本文選題：隧道瀝青路面 + 阻燃降粘技術(shù)��； 參考：《長安大學(xué)》2015年碩士論文

【摘要】：從隧道安全運營角度出發(fā),我國中長以上隧道路面鋪裝結(jié)構(gòu)以水泥混凝土為主,但水泥混凝土路面有平整度差、抗滑性差、灰塵大、噪聲大、高反光等缺陷。相對而言瀝青混合料路面具有較好的表面構(gòu)造保持能力、行車舒適性以及較好的抗滑性能,采用瀝青混凝土作為隧道路面的鋪裝結(jié)構(gòu)層已逐漸成為趨勢。但在隧道中采用瀝青混合料進行路面鋪筑,由于隧道處于一種具有封閉性的空間結(jié)構(gòu)狀態(tài),而且瀝青屬于可燃材料,隧道內(nèi)部通風(fēng)條件差,一旦發(fā)生交通事故火災(zāi),瀝青混合料中的瀝青有可能在高溫條件下燃燒并釋放有毒、有害氣體及煙塵,給救援帶來極大困難。隧道瀝青路面混合料阻燃降粘技術(shù)的研究目的就是通過一定的技術(shù)手段制備得到阻燃瀝青混合料,以降低火災(zāi)事故的危害;同時考慮到隧道路面施工的特殊性,為降低普通熱拌瀝青混合料施工所產(chǎn)生大量的煙霧,減小對施工技術(shù)人員健康的影響并提高工作效率,采用降粘技術(shù)以降低混合料的施工溫度并減少煙霧釋放量。本文通過大量的試驗,研究了在瀝青中添加不同摻量的阻燃劑,測定其三大指標(biāo)、LOI值以及瀝青的存儲穩(wěn)定性,確定出阻燃劑的摻量范圍,在基質(zhì)瀝青中摻加阻燃劑最大摻量為6%,在SBS改性瀝青中阻燃劑最大摻量為10%;測定了在瀝青中添加降粘劑后瀝青的基本指標(biāo)以及表觀粘度,繪制粘—溫曲線進而確定出降粘劑的摻量,在SBS改性瀝青中SA降粘劑最大摻量為4%、TPSA摻量為3%;在基質(zhì)瀝青中SA降粘劑摻量為3%、TPSA摻量為3%。采用正交試驗設(shè)計對摻加阻燃劑、降粘劑的瀝青膠結(jié)料進行試驗分析,得出配比摻量的最優(yōu)組合,基質(zhì)瀝青添加降粘劑及阻燃劑的最優(yōu)配比為:3%SA降粘劑+6%阻燃劑、3%TPSA+5%阻燃劑;SBS改性瀝青中添加降粘劑與阻燃劑的最優(yōu)配比為:3%SA降粘劑+7%阻燃劑、3%TPSA+7%阻燃劑。在瀝青混合料性能研究中得出,最優(yōu)組合條件下瀝青混合料的路用性能滿足現(xiàn)行規(guī)范的要求,通過直觀燃燒試驗表明瀝青混合料阻燃效果明顯,而且相比普通熱拌瀝青混合料的施工溫度均得以降低。
[Abstract]:From the point of view of tunnel safety operation, cement concrete is the main pavement structure of medium length tunnel pavement in our country. However, cement concrete pavement has some defects such as poor smoothness, poor skid resistance, large dust, high noise, high reflection and so on. Relatively speaking, asphalt mixture pavement has better surface structure retention ability, driving comfort and better skid resistance. It has gradually become a trend to use asphalt concrete as the pavement pavement pavement structure layer. However, the asphalt mixture is used for pavement construction in the tunnel. Because the tunnel is in a closed space structure state, and the asphalt belongs to combustible material, the ventilation condition inside the tunnel is poor, once the traffic accident fire occurs, Bitumen in asphalt mixture may burn and release toxic, harmful gas and smoke under high temperature, which brings great difficulties to rescue. The purpose of the research on the flame retardant and viscosity reduction technology of the asphalt pavement mixture of tunnel is to prepare the flame retardant asphalt mixture through certain technical means to reduce the harm of fire accident and to consider the particularity of the tunnel pavement construction at the same time. In order to reduce the large amount of smoke produced by the construction of common hot mix asphalt mixture, reduce the influence on the health of the construction technicians and improve the working efficiency, the viscosity reduction technique is adopted to reduce the construction temperature of the mixture and to reduce the smoke emission. In this paper, through a lot of experiments, the addition of different amount of flame retardant to asphalt is studied, the three indexes of flame retardant are measured, and the storage stability of asphalt is determined, and the range of the amount of flame retardant is determined. The maximum amount of flame retardant is 6 in matrix asphalt and 10 in SBS modified asphalt. The basic index and apparent viscosity of asphalt after adding viscosity reducer to asphalt are measured. The viscosity reducer content was determined by drawing the visco-temperature curve. The maximum content of SA viscosity reducer was 3 in SBS modified asphalt and 3 in matrix asphalt. The asphalt binder with flame retardant and viscosity reducer was tested and analyzed by orthogonal experimental design, and the optimal combination of the proportion of the binder was obtained. The optimum ratio of viscosity reducer and flame retardant to base asphalt is: 1: 3SA viscosity reducer 6% flame retardant and 3TPSA 5% flame retardant. The optimum ratio of viscosity reducer and flame retardant to SBS modified asphalt is 7% viscosity reducer 7% flame retardant and 7% TPSA 7% flame retardant. In the study of asphalt mixture performance, it is concluded that the pavement performance of asphalt mixture meets the requirements of current code under the optimal combination condition, and the visual combustion test shows that the flame retardant effect of asphalt mixture is obvious. And compared with the ordinary hot mix asphalt mixture construction temperature can be reduced.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414

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本文編號：1828017