濕熱重載條件下混凝土橋梁瀝青鋪裝防水粘結(jié)層的性能研究
發(fā)布時間：2018-08-04 09:22
【摘要】：近年來我國公路事業(yè)發(fā)展迅速,而橋梁作為公路網(wǎng)中的重要組成部分,在公路建設(shè)及運營中所起的作用十分明顯。橋面鋪裝屬于橋梁的重要組成部分,其質(zhì)量的好壞影響著行車質(zhì)量、橋梁的安全耐久性與經(jīng)濟(jì)效益。而防水粘結(jié)層作為橋面鋪裝的一部分有著非常重要的作用——既通過自身粘結(jié)力將水泥橋面板與瀝青混凝土面層粘結(jié)為完整的一體,起到承上啟下的作用,也通過自身良好的不透水性來抵御外來水分侵蝕橋梁內(nèi)部,起到保護(hù)橋面板的作用。為了保證橋面鋪裝良好的路用性能,有必要對防水粘結(jié)層的性能與選擇進(jìn)行研究。本文基于廣東省的濕熱多雨的氣候特點,結(jié)合室內(nèi)實驗及理論分析,對防水層粘結(jié)層材料的基本性能與路用性能進(jìn)行系統(tǒng)的深入研究,將結(jié)果進(jìn)行對比分析后優(yōu)選出適合廣東省水泥混凝土橋面使用的防水粘結(jié)層材料。本研究通過對廣東地區(qū)公路橋梁的橋面病害進(jìn)行調(diào)研,對防水粘結(jié)層原材料基本性能進(jìn)行檢測,并成型復(fù)合試件,通過一系列室內(nèi)試驗研究,得到以下研究成果:1、對AMP-100二階反應(yīng)型防水材料、FYT-1橋面防水材料、SBS改性瀝青以及改性乳化瀝青幾種防水原材料的固含量、耐熱度、粘結(jié)強(qiáng)度、拉伸強(qiáng)度等基本性能進(jìn)行了試驗檢測。試驗結(jié)果表明,四種材料的基本性能指標(biāo)均符合《道橋用防水涂料》(JC/T975-2005)中的標(biāo)準(zhǔn)要求。2、在不同溫度、剪切速率、界面處理方式條件下通過室內(nèi)剪切試驗評價各防水材料的抗剪切能力。試驗結(jié)果表明,在相同溫度條件下各材料抗剪強(qiáng)度大小順序為SBS+瓜米石AMP-100FYT-1改性乳化瀝青,且FYT-1在低溫時抗剪性能較好,而AMP-100的高溫抗剪性能較好;在剪切速率較低即重載條件下,SBS+瓜米石的抗剪性能為最佳,FYT-1與AMP-100次之,改性乳化瀝青則較差;經(jīng)鑿毛處理的試件的抗剪強(qiáng)度明顯比未鑿毛的試件要高,最大增加了34.0%。3、在不同溫度、是否浸水的條件下通過室內(nèi)拉拔試驗評價防水材料抗拉拔能力。試驗結(jié)果表明,各防水材料的拉拔強(qiáng)度隨著溫度的增大而逐漸減小,且在相同溫度條件下,拉拔性能優(yōu)劣依次為:SBS+瓜米石AMP-100FYT-1改性乳化瀝青;浸水后各材料的拉拔強(qiáng)度明顯低于未浸水的試件。4、利用ABAQUS有限元軟件對橋面鋪裝結(jié)構(gòu)模型的層間剪應(yīng)力與法向拉應(yīng)力進(jìn)行分析。結(jié)果表明,當(dāng)車輛軸載增大一倍時,層間橫向最大剪應(yīng)力最大增長為原來的1.72倍,層間縱向最大剪應(yīng)力最大增長為原來的3.04倍,層間法向拉應(yīng)力最大增大為原來的2.52倍。對不同工況下分析后可得到層間最大剪應(yīng)力為0.39MPa.,最大法向拉應(yīng)力為0.21MPa,建議廣東地區(qū)在25℃條件下防水材料的抗剪強(qiáng)度應(yīng)不小于0.45MPa,抗拉拔強(qiáng)度不小于0.3MPa。防水層厚度的變化對層間應(yīng)力沒有明顯影響,建議廣東省地區(qū)橋面鋪裝防水層的施工厚度以3mm為最佳;防水層模量以100~300MPa為最佳。5、對水性涂料防水粘結(jié)層的施工關(guān)鍵技術(shù)進(jìn)行了研究,最后綜合對幾種材料的抗剪性能、拉拔性能以及經(jīng)濟(jì)效益進(jìn)行對比分析,優(yōu)選出適合廣東地區(qū)使用的最佳防水材料為SBS改性瀝青+瓜米石。
[Abstract]:In recent years, the road cause has developed rapidly in our country. As an important part of the highway network, bridge plays an obvious role in highway construction and operation. The bridge deck pavement belongs to the important part of the bridge. The quality of the bridge affects the traffic quality, the safety and durability of the bridge, and the economic benefit. The waterproof bond layer is used as the bridge. Part of the surface pavement has a very important role - both cement bridge deck and asphalt concrete face are bonded to a complete integration through their own cohesive force. It plays an important role, and it also protects the bridge deck by protecting the bridge deck through its good impermeability to protect the bridge deck. It is necessary to study the performance and selection of the waterproof adhesive layer. Based on the climate characteristics of wet and hot and rainy weather in Guangdong Province, this paper systematically studies the basic and road properties of the waterproof layer bonded layer material combined with the indoor experiment and theoretical analysis. The results are compared and analyzed. The waterproof adhesive layer material used in the cement concrete bridge of Guangdong province. Through the investigation of the bridge surface disease of the highway bridges in Guangdong, the basic properties of the waterproof adhesive layer were tested and the composite specimens were formed. Through a series of laboratory tests, the following research results were obtained: 1, the two order reaction prevention of AMP-100 Water material, FYT-1 bridge surface waterproof material, SBS modified asphalt and modified emulsified bitumen are tested for the solid content, heat resistance, bond strength, tensile strength and other basic properties. The test results show that the basic performance indexes of the four materials are all in accordance with the standard requirement.2 in the waterproofing coating > (JC/T975-2005) for the road and bridge. Under