【摘要】：隨著社會(huì)經(jīng)濟(jì)的增長(zhǎng),我國(guó)道路運(yùn)輸業(yè)呈跨越式發(fā)展。在整個(gè)城市道路和公路形成的道路網(wǎng)中,絕大部分是瀝青路面。而瀝青路面在使用初期就會(huì)出現(xiàn)一些微小開裂和損傷,加上周圍復(fù)雜環(huán)境的影響,長(zhǎng)期使用后,路面的疲勞壽命和性能退化。事實(shí)上,已有研究成果充分證實(shí)了瀝青材料具有一定的疲勞損傷愈合能力,瀝青及瀝青混合料的損傷愈合性能研究得到了國(guó)外道路科研工作者的廣泛關(guān)注。為了研究熱老化后瀝青膠漿的自愈合能力,理解其自愈合機(jī)理,本文著重考慮內(nèi)蒙古地區(qū)常用的基質(zhì)瀝青,SBS改性瀝青,膠粉改性瀝青三種瀝青與填料結(jié)合形成的瀝青膠漿在受到外界環(huán)境影響下發(fā)生熱老化后的自我修復(fù)特性,采用宏、細(xì)觀力學(xué)試驗(yàn)手段相結(jié)合,考察瀝青材料的損傷及愈合特性,并找出影響愈合的主要因素,努力尋求損傷自愈的評(píng)價(jià)指標(biāo),為瀝青材料的設(shè)計(jì)和改進(jìn)提供參考依據(jù)。利用原子力顯微鏡(AFM)反映熱老化作用下瀝青膠漿的微觀結(jié)構(gòu)變化,試驗(yàn)發(fā)現(xiàn),基質(zhì)瀝青膠漿出現(xiàn)明顯的“蜂狀結(jié)構(gòu)”,隨老化程度的增加,“蜂形結(jié)構(gòu)”逐漸變窄變長(zhǎng),較大的粉膠比會(huì)減弱瀝青膠漿的老化程度;SBS改性瀝青膠漿沒有出現(xiàn)“蜂狀結(jié)構(gòu)”,老化對(duì)SBS改性瀝青膠漿的影響小于基質(zhì)瀝青膠漿,SBS改性劑的加入會(huì)起到抑制瀝青膠漿老化的作用,膠粉改性瀝青膠漿表面粗糙,沒有出現(xiàn)“蜂形結(jié)構(gòu)”,長(zhǎng)期老化后呈現(xiàn)出分子聚集、締合的現(xiàn)象。利用動(dòng)態(tài)剪切流變儀(DSR)對(duì)瀝青膠漿進(jìn)行疲勞測(cè)試和疲勞—愈合—再疲勞試驗(yàn),并采用愈合率和能量法兩種方式評(píng)價(jià)自愈合性能,結(jié)合徠卡顯微鏡對(duì)自愈合情況進(jìn)行細(xì)觀觀測(cè)。試驗(yàn)結(jié)果表明,經(jīng)過熱老化之后瀝青膠漿疲勞壽命增加,改性瀝青膠漿具有更好的抗疲勞性能,適當(dāng)增加粉膠比有助于改善瀝青膠漿的抗疲勞性能。基質(zhì)瀝青膠漿和SBS改性瀝青膠漿的自愈合性能優(yōu)于膠粉改性瀝青膠漿,在損傷較小的情況下,愈合溫度越高,間歇期越長(zhǎng),自愈合效果越好,粉膠比為1.5時(shí),愈合效果最差,老化會(huì)降低瀝青膠漿的自愈合效果。利用彎曲梁流變儀(BBR)對(duì)瀝青膠漿進(jìn)行低溫彎曲流變?cè)囼?yàn)和熱誘導(dǎo)自愈合試驗(yàn),結(jié)果表明,對(duì)瀝青膠漿低溫流變性能影響最大的是粉膠比,其次是瀝青種類,老化程度的影響程度較小,增大粉膠比和發(fā)生熱老化都會(huì)降低瀝青膠漿的低溫抗裂性能,且隨粉膠比的增大,老化程度的加深會(huì)使自愈合效果變得更差。愈合溫度越高,愈合時(shí)間越長(zhǎng),瀝青膠漿的自愈合效果越好,膠粉改性瀝青膠漿具有更好的低溫性能和自愈合性能。建議寒冷地區(qū)選用粉膠比較小的膠粉改性瀝青膠漿作為路面材料。
[Abstract]:With the growth of social economy, the road transportation industry of our country develops by leaps and bounds. In the road network formed by the whole city road and highway, the vast majority are asphalt pavement. However, there will be some minor cracking and damage in the initial use of asphalt pavement, and the influence of the surrounding complex environment will lead to the degradation of the fatigue life and performance of the pavement after a long period of service. In fact, the existing research results have fully confirmed that asphalt materials have a certain ability of fatigue damage healing. The research on damage healing performance of asphalt and asphalt mixture has been widely concerned by foreign road researchers. In order to study the self-healing ability of asphalt paste after heat aging and to understand its self-healing mechanism, this paper focuses on the base asphalt, SBS modified asphalt, which is commonly used in Inner Mongolia. The self-repairing properties of asphalt mortar formed by three kinds of asphalt modified by rubber powder and filler after thermal aging under the influence of external environment were studied. The damage and healing characteristics of asphalt material were investigated by means of macro and meso-mechanical test. The main factors affecting