本文關鍵詞： 濕熱地區(qū) 多孔排水瀝青混合料 高粘瀝青 瀝青膠漿 路用性能　出處：《福州大學》2014年碩士論文　論文類型：學位論文

【摘要】：濕熱地區(qū)氣候高溫多雨,多孔排水改性瀝青技術的應用具有廣泛的應用前景。本文重點針對多孔透水瀝青路面的改性瀝青混合料的路用性能與材料設計開展了研究。具體包括多孔排水瀝青混合料配合比設計,多孔排水瀝青混合料路用性能,高粘改性瀝青膠漿特性,高粘改性瀝青性能特性,多孔排水瀝青混合料施工與技術指標研究等,研究結論如下：空隙率與2.36mm篩孔通過率呈現良好的正相關,隨著2.36mm篩孔通過率增加,空隙率逐漸減小。在孔隙率確定的情況下,影響多孔排水瀝青混合料配合比設計最敏感的兩個因素是瀝青類型(瀝青技術指標)和油石比。連續(xù)空隙率隨混合料的總空隙率增大而增大,兩者基本呈線性關系。瀝青的品種和含量對混合料的空隙率影響不大�？障堵试酱�,石石結構特征越顯著,混合料結構強度下降,剛性增強。不同空隙率多孔瀝青混合料的滲水系數均超過900ml/15s要求,滲水系數與空隙率有明顯的相關性,空隙率(%)與滲水系數(ml/15s)近似呈線性關系�？障堵试龃�,多孔排水瀝青混合料構造深度越大,高粘瀝青的使用一定程度降低構造深度。多孔狀態(tài)下,構造深度可達130～240(0.01mm),2%的混合料孔隙率改變將導致40(0.01mm)個構造深度的改變。排水瀝青混合料功能的實現主要取決于級配的設計,但空隙率越大混合料骨架的力學性能越差,排水多孔混合料性能的實現、耐久性保障和進一步提升主要取決于瀝青。瀝青的高粘度是保證骨架結構、防飛散、高溫穩(wěn)定性、水穩(wěn)定性的關鍵指標。高粘改性瀝青的制備,往往導致低溫指標、韌度和柔度指標的下降,以及135℃施工粘度過粘,如何確保高粘改性瀝青具有較好的低溫指標、韌度和135℃施工和易性,以及較好的抗老化性能,是研發(fā)和挑選高性能高粘改性瀝青的關鍵。瀝青膠漿的性質主要有瀝青性質決定,礦粉一方面使瀝青變稠,但膠漿相比瀝青的高溫性能變化不大,但低溫性能下降顯著,這對于瀝青的研發(fā)和選擇來看,重視瀝青的低溫指標控制十分重要。綜合以上,以及參照國內外的相關規(guī)范要求,本文給出了濕熱地區(qū)多孔排水瀝青及瀝青混合料的技術指標。建議進一步加強高性能改性瀝青的研究,高粘瀝青性能的發(fā)展是未來多孔排水瀝青混合料性能提升的重要動力。
[Abstract]:In humid and hot areas, the climate is hot and rainy. The application of porous drainage modified asphalt technology has a wide application prospect. This paper focuses on the road performance and material design of the modified asphalt mixture of porous permeable asphalt pavement, including porous drainage leachate. Mix ratio design of green mixture. The road performance of porous drainage asphalt mixture, high viscosity modified asphalt slurry, high viscosity modified asphalt performance, porous drainage asphalt mixture construction and technical index research. The results are as follows: there is a good positive correlation between the porosity and the pass rate of 2.36mm sieve hole. With the increase of the pass rate of 2.36mm sieve hole, the porosity decreases gradually. The two most sensitive factors affecting the mix design of porous and drained asphalt mixture are asphalt type (asphalt technical index) and asphalt stone ratio. The continuous void ratio increases with the increase of the total porosity of the mixture. The variety and content of asphalt have little effect on the porosity of mixture. The larger the void ratio, the more obvious the structural characteristics of stone and the decrease of structural strength of mixture. The permeability coefficient of porous asphalt mixture with different porosity is more than 900ml / 15s, and there is obvious correlation between permeability coefficient and porosity. The porosity is approximately linearly related to the permeability coefficient (ml / 15s). The greater the porosity, the greater the structural depth of porous drainage asphalt mixture. The use of high viscosity asphalt reduces the depth of structure to a certain extent. In porous state, the depth of structure can reach 130 ~ 240 ~ 0.01mm). The change of porosity of 2% mixture will lead to the change of 40 ~ 0. 01 mm) structural depth. The realization of function of drainage asphalt mixture mainly depends on the design of gradation. However, the greater the void ratio, the worse the mechanical properties of the mixture, the performance of the porous mixture, durability protection and further improvement mainly depend on the asphalt. The high viscosity of asphalt is to ensure the skeleton structure, anti-flying. The key indexes of high temperature stability and water stability. The preparation of high viscosity modified asphalt often leads to the decrease of low temperature index, toughness and flexibility index, as well as the viscosity overviscosity at 135 鈩，

本文編號：1475063