the conditions of different temperature, shear rate and interface treatment, the shear resistance of each waterproof material is evaluated by indoor shear test. The experimental results show that the order of shear strength of each material under the same temperature is SBS+ AMP-100FYT-1 modified emulsified asphalt, and the shear resistance of FYT-1 at low temperature is better, while AMP-100 is higher. Under the condition of low shear rate, the shear property of SBS+ is the best, FYT-1 and AMP-100 are the best, the modified emulsified asphalt is poor; the shear strength of the specimen treated by the chisel is obviously higher than that of the unchiseled specimen, and the maximum increase is 34%.3 at different temperatures and under the condition of water immersion. The tensile strength of the waterproof material is evaluated by the drawing test. The test results show that the drawing strength of each waterproof material decreases gradually with the increase of temperature. And under the same temperature conditions, the drawing properties of the materials are in turn SBS+ AMP-100FYT-1 modified emulsified asphalt, and the drawing strength of each material after immersion is obviously lower than that of the unsoaked specimen.4, The ABAQUS finite element software is used to analyze the interlayer shear stress and normal tensile stress of the bridge deck pavement structure model. The results show that when the vehicle axle load is doubled, the maximum shear stress of the interlayer transverse maximum shear stress is 1.72 times as large as the original, and the maximum shear stress of the interlayer longitudinal maximum shear stress is 3.04 times as much as the original, and the maximum tensile stress between the layers increases greatly. For the original 2.52 times, the maximum shear stress of the interlayer can be 0.39MPa. and the maximum normal tensile stress is 0.21MPa. It is suggested that the shear strength of the waterproof material should not be less than 0.45MPa under the condition of 25 C, and the change of the tensile strength not less than the thickness of the 0.3MPa. waterproof layer has no obvious influence on the interlayer stress in Guangdong. The construction thickness of the bridge deck pavement waterproof layer in Guangdong province is 3mm, and the waterproof layer modulus takes 100~300MPa as the best.5. The key technology of waterproofing coating is studied. Finally, the shear performance, drawing performance and economic benefit of several materials are compared and analyzed, and it is suitable for the use of Guangdong area. The best waterproof material is SBS modified asphalt + Cucumber stone.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U443.33
本文編號：2163382
[Abstract]:In recent years, the road cause has developed rapidly in our country. As an important part of the highway network, bridge plays an obvious role in highway construction and operation. The bridge deck pavement belongs to the important part of the bridge. The quality of the bridge affects the traffic quality, the safety and durability of the bridge, and the economic benefit. The waterproof bond layer is used as the bridge. Part of the surface pavement has a very important role - both cement bridge deck and asphalt concrete face are bonded to a complete integration through their own cohesive force. It plays an important role, and it also protects the bridge deck by protecting the bridge deck through its good impermeability to protect the bridge deck. It is necessary to study the performance and selection of the waterproof adhesive layer. Based on the climate characteristics of wet and hot and rainy weather in Guangdong Province, this paper systematically studies the basic and road properties of the waterproof