healing are found out, and the evaluation index of self-healing of damage is sought, which provides a reference for the design and improvement of asphalt materials. Atomic force microscope (AFM) (AFM) was used to reflect the microstructure changes of asphalt mortar under thermal aging. It was found that the "bee shaped structure" appeared obviously in the matrix asphalt mortar, and the "bee shaped structure" became narrower and longer with the increase of aging degree. Larger powder / binder ratio will weaken the aging degree of asphalt mortar. There is no "bee structure" in SBS modified asphalt slurry, and the effect of aging on SBS modified asphalt slurry is less than that on SBS modified asphalt slurry. The addition of SBS modifier can inhibit the aging of asphalt slurry, and the surface of SBS modified asphalt slurry is rough. There is no "bee-shaped structure", the phenomenon of molecular aggregation and association appears after long-term aging. The dynamic shear rheometer (DSR) was used to test the fatigue of asphalt mortar and to evaluate the self-healing performance by means of healing rate and energy method. The self-healing was observed with Leica microscope. The results show that the fatigue life of modified asphalt mortar increases after thermal aging, and the fatigue resistance of modified asphalt mortar is improved by increasing the ratio of powder to binder. The self-healing performance of matrix asphalt paste and SBS modified asphalt slurry is better than that of rubber powder modified asphalt mortar. When the damage is small, the higher the healing temperature, the longer the interval, the better the self-healing effect, and the better the ratio of powder to binder is 1.5. The healing effect is the worst, and aging will reduce the self-healing effect of asphalt paste. The low temperature bending rheological test and heat-induced self-healing test of asphalt mortar were carried out by using (BBR). The results showed that the ratio of powder to binder was the most important, followed by the kind of asphalt, on the rheological properties of asphalt mortar at low temperature. The effect of aging degree is small, increasing the ratio of powder to binder and thermal aging will reduce the low temperature crack resistance of asphalt mortar, and with the increase of the ratio of powder and binder, the effect of self-healing will become worse with the increase of the ratio of powder and binder. The higher the healing temperature, the longer the healing time, the better the self-healing effect of asphalt paste, and the better the low-temperature and self-healing properties of asphalt mortar modified by rubber powder. It is suggested that the bitumen modified by powder in cold area should be used as pavement material.
【學(xué)位授予單位】：內(nèi)蒙古工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U414

