本文關(guān)鍵詞：鋼橋面鋪裝澆注式瀝青混凝土高溫穩(wěn)定性優(yōu)化研究　出處：《西南交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鋼橋面鋪裝 GA-10混合料 高溫穩(wěn)定性 改性硬質(zhì)瀝青 配方 混料均勻設(shè)計(jì) 正交試驗(yàn)設(shè)計(jì) 配合比設(shè)計(jì) 優(yōu)化研究

【摘要】：澆注式瀝青混凝土由于具有優(yōu)良的防水性能、低溫性能、抗老化性能、抗疲勞性能及對鋼橋面板優(yōu)良的隨從性的特點(diǎn),被廣泛應(yīng)用于國內(nèi)外鋼橋面鋪裝建設(shè)中。然而,鋼橋面鋪裝早期破壞調(diào)查顯示采用澆注式瀝青混凝土的橋面鋪裝層在通車運(yùn)營期間普遍存在車轍病害。高溫穩(wěn)定性不足已成為澆注式瀝青混凝土的明顯缺陷。因此,結(jié)合實(shí)際工程,針對澆注式瀝青混凝土的高溫性能開展研究具有重要的學(xué)術(shù)意義及實(shí)用價(jià)值。本文結(jié)合成都市二環(huán)路快速公交�？空拒囖H病害修復(fù)課題,通過對�？空拒囖H病害狀況開展現(xiàn)場調(diào)研,明確了�？空拒囖H病害的類型及分布特點(diǎn),分析得出GA-10混合料高溫穩(wěn)定性不足是鋼橋面鋪裝層�？空酒毡榇嬖凇癢”形失穩(wěn)型車轍的重要原因。改性硬質(zhì)瀝青性能是決定GA-10混合料路用性能的關(guān)鍵因素。為提高改性硬質(zhì)瀝青的高溫性能,本文選取SBS改性瀝青、TLA及NES巖瀝青為摻配原材料,通過混料均勻設(shè)計(jì)方法對目標(biāo)瀝青配方進(jìn)行了優(yōu)化研究,得到了改性硬質(zhì)瀝青最佳摻配方案為SBS改性瀝青：TLA湖瀝青：NES巖瀝青=70%：25%：5%。為進(jìn)一步改善GA-10混合料的高溫抗車轍性能,本文以優(yōu)化方案改性硬質(zhì)瀝青為原材料,通過正交試驗(yàn)設(shè)計(jì)方法,以級配類型、油石比、纖維摻量為考察因素,選取流動性、動穩(wěn)定度、抗剪強(qiáng)度及低溫彎拉應(yīng)變作為GA-10混合料的性能評價(jià)指標(biāo),對GA-10混合料路用性能開展了優(yōu)化研究。在保證GA-10混合料低溫性能與施工和易性的前提下,研究確定了高溫性能較優(yōu)的配合比設(shè)計(jì)方案為《公路鋼箱梁橋面鋪裝設(shè)計(jì)與施工技術(shù)指南》級配要求表的級配中值、油石比11.0%及纖維摻量0.2%。
[Abstract]:Casting type asphalt concrete with excellent waterproof performance, low temperature performance, aging resistance, fatigue resistance and excellent characteristics of followers of the deck plates, are widely used in the steel bridge deck pavement construction. However, the bridge deck pavement survey by casting asphalt concrete in operation during the period of widespread the early damage of pavement rutting. Poor high-temperature stability has become the obvious defects of cast asphalt concrete. Therefore, combined with the actual engineering, research on high temperature performance of Gussasphalt Concrete has important academic significance and practical value. In this paper, with the two Chengdu city loop BRT stop rut repair project, through to the dock station of rutting situation to carry out field research, clear call types and distribution characteristics of rutting station, analysis of GA-10 mixture High temperature stability of the steel deck stop common "W" shaped failure reasons. Stable rutting performance of modified asphalt is hard GA-10 mixture. The key factors affecting the performance in order to improve the high temperature performance of the modified hard asphalt, this paper selects SBS modified asphalt, TLA and NES rock asphalt blending of raw materials, through uniform mixing design method of asphalt target formula has been optimized, the modified hard asphalt mixture optimum scheme for SBS modified asphalt, TLA asphalt Lake: NES rock asphalt =70%:25%:5%. for high temperature GA-10 to further improve the rutting resistance performance, the optimization scheme of modified hard asphalt as the raw material, through orthogonal design method, the gradation, asphalt aggregate ratio, fiber content as factors, selection of mobility, dynamic stability, tensile strain as GA-10 mixture strength and low temperature bending shear The performance evaluation index of GA-10 mixture to carry out optimization of performance studies. In the premise of ensuring the GA-10 mixture low temperature performance and construction workability, studied with high temperature performance better than the design scheme for highway pavement "median gradation design and Construction Guide > gradation requirements table, Whetstone than 11% dosage and fiber 0.2%.

【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U444

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本文編號：1381845