本文關(guān)鍵詞： 廠(chǎng)拌熱再生 高RAP摻量 變異性 配合比設(shè)計(jì) 路面壓實(shí)　出處：《東南大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：瀝青混凝土廠(chǎng)拌熱再生技術(shù)是道路工程中應(yīng)用最廣泛的再生技術(shù)之一,但舊料摻量通常較低,影響了廠(chǎng)拌熱再生技術(shù)的經(jīng)濟(jì)效益和再生效率。本文著重研究了再生混合料的高溫穩(wěn)定性能、低溫抗裂性能和水穩(wěn)定性能隨舊料摻量增加體現(xiàn)的變化規(guī)律,在配合比設(shè)計(jì)過(guò)程中,給出了更適合級(jí)配設(shè)計(jì)的舊料摻量定義,以體積指標(biāo)為控制條件的新添加的油石比預(yù)測(cè)方法。證實(shí)了高舊料摻量再生瀝青混合料的技術(shù)可行性,并將舊料摻加比例提高至50%。道路地質(zhì)條件、使用時(shí)長(zhǎng)、交通量和舊料所處層位等因素的差異會(huì)導(dǎo)致舊料級(jí)配、含水率和油石比產(chǎn)生變異。本文研究了舊料含水率和舊料所處層位的關(guān)系,油石比的變異和舊料比表面積的關(guān)系。重點(diǎn)研究了回收瀝青混合料的級(jí)配變異規(guī)律,根據(jù)舊料級(jí)配分布,將舊料按照篩孔大小分為95mm-19mm、2.36mm-4.75mm、≤2.36mm三檔,通過(guò)具體實(shí)驗(yàn)數(shù)據(jù)得出三檔舊料的級(jí)配大致變異范圍,并且以40%的舊料摻量為例計(jì)算出這三檔舊料引起再生瀝青混合料整體的級(jí)配變異比例范圍分別是：5%,6%和3%,證實(shí)變異后的再生瀝青混合料的級(jí)配范圍已不滿(mǎn)足規(guī)范的規(guī)定要求。針對(duì)RAP級(jí)配變異引發(fā)的性能的變異問(wèn)題,由再生瀝青混合料的強(qiáng)度構(gòu)成原理入手,采取控制4.75mm篩孔通過(guò)率趨于上限的方法保證再生瀝青混合料高溫性能的穩(wěn)定性,并且從低溫和水穩(wěn)性能等方面驗(yàn)證了配合比設(shè)計(jì)方法的優(yōu)越性。同時(shí)模擬實(shí)驗(yàn)研究RAP摻量對(duì)再生瀝青混合料壓實(shí)效果的影響規(guī)律；并針對(duì)再生瀝青混合料拌和過(guò)程中的瀝青膜分布特點(diǎn),優(yōu)化了高舊料摻量再生瀝青混合料的拌和工藝。本文的研究較為全面的揭示了廠(chǎng)辦熱再生瀝青混合料的性能變化以及回收舊料的變異性規(guī)律,提供了適合高舊料摻量的再生瀝青混合料的配合比設(shè)計(jì)方法,探究了新舊料混合時(shí)瀝青的轉(zhuǎn)移規(guī)律,為廠(chǎng)辦熱再生進(jìn)一步的研究提供了一定的理論基礎(chǔ)。
[Abstract]:Asphalt concrete hot recycling technology is one of the most widely used recycling technologies in road engineering, but the amount of used materials is usually low. This paper mainly studies the high temperature stability, low temperature crack resistance and water stability of recycled mixture with the increase of the amount of used materials. In the process of proportioning design, the definition of the amount of used material which is more suitable for gradation design is given. The new prediction method of asphalt ratio with volume index as control condition proves the technical feasibility of recycled asphalt mixture with high volume of used materials, and increases the proportion of used materials to 50. Geological conditions of roads. The difference of using time, traffic volume and the layer of used material will lead to the variation of gradation, water content and oil stone ratio. This paper studies the relationship between the water cut of used material and the layer where used material is located. The relationship between the variation of oil stone ratio and the specific surface area of used materials. The rule of gradation variation of recycled asphalt mixture was studied emphatically. According to the gradation distribution of used materials, the used materials were divided into 95mm-19mm according to the size of sieve hole. 2.36mm-4.75mm, 鈮，

本文編號(hào)：1458470