【摘要】：青海地區(qū)特殊的氣候地理環(huán)境給瀝青路面施工帶來了諸多難點(diǎn),具體包括當(dāng)?shù)貎?yōu)質(zhì)集料匱乏、施工氣溫低、拌和料運(yùn)距遠(yuǎn)等。對(duì)G214瀝青路面施工考察發(fā)現(xiàn),施工單位常采用較高的拌和料出場(chǎng)溫度來保證足夠的碾壓溫度,而集料質(zhì)量控制也難以達(dá)標(biāo)。該文結(jié)合青海G214線6個(gè)標(biāo)段的瀝青路面芯樣調(diào)查,進(jìn)行關(guān)鍵篩孔通過率與瀝青路面性能指標(biāo)的相關(guān)性研究,分析了不同拌和料出場(chǎng)溫度、運(yùn)輸時(shí)間對(duì)瀝青混合料性能的影響。結(jié)果表明:0.075、4.75和9.5mm篩網(wǎng)通過率對(duì)混合料低溫性能影響較大,而混合料出場(chǎng)溫度應(yīng)保證在160℃以下,老化時(shí)間控制在3h之內(nèi)。
[Abstract]:The special climatic and geographical environment in Qinghai has brought many difficulties to asphalt pavement construction, including the shortage of high quality aggregates, low construction temperature and distance between mixing materials and so on. The investigation on the construction of G214 asphalt pavement shows that the high temperature of mixing material is often used in the construction unit to ensure the enough rolling temperature, and the quality control of aggregate is difficult to reach the standard. Based on the investigation of core samples of asphalt pavement in six sections of G214 Line in Qinghai Province, this paper studies the correlation between the pass rate of key sieve holes and the performance index of asphalt pavement, and analyzes the influence of different mixing materials' appearance temperature and transportation time on the performance of asphalt mixture. The results show that the passing rate of the 9.5mm screen and the ratio of 0. 075% to 4.75 have a great influence on the low temperature performance of the mixture, while the exit temperature of the mixture should be kept below 160 鈩，

本文編號(hào)：2127551