本文關(guān)鍵詞： 丁苯膠乳 核殼丁苯膠乳 羧基丁苯膠乳 改性乳化瀝青　出處：《大連理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著社會(huì)的發(fā)展、科技的進(jìn)步,我國的公路建設(shè)飛速發(fā)展,其中高等級(jí)公路通車?yán)锍讨鹉暝黾?已接近12萬公里。與此同時(shí)大交通流量和重載交通對(duì)路面的損壞愈發(fā)嚴(yán)重。大量的研究表明,現(xiàn)在最有效、最經(jīng)濟(jì)的維修養(yǎng)護(hù)手段就是改性乳化瀝青稀漿封層技術(shù),具有節(jié)省能源/資源、保護(hù)環(huán)境、改善施工條件、快開放交通等優(yōu)點(diǎn)。改性乳化瀝青由基質(zhì)瀝青、乳化劑和改性劑共同組成,然而改性劑是起決定作用的,實(shí)際應(yīng)用中以美德維實(shí)偉克陽離子丁苯膠乳為代表,其能較好的改善瀝青的高溫和低溫性能。經(jīng)過對(duì)改性機(jī)理的分析,本文以苯乙烯、丁二烯為共聚單體,通過熱法乳聚合成了高溫丁苯膠乳；并通過控制投料的順序與間隔時(shí)間,獲得了核殼結(jié)構(gòu)的丁苯膠乳；為了提高膠乳的粘接性能和機(jī)械穩(wěn)定性,通過添加羧基單體(丙烯酸和甲基丙烯酸甲酯)合成了羧基丁苯膠乳。實(shí)驗(yàn)中研究了反應(yīng)溫度、反應(yīng)時(shí)間、單體配比、乳化劑的用量、羧基單體的用量等對(duì)膠乳性能產(chǎn)生影響的因素。實(shí)驗(yàn)結(jié)果表明,反應(yīng)溫度60℃、反應(yīng)12h、St：Bd=25：75、單體：水=1：1、以過硫酸鉀為引發(fā)劑,以1.5份硬脂酸鈉(質(zhì)量份)與4.0份歧化松香酸鉀復(fù)配溶液為乳化劑,得到的膠乳的綜合性能較好。用陰離子膠乳制備了陰離子改性乳化瀝青,研究并確定了制備工藝：油水比60：40；陰離子乳化劑用量為總量的2%；乳化時(shí)膠乳溫度60℃～70℃,瀝青130℃～140℃；膠乳在乳化機(jī)中3000r/min,乳化1mmin；加入熱瀝青后,5000r/min乳化5mmin。近年來,隨著對(duì)改性乳化瀝青研究的深入,發(fā)現(xiàn)陽離子瀝青乳化劑比陰離子乳化劑制備的改性乳化瀝青的綜合性能更好,實(shí)驗(yàn)室試用了兩種陽離子乳化劑對(duì)膠乳進(jìn)行電性調(diào)整,實(shí)驗(yàn)結(jié)果表明：美德維實(shí)偉克陽離子乳化劑MQK與陰離子膠乳的配伍性較1831要好。以MQK制備的改性乳化瀝青的乳液均勻、穩(wěn)定,其蒸發(fā)殘留物的三大指標(biāo)均符合使用要求。當(dāng)膠乳用量為3%時(shí),所有膠乳的改性數(shù)據(jù)都接近技術(shù)要求,其中1227批次的膠乳與維實(shí)偉克膠乳更接近,它的用量為5%時(shí),軟化點(diǎn)超過60℃,顯著的改善了瀝青的高溫性能。對(duì)改性乳化瀝青蒸發(fā)殘留物的斷面進(jìn)行掃描電鏡分析,結(jié)果表明丁苯膠乳與基質(zhì)瀝青的分散性、相容性較好。
[Abstract]:With the development of society and the progress of science and technology, the highway construction in our country is developing rapidly, in which the mileage of high grade highway is increasing year by year. It is close to 120,000 kilometers. At the same time, the damage to pavement caused by heavy traffic and heavy traffic is becoming more and more serious. A lot of research shows that the most effective and economical maintenance and maintenance method is modified emulsified asphalt slurry sealing technology. The modified emulsified asphalt is composed of matrix asphalt, emulsifier and modifier, but the modifier plays a decisive role. In practical application, Devisivek cationic butadiene latex was used as a representative, which could improve the high and low temperature properties of asphalt. Through the analysis of modification mechanism, styrene and butadiene were used as copolymerization monomers. The high temperature styrene butadiene latex was polymerized by thermal emulsion, and the core-shell structure butadiene latex was obtained by controlling the feeding sequence and interval, in order to improve the adhesive property and mechanical stability of the latex, Carboxyl butadiene latex was synthesized by adding carboxyl monomer (acrylic acid and methyl methacrylate). The reaction temperature, reaction time, monomer ratio and the amount of emulsifier were studied. The experimental results show that the reaction temperature is 60 鈩，

本文編號(hào)：1515339