青混合料的進(jìn)一步推廣應(yīng)用提供參考。
[Abstract]:Indonesia Budun Rock Asphalt (bra) has attracted more and more attention for its excellent road performance and simple construction technology. However, due to the lack of relevant application technical regulations in the current pavement codes of our country, Therefore, the extension and application of bra are restricted to a certain extent. In this paper, based on the experimental section project of BRA modified asphalt pavement of Fengda Expressway in Hunan Province, the application technology of BRA modified asphalt mixture is studied. 1) according to the actual conditions of the supporting project, the paper puts forward the asphalt pavement of the test section. The design scheme of BRA modified asphalt mixture is used in the upper layer. According to the successful experience, the target mix ratio design of 5 kinds of BRA content BAC-13C and BAC-20C was carried out respectively. The results show that there is a good linear relationship between the optimum ratio of bitumen and the content of bra in modified asphalt mixture. With the increase of content of bra, the optimum ratio of bitumen to matrix asphalt decreases gradually, and the content of mineral powder decreases gradually. The results show that bra can replace some matrix asphalt and mineral powder effectively.) the road performance of BRA modified asphalt mixture with different content of bra is tested and compared with that of common asphalt mixture. The results show that the high temperature stability and water stability of asphalt mixture are improved obviously after adding bra, but the low temperature performance is decreased. Therefore, it is determined that the two suitable contents of bra are 3% and 4.3) according to the design results of target mix ratio, BAC-13C and BAC-20C with suitable content of bra were designed for production and road performance verified, and compared with the main line SBS modified asphalt mixture. The results met the requirements of specifications. The BRA modified asphalt mixture is superior to SBS modified asphalt mixture in high temperature stability and water stability, but its low temperature performance is inferior to the latter. According to the test results and related data, the key technology and quality control method of bra modified asphalt pavement construction are put forward. At the same time, the construction of the test section is strictly controlled, and the field drilling core sampling, indoor sample detection, structural depth and water seepage test and field observation are carried out. The results show that the ratio of asphalt to stone and the uniformity of mixture are well controlled in the construction process, the construction process is well organized and the compaction effect of the mixture is good. 4) the material cost of BRA and SBS modifier is analyzed by comparing and analyzing the material cost of BRA and SBS modifier. The additional cost of production, maintenance cost and social benefit show that bra has better economy and broad application prospect. To sum up, the application technology of BRA modified asphalt mixture proposed in this paper is reasonable and feasible, which can provide a reference for the further popularization and application of BRA modified asphalt mixture.
【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】：2014
【分類(lèi)號(hào)】：U414
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本文編號(hào)：2083848