湖瀝青改性瀝青在高速公路的應用技術研究
發(fā)布時間：2018-08-24 16:16
【摘要】：在現(xiàn)有的高速公路建設中,SBS改性瀝青得到了很廣泛的應用,然而隨著SBS價格的不斷提高,與道路出現(xiàn)的各種損壞的加劇,人們開始尋找一種價格合理而路用性能又十分優(yōu)越的瀝青材料來替代SBS改性瀝青。經(jīng)過一些實際工程的使用效果與工程實踐,人們開始發(fā)現(xiàn)特立尼達湖瀝青在路用性能方面具有一定的優(yōu)越性。本文主要研究了湖瀝青改性瀝青在高速公路的應用技術研究,主要從湖瀝青的改性機理、影響湖瀝青混合料性能的因素、湖瀝青在高溫多與地區(qū)的評價指標研究、湖瀝青的配伍性與室內(nèi)加工工藝研究這四個方面來開展研究,得出的主要結(jié)論如下:①通過瀝青組分的四組分試驗可以看出,瀝青軟化點受瀝青中瀝青質(zhì)的含量的變化而影響較大,瀝青質(zhì)的含量在很大程度上也影響了瀝青的高溫性能。②巖瀝青與湖瀝青與基質(zhì)瀝青相比較而言,芳香芬與飽和芬明顯比較低,膠質(zhì)的含量相差不大,有顯著區(qū)別的是瀝青質(zhì)的含量明顯比基質(zhì)瀝青要高。③不用種類的瀝青在同一種液體中的接觸角變化并不顯著。④通過同樣一種的瀝青與不一樣的液體之間的試驗可以看出,它們接觸角的大小與液體所具有的表面張力具有比較好的關聯(lián)性,并且如果液體的表面張力逐漸變大,則兩種液體之間的接觸角也變得越大。這一規(guī)律與粉體是同樣的。⑤結(jié)合干、濕法試驗結(jié)果綜合分析可知,造成濕法工藝條件下高溫性能改善不顯著的原因是:湖瀝青改性瀝青在放置在拌鍋之前,由于灰分發(fā)生了一定的沉淀,直接導致了湖瀝青改性瀝青中瀝青量與灰分含量的不穩(wěn)定,在傳統(tǒng)的濕法加工工藝中,這種灰分的不均勻的現(xiàn)象無可避免,所以在加工工藝上,采用干法加工工藝能達到更好的性能效果。⑥干濕法的加工工藝對湖瀝青的馬歇爾穩(wěn)定度的影響不大,并且其穩(wěn)定度的值遠遠大于規(guī)范的技術要求。這也就說明,馬歇爾指標對于湖瀝青改性瀝青而言,不是控制性的技術指標。⑦SHRP研究成果的PG分級方法,可有效的對TLA改性瀝青進行評價。⑧TLA改性瀝青與基質(zhì)瀝青在兩者的相容性方面,基本上沒有配伍性的問題,也就是TLA與任何一種基質(zhì)瀝青制備TLA改性瀝青時,只需要用物理加熱并采用機械攪拌來制備TLA改性瀝青就可以了。
[Abstract]:SBS modified asphalt has been widely used in the existing highway construction. However, with the increasing of SBS price, the damage of various kinds of roads has been aggravated. People began to look for a reasonable price and excellent performance of asphalt to replace SBS modified asphalt. Through the application effect and engineering practice of some practical projects, people began to find that Trinidad Lake asphalt has certain superiority in road performance. This paper mainly studies the application technology of lake asphalt modified asphalt in expressway, mainly from the view of the modification mechanism of lake asphalt, the factors affecting the performance of lake asphalt mixture, the evaluation index of lake asphalt in high temperature and area. The compatibility of lake asphalt and the study of indoor processing technology are studied in four aspects. The main conclusions are as follows: 1. Through the four-component test of the asphalt component, we can see, The softening point of asphalt is greatly affected by the change of asphaltene content in asphalt, and the content of asphaltene also affects the high temperature performance of asphalt to a great extent. Aromatic and saturated fen were significantly lower than those of saturated fen, and the content of colloid was not different. The significant difference is that the asphaltene content is significantly higher than that of the base asphalt. 3. 3 the contact angle of the asphalt in the same liquid does not change significantly. 4 as can be seen from the tests between the same asphalt and the different liquid, Their contact angle is closely related to the surface tension of the liquid, and if the surface tension of the liquid increases gradually, the contact angle between the two liquids becomes larger. This rule is the same as that of powder. The comprehensive analysis of wet test results shows that the reason for the improvement of high temperature performance under wet process condition is that the asphalt modified by lake asphalt is placed before mixing pot. Due to the precipitation of ash, it leads directly to the instability of asphalt content and ash content in the modified asphalt of lake asphalt. In the traditional wet processing technology, the uneven ash content phenomenon is inevitable, so in the processing technology, 6. Dry and wet processing technology has little effect on Marshall stability of lake asphalt, and its stability value is far greater than the technical requirements of specifications. This means that Marshall index is not a controlling technical index. 7SHRP PG classification method for lake asphalt modified asphalt. It is effective to evaluate the compatibility between the modified asphalt and the bitumen of TLA, that is, when TLA and any kind of asphalt are used to prepare the modified asphalt of TLA, there is no compatibility between the asphalt and the asphalt. TLA modified asphalt can be prepared by physical heating and mechanical stirring.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U414