layer bonded layer material combined with the indoor experiment and theoretical analysis. The results are compared and analyzed. The waterproof adhesive layer material used in the cement concrete bridge of Guangdong province. Through the investigation of the bridge surface disease of the highway bridges in Guangdong, the basic properties of the waterproof adhesive layer were tested and the composite specimens were formed. Through a series of laboratory tests, the following research results were obtained: 1, the two order reaction prevention of AMP-100 Water material, FYT-1 bridge surface waterproof material, SBS modified asphalt and modified emulsified bitumen are tested for the solid content, heat resistance, bond strength, tensile strength and other basic properties. The test results show that the basic performance indexes of the four materials are all in accordance with the standard requirement.2 in the waterproofing coating > (JC/T975-2005) for the road and bridge. Under the conditions of different temperature, shear rate and interface treatment, the shear resistance of each waterproof material is evaluated by indoor shear test. The experimental results show that the order of shear strength of each material under the same temperature is SBS+ AMP-100FYT-1 modified emulsified asphalt, and the shear resistance of FYT-1 at low temperature is better, while AMP-100 is higher. Under the condition of low shear rate, the shear property of SBS+ is the best, FYT-1 and AMP-100 are the best, the modified emulsified asphalt is poor; the shear strength of the specimen treated by the chisel is obviously higher than that of the unchiseled specimen, and the maximum increase is 34%.3 at different temperatures and under the condition of water immersion. The tensile strength of the waterproof material is evaluated by the drawing test. The test results show that the drawing strength of each waterproof material decreases gradually with the increase of temperature. And under the same temperature conditions, the drawing properties of the materials are in turn SBS+ AMP-100FYT-1 modified emulsified asphalt, and the drawing strength of each material after immersion is obviously lower than that of the unsoaked specimen.4, The ABAQUS finite element software is used to analyze the interlayer shear stress and normal tensile stress of the bridge deck pavement structure model. The results show that when the vehicle axle load is doubled, the maximum shear stress of the interlayer transverse maximum shear stress is 1.72 times as large as the original, and the maximum shear stress of the interlayer longitudinal maximum shear stress is 3.04 times as much as the original, and the maximum tensile stress between the layers increases greatly. For the original 2.52 times, the maximum shear stress of the interlayer can be 0.39MPa. and the maximum normal tensile stress is 0.21MPa. It is suggested that the shear strength of the waterproof material should not be less than 0.45MPa under the condition of 25 C, and the change of the tensile strength not less than the thickness of the 0.3MPa. waterproof layer has no obvious influence on the interlayer stress in Guangdong. The construction thickness of the bridge deck pavement waterproof layer in Guangdong province is 3mm, and the waterproof layer modulus takes 100~300MPa as the best.5. The key technology of waterproofing coating is studied. Finally, the shear performance, drawing performance and economic benefit of several materials are compared and analyzed, and it is suitable for the use of Guangdong area. The best waterproof material is SBS modified asphalt + Cucumber stone.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U443.33
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