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王明;劉黎萍;羅東;;納米尺度瀝青微觀結(jié)構(gòu)特征演化分析[J];中國(guó)公路學(xué)報(bào);2017年01期

2 湯文;資建民;呂悅晶;;瀝青自愈合行為的影響因素及評(píng)價(jià)方法[J];建筑材料學(xué)報(bào);2017年05期

3 曾廷玉;孫曉鴻;莊勝意;鄭曉晴;黃競(jìng)?cè)?楊朋;;電磁感應(yīng)加熱誘導(dǎo)瀝青路面自愈合技術(shù)[J];廣東建材;2016年12期

4 王琨;郝培文;;BBR試驗(yàn)的瀝青低溫性能及粘彈性分析[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年10期

5 易軍艷;龐驍奕;姚冬冬;許勐;馮德成;;基于原子力顯微鏡技術(shù)的瀝青與礦料表面粗糙度及黏附特性[J];復(fù)合材料學(xué)報(bào);2017年05期

6 王英園;韓珊;劉全濤;韓寧旭;蘇峻峰;;瀝青自修復(fù)材料研究進(jìn)展(Ⅰ):自修復(fù)理論研究[J];石油瀝青;2016年04期

7 何凡;唐進(jìn);劉全濤;;瀝青砂漿的熱誘導(dǎo)自愈合性能研究[J];武漢理工大學(xué)學(xué)報(bào)(交通科學(xué)與工程版);2016年04期

8 譚憶秋;符永康;紀(jì)倫;張磊;;橡膠瀝青低溫評(píng)價(jià)指標(biāo)[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2016年03期

9 鐘志鋒;郭興文;周浩;;粉膠比對(duì)橡膠瀝青膠漿高溫性能的影響研究[J];河北工程大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年01期

10 王鵬;董澤蛟;譚憶秋;劉志楊;;基于分子模擬的瀝青蜂狀結(jié)構(gòu)成因探究[J];中國(guó)公路學(xué)報(bào);2016年03期

相關(guān)博士學(xué)位論文 前6條

1 馮振剛;紫外光吸收劑對(duì)瀝青性能的影響及其作用機(jī)理研究[D];武漢理工大學(xué);2013年

2 熊銳;鹽富集條件下礦物復(fù)合纖維瀝青混合料路用性能及腐蝕損傷研究[D];長(zhǎng)安大學(xué);2012年

3 李斌;有機(jī)化蒙脫土改性瀝青的制備、性能及其改性機(jī)理研究[D];武漢理工大學(xué);2010年

4 單麗巖;基于粘彈特性的瀝青疲勞—流變機(jī)理研究[D];哈爾濱工業(yè)大學(xué);2010年

5 李平;基于膠漿特性的瀝青混合料設(shè)計(jì)[D];長(zhǎng)安大學(xué);2007年

6 詹小麗;基于DMA方法對(duì)瀝青粘彈性能的研究[D];哈爾濱工業(yè)大學(xué);2007年

相關(guān)碩士學(xué)位論文 前10條

1 韓吉偉;鹽凍循環(huán)條件下瀝青微觀結(jié)構(gòu)及流變學(xué)性能研究[D];內(nèi)蒙古工業(yè)大學(xué);2016年

2 盧章天;老化瀝青疲勞及自愈合性能評(píng)價(jià)研究[D];重慶交通大學(xué);2016年

3 王承獻(xiàn);基于能量耗散理論的POE-SBS復(fù)合改性瀝青疲勞性能研究[D];山東建筑大學(xué);2016年

4 郭康;關(guān)于PM_(2.5)影響因素的統(tǒng)計(jì)分析[D];燕山大學(xué);2014年

5 歐陽言嵩;瀝青結(jié)合料的熱老化機(jī)理研究[D];長(zhǎng)安大學(xué);2014年

6 鄭萬里;瀝青損傷愈合性能試驗(yàn)研究[D];湖南大學(xué);2014年

7 徐辰;瀝青自愈合特性及影響因素研究[D];重慶交通大學(xué);2013年

8 郭猛;瀝青膠漿的界面行為與機(jī)理分析[D];哈爾濱工業(yè)大學(xué);2012年

9 李海文;廢舊輪胎橡膠粉改性瀝青及其混合料路用性能研究[D];東北林業(yè)大學(xué);2012年

10 姜wF;瀝青膠漿自愈合能力研究[D];武漢理工大學(xué);2011年

，

本文編號(hào)：2426988