【摘要】：近年來,由于受到“強基薄面”理論的影響,半剛性基層仍是我國高速公路路面結構類型中基層設計的首選方案。但當前交通荷載特性發(fā)展呈現(xiàn)重載化、快速化、渠道化的新趨勢,半剛性基層路面結構類型自身缺陷造成瀝青路面容易發(fā)生反射裂縫及水損害病害的問題日益突出。大粒徑透水性瀝青混合料(LSPM)作為瀝青路面柔性基層,可以有效地緩解瀝青路面反射裂縫普遍存在以及水損害過早發(fā)生的現(xiàn)狀,是瀝青路面柔性基層設計的一種新途徑、新思路。本文參考國內外有關大粒徑透水性瀝青混合料的研究成果與實踐經驗,對大粒徑透水性瀝青混合料的組成設計及適用性進行了研究。首先對MAC改性瀝青作為大粒徑透水性瀝青混合料膠結料的適用性進行了研究,測試了MAC改性瀝青的靜態(tài)流動性能、感溫性能,及其混合料的析漏性能,并經過試驗推薦了MAC改性瀝青制備試樣時的澆模溫度;介紹了大粒徑透水性瀝青混合料的強度形成機理及級配設計方法,并對大馬歇爾成型方法、體積參數(shù)測定及最佳瀝青用量確定方法針對性地開展了研究;采用馬歇爾試驗級配設計方法,確定了LSPM-30的配合比,并對其高溫穩(wěn)定性、水穩(wěn)定性、滲透性能及疲勞性能等路用性能進行對比分析;與AC-25密級配瀝青混合料的經濟性進行對比,分析評價了大粒徑透水性瀝青混合料的社會經濟效益。實驗室試驗數(shù)據分析表明,大粒徑透水性瀝青混合料具有良好的高溫穩(wěn)定性、水穩(wěn)定性、滲透性能及疲勞性能,可以有效緩解瀝青路面反射裂縫普遍存在以及水損害過早發(fā)生的現(xiàn)狀,與傳統(tǒng)的半剛性基層材料相比,具有明顯的技術優(yōu)越性。
[Abstract]:In recent years, due to the influence of the theory of "strong foundation and thin surface", semi-rigid base is still the first choice in the design of highway pavement structure in China. However, the development of traffic load characteristics shows a new trend of heavy load, rapid development and channelization. The problem that asphalt pavement is prone to reflective cracks and water damage due to the defects of semi-rigid pavement structure type is becoming more and more prominent. As a flexible base of asphalt pavement, (LSPM) with large particle size permeable asphalt mixture can effectively alleviate the widespread existence of reflective cracks and the premature occurrence of water damage on asphalt pavement. It is a new way and a new way to design flexible base course of asphalt pavement. In this paper, the composition design and applicability of the large diameter permeable asphalt mixture are studied by referring to the research results and practical experience of the large diameter permeable asphalt mixture at home and abroad. Firstly, the applicability of MAC modified asphalt as the binder of large particle permeability asphalt mixture is studied, and the static fluidity, temperature sensing performance and leakage performance of MAC modified asphalt are tested. The pouring mold temperature of MAC modified asphalt is recommended through experiments, the strength forming mechanism and gradation design method of large particle permeability asphalt mixture are introduced, and the large Marshall forming method is introduced. The determination of volume parameters and the determination of the optimum asphalt content were studied, and the proportion of LSPM-30 was determined by Marshall test gradation design method, and the high temperature stability and water stability of LSPM-30 were determined. The road performance such as permeability and fatigue performance were compared and analyzed, and compared with the economy of AC-25 dense gradation asphalt mixture, the social and economic benefits of the large diameter permeable asphalt mixture were analyzed and evaluated. The analysis of laboratory test data shows that the large particle permeability asphalt mixture has good high temperature stability, water stability, permeability and fatigue performance. It can effectively alleviate the widespread existence of reflective cracks in asphalt pavement and the premature occurrence of water damage. Compared with the traditional semi-rigid base material, it has obvious technical advantages.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U414

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本文編號：2243601