路面裂缝常温施工修补材料的制备与性能研究

发布时间：2018-03-21 16:39

本文选题：道路工程　切入点：路面裂缝修补　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：裂缝是沥青路面主要早期病害之一，不仅破坏道路结构完整性，还会降低行车的舒适性和安全性。由于环境温度、交通荷载等因素的影响，裂缝将逐渐扩展，在雨水的作用下，对路面结构造成进一步危害，使道路结构逐渐失去承载能力，因此裂缝及时修补对道路正常使用意义重大。目前主要采用裂缝修补材料进行路面裂缝处理，但普通热补材料适用于地段集中、工程量较大的路面维修，对于地段分散、工程量小的裂缝使用受限；而普通常温施工修补材料低温柔韧性差，与裂缝壁的粘结强度低，极易出现修补材料外溢、裂缝渗水等情况，加速裂缝扩展。因此，研发一种新型裂缝修补材料非常重要。本文采用先改性后乳化的方式制备了一种性能优良的SBS改性乳化沥青路面裂缝修补材料，对其高低温性能及抗老化性能进行了评价，并与市售的三种裂缝修补材料进行对比；考虑到路面修补材料所处的界面环境不同，本文评价了不同界面条件下裂缝修补材料与裂缝壁的粘附性能。主要研究内容如下：依据改性乳化工艺难易程度、改性乳化沥青性能基本性能优劣初步优选了制备裂缝修补材料的原材料；系统研究不同材料组成及制备条件对改性乳化沥青裂缝修补材料性能的影响规律，确定最优制备方案。利用软化点、流动度、动态剪切流变（DSR）等试验评价了乳化沥青路面裂缝修补材料的高温性能；通过延度、低温弯曲流变（BBR）等试验表征了乳化沥青路面裂缝修补材料的低温性能；使用压力老化（PAV）试验对材料老化前后的软化点、延度及弹性恢复进行对比，研究其抗老化性能。结果表明，与市售的三种常用常温施工裂缝修补材料相比，本文研制的裂缝修补材料具有优良的高低温性能及抗老化性能。通过研究不同湿度、腐蚀、油污及不作处理四种界面情况时修补材料与裂缝壁的粘附性，探究影响路面修补材料粘附性能的主要因素。结果表明，，本文研制的裂缝修补材料在水、酸性、油污环境中粘结强度较其他三种材料好，灌缝后耐久性也最佳。
[Abstract]:Crack is one of the major early diseases of asphalt pavement, not only destroy the structural integrity of the road, but also reduce the driving comfort and safety. Due to the environmental temperature, the influence factors of traffic load, the crack expands gradually, under the effect of rain, causing further damage to the pavement structure, road structure gradually lose the bearing capacity therefore, timely repair cracks on the road of normal use of great significance. At present the main crack repair material for pavement cracks, but ordinary repair materials suitable for lots of concentrated, large amount of pavement maintenance engineering, for lots of cracks scattered, small engineering quantity restricted use; and ordinary construction repair materials at room temperature and low temperature flexibility, bond strength and the low wall cracks, prone to repair material overflow, crack seepage conditions, accelerated crack propagation. Therefore, the development of a new crack repair material is very heavy To.
The first modified emulsion was prepared by way of a kind of excellent performance of SBS modified emulsified asphalt pavement crack repair material, the high temperature performance and anti aging properties were evaluated and compared three kinds of crack repair material with commercially available; considering the Pavement interface environment at different repair materials in this paper, the evaluation of adhesion performance of different interface conditions of crack repair material and cracks. The main research contents are as follows:
Based on the modified emulsification degree of difficulty, change the basic performance of emulsified asphalt quality preliminary optimization raw materials preparation of crack repair material; system of different material composition and preparation effect of modified emulsified asphalt crack repairing materials of conditions, to determine the optimal preparation scheme.
The softening point, fluidity, dynamic shear rheometer (DSR) test evaluation of high-temperature performance of asphalt crack filling material by emulsion; ductility, low temperature rheological bending (BBR) test to characterize the performance of low temperature crack repair material emulsified asphalt pavement; use pressure aging (PAV) test on the material before and after aging softening the extension of point, contrast and elastic recovery, study its anti aging properties. The results show that, compared with the commercially available three kinds of normal construction materials for mending cracks, crack repair material developed in this paper has excellent high temperature performance and anti-aging properties.
The effects of different humidity, corrosion, oil and do not deal with four kinds of interface adhesion of repair materials and cracks, explore the main factors affecting the adhesion performance of pavement repair material. The results show that the crack repair material developed in water, acid, oil pollution in bond strength than the other three kinds of materials, irrigation after the joint durability is also the best.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

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