【摘要】：節(jié)約環(huán)保型的高性能路面是未來高速公路發(fā)展的方向,干拌工藝生產(chǎn)的熱拌橡膠瀝青路面是一種高性能的低噪聲路面,可回收利用廢舊橡膠輪胎,然而熱拌混合料的生產(chǎn)能源消耗大,有害氣體排量多,溫拌技術(shù)可降低混合料生產(chǎn)溫度,同時又不影響路面性能。將橡膠粉、溫拌劑和SAC瀝青混合料三種技術(shù)結(jié)合,可得到一種節(jié)約環(huán)保型的溫拌橡膠SAC瀝青路面,本文主要研究該路面的工藝參數(shù)、路面力學(xué)特性及施工溫度場特點。通過分析溫拌劑易鋪-130對瀝青性能的影響,確定了溫拌劑的摻量范圍為0.25%-0.35%。通過正交試驗設(shè)計,確定了溫拌橡膠瀝青路面的工藝參數(shù),最佳的材料配比為:油石比4.9%,橡膠粉摻量10%,溫拌劑摻量0.35%,最佳的拌合及成型溫度為165℃和150℃。通過對溫拌橡膠瀝青混合料路用性能的研究,得出其性能和熱拌混合料性能基本相當(dāng),動穩(wěn)定為6910次/mm,低溫彎拉應(yīng)變?yōu)?676με,凍融劈裂強(qiáng)度比為85.4%,路面性能良好。通過有限元軟件分析路面力學(xué)特性,得出溫拌橡膠瀝青路面結(jié)構(gòu)柔和、受力小;減震性能好,可降低路面噪聲;路面的中面層是車轍產(chǎn)生的主要結(jié)構(gòu)層,溫拌橡膠瀝青路面的上面層厚度宜選為4cm。通過對溫拌橡膠瀝青路面施工過程中溫度場的模擬,分析了各影響因素對溫度場及有效壓實時間的影響。通過灰色關(guān)聯(lián)分析,得出影響溫拌橡膠瀝青路面有效壓實時間的主要因素為壓實層的厚度、初始攤鋪溫度和氣溫。采用多元線性回歸的方法,建立了溫拌橡膠瀝青路面有效壓實時間與各因素間的模型。通過對路面在低溫環(huán)境下施工的分析,得出溫拌橡膠瀝青路面的有效壓實時間要大于熱拌橡膠瀝青路面。通過對溫拌橡膠瀝青路面節(jié)能減排效益分析,得出溫拌技術(shù)的應(yīng)用可使每噸混合料節(jié)省柴油0.87kg,有害氣體排放量大幅降低,真正達(dá)到節(jié)能減排的效果。成果的應(yīng)用對溫拌橡膠瀝青SAC路面的施工具有重要的理論指導(dǎo)意義,促進(jìn)節(jié)約環(huán)保型路面的發(fā)展。
[Abstract]:The high performance pavement of saving environmental protection is the direction of highway development in the future. The hot mix rubber asphalt pavement produced by dry mixing process is a kind of high performance low noise pavement, which can recycle waste rubber tires. However, the production energy consumption of hot mix mixture is large, the quantity of harmful gas is large, and the warm mixing technology can reduce the production temperature of mixture, and at the same time, it does not affect the pavement performance. By combining rubber powder, warm mix agent and SAC asphalt mixture, a kind of warm mix rubber SAC asphalt pavement with saving environmental protection can be obtained. This paper mainly studies the technical parameters of the pavement, the mechanical characteristics of the pavement and the characteristics of the construction temperature field. Based on the analysis of the influence of the warm mix agent-130 on the asphalt performance, the range of the temperature mix agent is determined to be 0.25-0.35. Through orthogonal test design, the technological parameters of warm mix rubber asphalt pavement are determined. The optimum material ratio is as follows: oil stone ratio 4.9, rubber powder 10, warm mix 0.35. The optimum mixing and molding temperatures are 165 鈩，

本文編號：2429303