發(fā)布時間：2018-06-22 06:29

  本文選題：廢膠粉 + 改性瀝青�。� 參考：《武漢科技大學(xué)》2014年碩士論文

【摘要】：石油瀝青被廣泛應(yīng)用在交通運輸業(yè)(道路、鐵路、航空)、建筑業(yè)、工業(yè)等各部門，但由于其自身的缺陷，如高溫易軟化，低溫易脆裂，耐老化、抗疲勞等性能不太理想，因此，用聚合物來改善瀝青性能是十分有效的途徑，這其中廢膠粉改性瀝青又因其性能優(yōu)越、資源豐富、價格便宜、加工工藝簡單且能消除“黑色污染”等優(yōu)點逐漸成為國內(nèi)外研究的重點。 本文通過分析瀝青的常規(guī)試驗結(jié)果，探討了材料因素(廢膠粉粒徑、摻量、改性劑1,2-聚丁二烯和C5石油樹脂配比、SBS摻量)和改性工藝因素(剪切時間和剪切溫度)對瀝青性能的影響；采用紅外光譜(IR)、熒光顯微鏡和差示掃描量熱儀(DSC)等現(xiàn)代分析測試方法對比分析了基質(zhì)瀝青、廢膠粉改性瀝青、廢膠粉復(fù)合改性瀝青的紅外光譜圖以及廢膠粉和瀝青之間相容性和溫度穩(wěn)定性，并進一步探討了廢膠粉改性瀝青的作用機理。 經(jīng)過分析研究，得出如下主要結(jié)論： （1）隨著廢膠粉摻量的增加，廢膠粉改性瀝青的針入度下降、軟化點升高、延度增加，且廢膠粉摻量在15%左右時性能最佳； （2）在一定的范圍內(nèi)，廢膠粉粒徑越細(xì)，空間表面積越大，對瀝青的改性效果越好，綜合考慮成本和瀝青性能，最佳的廢膠粉粒徑為在80目左右； （3）化學(xué)改性劑(1,2-聚丁二烯和C5石油樹脂)和SBS都能改善瀝青的性能，且二者的最佳摻量均為6%左右。對比分析化學(xué)改性劑和SBS對廢膠粉改性瀝青性能的影響，可以得出它們對廢膠粉改性瀝青的改性效果相當(dāng)，因此，可以考慮用化學(xué)改性劑來部分替代SBS； （4）剪切溫度和剪切時間對廢膠粉改性瀝青的性能影響較大，當(dāng)剪切溫度在160℃左右，剪切時間約為1h時，廢膠粉改性瀝青的改性效果最好； （5）由紅外光譜圖可知，瀝青中摻入廢膠粉后，既發(fā)生了化學(xué)改性作用，又發(fā)生了物理溶解、溶脹作用，廢膠粉在一定程度上改變了瀝青的結(jié)構(gòu)，因而對瀝青性能影響明顯；熒光顯微鏡采集的圖像表明，廢膠粉同時具有吸附和填充雙重作用；差示掃描量熱DSC曲線表明，，化學(xué)改性劑-廢膠粉復(fù)合改性瀝青的吸熱量或放熱量最少，廢膠粉改性瀝青次之；廢膠粉復(fù)合改性瀝青的溫度穩(wěn)定性高于基質(zhì)瀝青，且高于廢膠粉改性瀝青。
[Abstract]:Petroleum asphalt is widely used in transportation (road, railway, aviation), construction, industry and other sectors, but because of its own defects, such as high temperature softening, low temperature brittle, aging resistance, fatigue and other performance is not ideal, It is a very effective way to improve asphalt performance by using polymer, among which waste rubber powder modified asphalt is cheap because of its superior performance, abundant resources and low price. The advantages of simple processing technology and eliminating "black pollution" have gradually become the focus of research at home and abroad. Based on the analysis of the conventional test results of asphalt, the material factors (particle size and content of waste rubber powder) are discussed in this paper. The effects of modifier 1 (2) -polybutadiene and C _ 5 petroleum resin (SBS) and modified process factors (shear time and shear temperature) on asphalt properties; The matrix asphalt and waste rubber powder modified asphalt were compared and analyzed by infrared spectroscopy (IR), fluorescence microscope and differential scanning calorimeter (DSC). The infrared spectrum of waste rubber powder composite modified asphalt, the compatibility and temperature stability between waste rubber powder and asphalt, and the action mechanism of waste rubber powder modified asphalt were discussed. The main conclusions are as follows: (1) with the increase of waste rubber powder content, the penetration of asphalt modified by waste rubber powder decreases, the softening point increases and the ductility increases, and the performance of waste rubber powder is the best when the content of waste rubber powder is about 15%; (2) in a certain range, the smaller the particle size of waste rubber powder and the larger the space surface area, the better the modification effect of asphalt is. Considering the cost and asphalt performance, the best particle size of waste rubber powder is about 80 mesh; (3) the properties of asphalt can be improved by chemical modifiers (1 / 2-polybutadiene and C _ (5) petroleum resin) and SBS, and the optimum content of both of them is about 6%. By comparing the effects of chemical modifiers and SBS on the properties of asphalt modified by waste rubber powder, it can be concluded that their modification effects on asphalt modified by waste rubber powder are similar. Therefore, we can consider using chemical modifiers to partly replace SBS; (4) Shear temperature and shearing time have great influence on the properties of asphalt modified by waste rubber powder. When the shear temperature is about 160 鈩

本文編號：2051932