本文關(guān)鍵詞： 橡膠瀝青 流變性能 正交試驗(yàn) 路用性能 動態(tài)模量　出處：《武漢理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：廢橡膠粉改性瀝青及其混合料在減薄路面、延長路面使用壽命、延緩反射裂縫、減輕行車噪聲等方面具有獨(dú)特的優(yōu)勢。將橡膠瀝青制備成固體復(fù)合型膠粉改性瀝青膠漿（A），可在常溫下運(yùn)輸、儲存和使用，很好的解決了橡膠瀝青儲存穩(wěn)定性以及能耗的問題。但是，由于國內(nèi)外使用環(huán)境、路面材料及結(jié)構(gòu)組成的差異，國內(nèi)對復(fù)合型膠粉改性瀝青膠漿及其混合料的性能缺乏認(rèn)識，本文針對這一問題開展深入的研究，對于推動復(fù)合型膠粉改性瀝青膠漿在我國公路工程中的應(yīng)用，具有重要的意義。 本文首先對美國X公司研制的復(fù)合型膠粉改性瀝青膠漿（A）的組成結(jié)構(gòu)進(jìn)行了測試分析。通過紅外光譜及熱重分析，，研究發(fā)現(xiàn)A的無機(jī)分占總質(zhì)量的50%左右，常溫儲存穩(wěn)定，其改性是以物理共混反應(yīng)為主，并伴有化學(xué)反應(yīng)發(fā)生。 然后通過Brookfield粘度試驗(yàn)以及動態(tài)剪切流變試驗(yàn)，測試分析了A的流變性能。試驗(yàn)結(jié)果表明，與SBS改性瀝青相比，A明顯改善了瀝青在高溫下的穩(wěn)定性，并提高了低溫抗裂性能，同時降低了瀝青的溫度敏感性。 接著通過馬歇爾試驗(yàn)方法法，確定了A瀝青混合料的油石比與級配。根據(jù)正交試驗(yàn)設(shè)計(jì)方法，確定最適合A瀝青混合料密集配的成型工藝：將集料加熱到200℃，將拌鍋溫度設(shè)置為195℃，加入A拌合90s，再加入礦粉拌合90s，將混合料在170℃壓實(shí)成型。 最后對A瀝青混合料的高溫性能、低溫性能、水穩(wěn)定性能以及動態(tài)模量與SBS改性瀝青混合料進(jìn)行了對比研究。結(jié)果表明其高溫穩(wěn)定性弱于SBS改性瀝青混合料，而低溫抗裂性能與水穩(wěn)定性能皆優(yōu)于SBS改性瀝青混合料。通過對不同級配、不同溫度、不同荷載頻率的瀝青混合料動態(tài)模量分析發(fā)現(xiàn)：A瀝青混合料以及SBS改性瀝青混合料動態(tài)模量隨著頻率的增加（溫度的降低）而增大。并且低中頻高中溫段，A瀝青混合料的動態(tài)模量要大于SBS改性瀝青混合料，在高頻低溫段，兩者相近。并且CAM模型能很好的描述混合料的動態(tài)模量主曲線。
[Abstract]:The waste rubber powder modified asphalt and its mixture are thinning the pavement, prolonging the service life of the pavement and delaying the reflection crack. The rubber asphalt is prepared into solid compound rubber powder modified asphalt paste, which can be transported, stored and used at room temperature. The stability of rubber asphalt storage and energy consumption are well solved. However, due to the domestic and foreign use environment, pavement materials and structure of the difference. There is a lack of understanding on the performance of compound rubber powder modified asphalt mortar and its mixture in our country. This paper aims at this problem to carry out in-depth research, which will promote the application of compound rubber powder modified asphalt mortar in highway engineering in China. It is of great significance. In this paper, the composition and structure of compound rubber powder modified asphalt mortar (A) developed by X Company of USA were tested and analyzed by infrared spectrum and thermogravimetric analysis. It was found that the inorganic fraction of A was about 50% of the total mass, and the storage at room temperature was stable. The modification of A was mainly physical blending reaction and accompanied by chemical reaction. Then the rheological properties of A were tested and analyzed by Brookfield viscosity test and dynamic shear rheological test. The results showed that the rheological properties of A modified asphalt were compared with those of SBS modified asphalt. A obviously improves the stability of asphalt at high temperature, improves its cracking resistance at low temperature, and reduces the temperature sensitivity of asphalt. Then the asphalt mixture ratio and gradation of A asphalt mixture are determined by Marshall test method, according to the orthogonal test design method. The most suitable forming process for A asphalt mixture is to heat the aggregate to 200 鈩

本文編號：1474376