【摘要】：纖維瀝青混合料因其優(yōu)良的高溫穩(wěn)定性、低溫抗裂性及抗水損害性能被廣泛應(yīng)用于瀝青路面工程。目前,可用于瀝青混合料的纖維類(lèi)型眾多,路用效果參差不齊,工程造價(jià)相差較大,探索新型路用纖維具有重要的現(xiàn)實(shí)意義。本文以環(huán)保、資源化利用棉秸稈,制備棉秸稈纖維,輔以木質(zhì)素纖維,進(jìn)行瀝青混合料配合比設(shè)計(jì),檢驗(yàn)其路用性能。首先,選用AC-13和SMA-13礦料級(jí)配,采用馬歇爾試驗(yàn)方法,依次確定設(shè)計(jì)級(jí)配、棉秸稈纖維合理?yè)搅考白罴延褪?隨后,依次采用車(chē)轍試驗(yàn)、低溫彎曲破壞試驗(yàn)、浸水馬歇爾試驗(yàn)、凍融劈裂試驗(yàn)評(píng)價(jià)棉秸稈纖維瀝青混合料的高溫穩(wěn)定性、低溫抗裂性及水敏感性,結(jié)果表明:對(duì)于A(yíng)C-13型瀝青混合料,棉秸稈纖維最佳摻量約為0.2%,對(duì)于SMA-13型瀝青混合料,棉秸稈纖維最佳摻量約為0.3%;AC-13和SMA-13棉秸稈纖維瀝青混合料最佳油石比分別為5.0%、5.9%;與未摻棉秸稈纖維瀝青混合料相比,最佳油石比約增加0.2%,動(dòng)穩(wěn)定度約提高30%,低溫抗彎破壞應(yīng)變約提高15.0%,棉秸稈纖維瀝青混合料殘留穩(wěn)定度和凍融劈裂強(qiáng)度比均能滿(mǎn)足規(guī)范要求。棉秸稈纖維瀝青混合料與木質(zhì)素纖維瀝青混合料各項(xiàng)路用性能基本接近,為推廣棉秸稈纖維在瀝青混合料中的應(yīng)用提供參考。
[Abstract]:Fiber asphalt mixture is widely used in asphalt pavement engineering because of its excellent high temperature stability, low temperature crack resistance and water damage resistance. At present, there are many fiber types that can be used in asphalt mixture, the road effect is uneven, and the engineering cost is quite different. It is of great practical significance to explore the new type of road fiber. In this paper, cotton straw fiber was prepared by environmental protection and resource utilization of cotton straw, supplemented by lignin fiber, and the mixture proportion design of asphalt mixture was carried out to test its road performance. Firstly, AC-13 and SMA-13 mineral gradation were selected and Marshall test method was used to determine the design gradation, the reasonable amount of cotton straw fiber and the optimum oil / stone ratio. Then, the rut test and low temperature bending failure test were used in turn. Water immersion Marshall test and freeze thaw splitting test were used to evaluate the high temperature stability, low temperature cracking resistance and water sensitivity of cotton straw fiber asphalt mixture. The results showed that for AC- 13 asphalt mixture, the optimum content of cotton straw fiber was about 0.2%. For SMA- 13 asphalt mixture, the optimum content of cotton straw fiber is about 0.3%. The optimum oil-stone ratio of AC-13 and SMA-13 cotton straw fiber asphalt mixture was 5.0% and 5.9%, respectively. Compared with the unmixed cotton straw fiber asphalt mixture, the optimum oil-stone ratio is increased by 0.2%, the dynamic stability is increased by 30%, and the bending failure strain at low temperature is increased by 15.0%. The residual stability and freeze-thaw split strength ratio of cotton straw fiber asphalt mixture can meet the requirements of the code. The road performance of cotton straw fiber asphalt mixture is close to that of lignin fiber asphalt mixture, which provides a reference for popularizing the application of cotton straw fiber in asphalt mixture.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U414

【引證文獻(xiàn)】

相關(guān)會(huì)議論文 前1條

1 毛煒嶧;南慶紅;史紅政;;新疆氣候變化特征及氣候分區(qū)研究[A];中國(guó)氣象學(xué)會(huì)2008年年會(huì)氣候變化分會(huì)場(chǎng)論文集[C];2008年

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本文編號(hào)：2475427