本文編號：2201349
[Abstract]:SBS modified asphalt has been widely used in the existing highway construction. However, with the increasing of SBS price, the damage of various kinds of roads has been aggravated. People began to look for a reasonable price and excellent performance of asphalt to replace SBS modified asphalt. Through the application effect and engineering practice of some practical projects, people began to find that Trinidad Lake asphalt has certain superiority in road performance. This paper mainly studies the application technology of lake asphalt modified asphalt in expressway, mainly from the view of the modification mechanism of lake asphalt, the factors affecting the performance of lake asphalt mixture, the evaluation index of lake asphalt in high temperature and area. The compatibility of lake asphalt and the study of indoor processing technology are studied in four aspects. The main conclusions are as follows: 1. Through the four-component test of the asphalt component, we can see, The softening point of asphalt is greatly affected by the change of asphaltene content in asphalt, and the content of asphaltene also affects the high temperature performance of asphalt to a great extent. Aromatic and saturated fen were significantly lower than those of saturated fen, and the content of colloid was not different. The significant difference is that the asphaltene content is significantly higher than that of the base asphalt. 3. 3 the contact angle of the asphalt in the same liquid does not change significantly. 4 as can be seen from the tests between the same asphalt and the different liquid, Their contact angle is closely related to the surface tension of the liquid, and if the surface tension of the liquid increases gradually, the contact angle between the two liquids becomes larger. This rule is the same as that of powder. The comprehensive analysis of wet test results shows that the reason for the improvement of high temperature performance under wet process condition is that the asphalt modified by lake asphalt is placed before mixing pot. Due to the precipitation of ash, it leads directly to the instability of asphalt content and ash content in the modified asphalt of lake asphalt. In the traditional wet processing technology, the uneven ash content phenomenon is inevitable, so in the processing technology, 6. Dry and wet processing technology has little effect on Marshall stability of lake asphalt, and its stability value is far greater than the technical requirements of specifications. This means that Marshall index is not a controlling technical index. 7SHRP PG classification method for lake asphalt modified asphalt. It is effective to evaluate the compatibility between the modified asphalt and the bitumen of TLA, that is, when TLA and any kind of asphalt are used to prepare the modified asphalt of TLA, there is no compatibility between the asphalt and the asphalt. TLA modified asphalt can be prepared by physical heating and mechanical stirring.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U414
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