本文選題：HDPE + 膠粉��； 參考：《東北林業(yè)大學(xué)》2014年碩士論文

【摘要】：隨著公路建設(shè)的快速發(fā)展,道路工程科學(xué)技術(shù)的不斷進(jìn)步,人們對(duì)路面使用性能的要求也越來(lái)越高。反射裂縫是路面病害的主要形式之一,設(shè)置改性瀝青應(yīng)力吸收層混合料可以有效防治和延緩反射裂縫產(chǎn)生和發(fā)展,增強(qiáng)瀝青路面的使用性能,具有較好的應(yīng)用推廣前景。 為了研制出性能優(yōu)良、經(jīng)濟(jì)可行的應(yīng)力吸收層改性瀝青混合料來(lái)防治反射裂縫,采用廢舊材料加工制成的改性劑HDPE與40目膠粉摻入到90#瀝青中進(jìn)行改性,使用正交試驗(yàn)法對(duì)HDPE-膠粉改性瀝青的制備工藝開展試驗(yàn),采用灰色關(guān)聯(lián)法和綜合加權(quán)法對(duì)試驗(yàn)數(shù)據(jù)進(jìn)行分析；利用Marshall法和Superpave法設(shè)計(jì)HDPE-膠粉改性瀝青應(yīng)力吸收層混合料；并對(duì)最佳瀝青用量的HDPE-膠粉改性瀝青應(yīng)力吸收層混合料進(jìn)行路用性能評(píng)價(jià)。 研究結(jié)果表明：應(yīng)力吸收層HDPE-膠粉改性瀝青最佳的改性劑摻量為：5%的HDPE、10%的膠粉,最佳工藝參數(shù)為：剪切速率4500r/min,剪切時(shí)間25min,溫度175℃。HDPE-膠粉改性瀝青應(yīng)力吸收層混合料在砂粒式AC-5級(jí)配下的最佳瀝青用量為8.93%,采用最佳瀝青用量時(shí),HDPE-膠粉改性瀝青混合料各項(xiàng)指標(biāo)滿足應(yīng)力吸收層改性瀝青混合料的技術(shù)要求。HDPE-膠粉改性瀝青應(yīng)力吸收層混合料-10℃時(shí)的小梁彎曲試驗(yàn)最大彎拉應(yīng)變?yōu)?158με,抗彎拉強(qiáng)度為13.1MPa,具有較強(qiáng)的低溫抗變形能力,能夠防止低溫反射裂縫的產(chǎn)生；應(yīng)力吸收層實(shí)際工作溫度40℃時(shí)的車轍試驗(yàn)動(dòng)穩(wěn)定度為3217次/mm,60℃時(shí)5cm的AC-16SBS瀝青混合料加2cm應(yīng)力吸收層結(jié)構(gòu)的動(dòng)穩(wěn)定度為4713次/mm,在實(shí)際工作環(huán)境下,HDPE-膠粉改性瀝青應(yīng)力吸收層混合料具有優(yōu)良的高溫穩(wěn)定性能；浸水馬歇爾試驗(yàn)殘留穩(wěn)定度為90.4%,凍融劈裂試驗(yàn)凍融劈裂強(qiáng)度比為89.5%,具有優(yōu)良的水穩(wěn)定性能。研究結(jié)果可為HDPE-膠粉改性瀝青混合料應(yīng)力吸收層的實(shí)際應(yīng)用提供依據(jù)。
[Abstract]:With the rapid development of highway construction and the continuous progress of road engineering science and technology, people demand more and more high pavement performance. Reflection crack is one of the main forms of pavement disease. Setting up modified asphalt stress absorbing layer mixture can effectively prevent and delay the occurrence and development of reflection crack, enhance the performance of asphalt pavement, and have a good prospect of application and popularization. In order to develop an excellent and economical modified asphalt mixture with stress absorption layer to prevent the reflection crack, the modifier HDPE and 40 mesh rubber powder were added to 90# asphalt to modify the asphalt. The preparation technology of HDPE-rubber powder modified asphalt was tested by orthogonal test, the test data were analyzed by grey correlation method and comprehensive weighting method, the stress absorbing layer mixture of HDPE-rubber powder modified asphalt was designed by Marshall method and Superpave method. The pavement performance of HDPE- rubber modified asphalt stress absorbing layer mixture with optimum asphalt content was evaluated. The results show that the optimum modifier of HDPE-rubber modified asphalt in stress absorption layer is 10% HDPE-10% HDPE5%. The optimum technological parameters are as follows: shear rate 4500r / min, shearing time 25min, temperature 175 鈩，

本文編號(hào)：1855573