温拌橡胶沥青混凝土路面关键技术研究
发布时间：2019-02-23 22:56
【摘要】：节约环保型的高性能路面是未来高速公路发展的方向,干拌工艺生产的热拌橡胶沥青路面是一种高性能的低噪声路面,可回收利用废旧橡胶轮胎,然而热拌混合料的生产能源消耗大,有害气体排量多,温拌技术可降低混合料生产温度,同时又不影响路面性能。将橡胶粉、温拌剂和SAC沥青混合料三种技术结合,可得到一种节约环保型的温拌橡胶SAC沥青路面,本文主要研究该路面的工艺参数、路面力学特性及施工温度场特点。通过分析温拌剂易铺-130对沥青性能的影响,确定了温拌剂的掺量范围为0.25%-0.35%。通过正交试验设计,确定了温拌橡胶沥青路面的工艺参数,最佳的材料配比为:油石比4.9%,橡胶粉掺量10%,温拌剂掺量0.35%,最佳的拌合及成型温度为165℃和150℃。通过对温拌橡胶沥青混合料路用性能的研究,得出其性能和热拌混合料性能基本相当,动稳定为6910次/mm,低温弯拉应变为3676με,冻融劈裂强度比为85.4%,路面性能良好。通过有限元软件分析路面力学特性,得出温拌橡胶沥青路面结构柔和、受力小;减震性能好,可降低路面噪声;路面的中面层是车辙产生的主要结构层,温拌橡胶沥青路面的上面层厚度宜选为4cm。通过对温拌橡胶沥青路面施工过程中温度场的模拟,分析了各影响因素对温度场及有效压实时间的影响。通过灰色关联分析,得出影响温拌橡胶沥青路面有效压实时间的主要因素为压实层的厚度、初始摊铺温度和气温。采用多元线性回归的方法,建立了温拌橡胶沥青路面有效压实时间与各因素间的模型。通过对路面在低温环境下施工的分析,得出温拌橡胶沥青路面的有效压实时间要大于热拌橡胶沥青路面。通过对温拌橡胶沥青路面节能减排效益分析,得出温拌技术的应用可使每吨混合料节省柴油0.87kg,有害气体排放量大幅降低,真正达到节能减排的效果。成果的应用对温拌橡胶沥青SAC路面的施工具有重要的理论指导意义,促进节约环保型路面的发展。
[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，
本文编号：2429303
[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，
本文编号：2429303
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