共查询到18条相似文献,搜索用时 78 毫秒
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胶粉改性沥青的生产及其在公路建设中的应用 总被引:2,自引:0,他引:2
叙述了国内外用废轮胎胶粉改性沥青修筑公路的概况,我国用胶粉改性沥青的制法及其性能和国内外的标准,以及我国用胶粉改性沥青铺筑公路的设备和工艺方法及其使用情况和经济效益等的概况。 相似文献
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利用双螺杆反应挤出工艺,制备一种以活化的轮胎胶粉(GTR)为基材的沥青改性材料,从而实现以成本有效的方式对沥青改性,并满足高温储存稳定性以及延性要求.首先研究了不同SBS和GTR复合材料对沥青延度的影响,结果表明,当选用S/B比例为30/70的SBS与GTR共混挤出的材料表现出更好的延度.然后进一步对比研究了三种不同的... 相似文献
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TB胶粉改性沥青是在传统湿法橡胶沥青的基础上,发展起来的一种新型改性沥青,具有黏度低、储存稳定性好等优点。从制备过程、改性机理、组分分析、性能评价、影响因素、应用及优缺点等方面,归纳总结了近年来TB胶粉改性沥青的相关研究成果,对TB胶粉改性沥青进行了全面的综述。重点介绍了TB胶粉沥青的改性机理,即胶粉在高温高速剪切条件下,发生脱硫降解反应,显著降低了结合料的黏度,改善了施工和易性、储存稳定性及低温性能,同时降低了高温性能。最新研究表明,采用TB+SBS、TB+纳米材料、TB+岩沥青或TB+反应型改性剂复合改性,能够制得综合性能较好的改性沥青,是TB橡胶沥青未来主要的发展方向。 相似文献
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研究脱硫胶粉改性沥青的性能。对不同掺量脱硫胶粉改性沥青进行针入度、软化点、延度、180 ℃粘度测试,确定脱硫胶粉的最佳掺量,然后对最佳掺量的脱硫胶粉改性沥青进行热稳定性和性能衰变测试、高温动态剪切流变测试和低温弯曲蠕变测试,研究其热稳定性、高温性能和低温性能。结果表明:脱硫胶粉的最佳掺量为基质沥青质量的24%;脱硫胶粉改性沥青的储存温度宜为165~175 ℃,储存时间不应超过48 h;与普通胶粉改性沥青和基质沥青相比,在相同温度条件下,脱硫胶粉改性沥青的复数剪切模量、抗车辙因子和蠕变速率增大,相位角和劲度模量减小,即脱硫胶粉能够有效改善改性沥青的高温性能和低温性能。 相似文献
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脱硫胶粉改性沥青工艺及储存稳定性研究 总被引:2,自引:0,他引:2
在较高温度下高速剪切混合脱硫胶粉和沥青制备脱硫胶粉改性沥青,考察了温度、时间、脱硫胶粉粒径、脱硫胶粉加量及稳定剂加量对沥青性能、改性沥青粘度和储存稳定性的影响,以探究脱硫胶粉改性沥青的工艺条件及其对改性沥青性能、粘度和储存稳定性的影响.结果表明:改性温度的升高和时间的延长可以改善改性沥青性能,60目脱硫胶粉且加量为20%质量百分数时,改性沥青的性能最优,储存稳定性最高,稳定剂的加入显著地改善了脱硫胶粉-沥青体系的交联度,进一步改进了改性沥青的性能,增加了体系的稳定性;在脱硫胶粉/总量=0.2(质量比,60目)、温度200 ℃、时间60 min及稳定剂加量为0.4%(质量百分数)时,脱硫胶粉改性沥青的性能最佳、稳定性最高. 相似文献
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M. Anwar Parvez Mohammed Al‐Mehthel Hamad I. Al‐Abdul Wahhab Ibnelwaleed A. Hussein 《应用聚合物科学杂志》2014,131(7)
In this study, waste crumb rubber and sulfur were utilized to enhance the performance of asphalt binder for pavement applications. About 20–50% of sulfur and 1–6% crumb rubber were used. Melt properties were investigated using thermal analysis, dynamic and steady shear rheology, and artificial aging. Rheological tests were carried out in ARES rheometer. Both steady and dynamic shear rheology showed that crumb rubber improved the viscoelastic properties of the sulfur‐extended asphalt binder. Crumb rubber modification reduced temperature susceptibility of sulfur/asphalt, and increased the upper grading (performance) temperature of sulfur asphalt. The combined effect of sulfur and crumb rubber reduced the activation energy compared with that of pure asphalt. Zero‐shear viscosity and strategic highway research program rutting parameter (G*/sinδ) improved by crumb rubber incorporation into the sulfur asphalt binder. Short‐term aging improved G*/sinδ with slight increase in activation energy. The addition of sulfur to asphalt matrix increased the viscoelastic properties (G′ and G″) of sulfur asphalt. The addition of crumb rubber to sulfur asphalt enhanced the temperature resistance of the binder. Utilization of waste crumb rubber and sulfur in asphalt modification proved to enhance asphalt pavement life. In addition, utilization of such wastes can help in meeting the extra demand for asphalt, reduce the pavement cost, and help in solving a waste disposal problem. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40046. 相似文献
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研究了废旧橡胶粉改性沥青和AH-70道路沥青氧化过程中正戊烷沥青质含量的变化,并以此为根据,研究了两种沥青的老化动力学,计算了有关的动力学参数,得到了老化动力学模型。结果表明,两种沥青的老化过程均属于一级动力学反应,废旧橡胶粉改性沥青比基质沥青具有更好的耐老化性能。 相似文献
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Influence of modification process parameters on the properties of crumb rubber/EVA modified asphalt 下载免费PDF全文
Changqing Fang Xiaoting Qiao Ruien Yu Xin Yu Jianjun Liu Jiang Yu Ronghou Xia 《应用聚合物科学杂志》2016,133(27)
Crumb rubber (CR) and ethylene vinyl acetate copolymer (EVA) were adopted as asphalt modifiers. Routine tests, softening point, penetration, and ductility were used to evaluate the basic properties of crumb rubber and ethylene vinyl acetate copolymers (CR/EVA) modified asphalt. The segregation experiment measured the storage stability. Modern test methods such as fluorescence microscopic photography technology was used to study stability of polymer modified asphalt. Infrared spectrum experiment was used to analyze the composition differences of the upper part and lower part of CR/EVA modified asphalt. Matlab software was employed to fit out the formulae of ductility, penetration, and softening point difference of modified asphalt and shearing temperature, shearing time and shearing rate separately. Compared with base asphalt, the properties of CR/EVA modified asphalt have been greatly improved. The formulae which were fitted out by Matlab software showed that the shearing time was the foremost factor affecting the properties of CR/EVA modified asphalt, followed by shearing temperature, and the last was shearing rate. The conclusions which were fitted by orthogonal experiment were basically consistent with the results of formulae which were fitted out by Matlab software. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43598. 相似文献
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