常温拌和沥青混合料性能评价与改善研究
发布时间：2018-10-30 17:05
【摘要】：常温拌和沥青混合料作为一种“绿色”材料,是一种新型的沥青路面材料。由于热拌、温拌技术耗能高、污染重,以及现有冷拌料价格高、性能指标差等问题的存在,造成冷拌料不能作为结构层用于面层。因此,本文针对这些问题,对常温拌和沥青混合料进行研究,主要从混合料的结合料的开发及评价、混合料配比设计、性能改善、养生方式的选择分析、不同养生方式下路用性能的对比分析、以及动、静态模量以及疲劳性能等方面展开研究。本文以沥青与矿料的拌和、裹附状态和混合料的性能验证为开发判据,研究开发能够作为结构层使用的冷拌沥青,并提出冷拌沥青及其混合料的技术要求。基于开发的SBS改性乳化沥青、溶剂型沥青,本文选择AC-13和OGFC-13两种混合料级配类型,依据冷拌料成型的方法,参照热拌改性沥青混合料的技术指标,分别对乳化沥青(AC-13、OGFC-13)混合料和溶剂沥青(AC-13、OGFC-13)混合料的各项性能进行研究,并对不能满足要求的混合料的提出相应的改善方法。在养生方面,本文以养生后混合料的性能与室外养生的性能接近值为选择判据,来确定模拟室外养生的最佳方式。通过对室内养生、室外养生以及烘箱养生的研究,确立以混合料的质量变化、失水率、溶剂挥发率、以及马歇尔稳定度为指标来评价常温拌和沥青混合料室内、外养生和烘箱养生的效果。通过对混合料室内养生7天、室外养生7天以及烘箱养生(60℃48h、90℃24h、110℃24h)混合料质量变化、失水率、溶剂挥发率、以及马歇尔强度对比分析,确定出能够模拟室外养生的最佳的快速养生方式。本文采用烘箱快速养生的方法来最大限度地模拟混合料室外养生7d的效果。以热拌改性混合料的性能指标为评判依据,通过对室外养生7d、60℃养生48h、90℃养生24h、110℃养生24h等不同养生条件下的路用性能来验证养生的效果,对比分析AC-13、OGFC-13的路用性能是否满足热拌改性混合料的要求。本文在参考热拌沥青混合料动、静态模量以及疲劳性能的试验方法的基础上,对在90℃养生24h条件下的常温拌和沥青混合料的静态、动态模量以及疲劳性能进行研究。通过对混合料的静态、动态模量以及疲劳性能的研究,能够全面准确的评价混合料的力学性能,同时也为常温拌和沥青混合料作为路面结构层的设计提供参考。
[Abstract]:As a green material, mixing asphalt mixture at room temperature is a new kind of asphalt pavement material. Due to the problems of high energy consumption, heavy pollution, high price and poor performance of existing cold mix materials, cold mix materials can not be used as structural layer for surface layer because of the high energy consumption and heavy pollution of hot mixing and warm mixing technology. Therefore, aiming at these problems, this paper studies asphalt mixture at room temperature, mainly from the development and evaluation of mixture binder, mixture mix design, performance improvement, selection and analysis of health maintenance mode. The contrastive analysis of road performance, dynamic, static modulus and fatigue performance were carried out in different ways. In this paper, the mixing of asphalt and mineral aggregate, the binding state and the performance verification of the mixture are taken as the development criteria, the cold mix asphalt which can be used as the structure layer is researched and developed, and the technical requirements of the cold mix asphalt and its mixture are put forward. Based on the developed SBS modified emulsified asphalt and solvent asphalt, this paper selects two gradation types of AC-13 and OGFC-13 mixture, according to the method of cold mix forming, referring to the technical index of hot mixed modified asphalt mixture. The performances of emulsified asphalt (AC-13,OGFC-13) mixture and solvent asphalt (AC-13,OGFC-13) mixture were studied, and the corresponding improvement methods were put forward for the mixture which could not meet the requirements. In the aspect of health preservation, the best way to simulate outdoor health is determined by the selection criterion of the performance of mixture after curing and the performance of outdoor health. Through the study of indoor, outdoor and oven health preservation, it is established that the mixture quality change, water loss rate, solvent volatilization rate and Marshall stability are used as indicators to evaluate the indoor mixing of asphalt mixture at room temperature. The effect of external health preservation and oven health preservation. The mixture quality changes, water loss rate, solvent volatilization rate and Marshall strength were compared with each other for 7 days, 7 days for indoor, 7 days for outdoor health, and 60 鈩，
本文编号：2300624
[Abstract]:As a green material, mixing asphalt mixture at room temperature is a new kind of asphalt pavement material. Due to the problems of high energy consumption, heavy pollution, high price and poor performance of existing cold mix materials, cold mix materials can not be used as structural layer for surface layer because of the high energy consumption and heavy pollution of hot mixing and warm mixing technology. Therefore, aiming at these problems, this paper studies asphalt mixture at room temperature, mainly from the development and evaluation of mixture binder, mixture mix design, performance improvement, selection and analysis of health maintenance mode. The contrastive analysis of road performance, dynamic, static modulus and fatigue performance were carried out in different ways. In this paper, the mixing of asphalt and mineral aggregate, the binding state and the performance verification of the mixture are taken as the development criteria, the cold mix asphalt which can be used as the structure layer is researched and developed, and the technical requirements of the cold mix asphalt and its mixture are put forward. Based on the developed SBS modified emulsified asphalt and solvent asphalt, this paper selects two gradation types of AC-13 and OGFC-13 mixture, according to the method of cold mix forming, referring to the technical index of hot mixed modified asphalt mixture. The performances of emulsified asphalt (AC-13,OGFC-13) mixture and solvent asphalt (AC-13,OGFC-13) mixture were studied, and the corresponding improvement methods were put forward for the mixture which could not meet the requirements. In the aspect of health preservation, the best way to simulate outdoor health is determined by the selection criterion of the performance of mixture after curing and the performance of outdoor health. Through the study of indoor, outdoor and oven health preservation, it is established that the mixture quality change, water loss rate, solvent volatilization rate and Marshall stability are used as indicators to evaluate the indoor mixing of asphalt mixture at room temperature. The effect of external health preservation and oven health preservation. The mixture quality changes, water loss rate, solvent volatilization rate and Marshall strength were compared with each other for 7 days, 7 days for indoor, 7 days for outdoor health, and 60 鈩，
本文编号：2300624
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