共查询到20条相似文献,搜索用时 343 毫秒
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弹性体改性沥青防水卷材按照《GB 18242-2008弹性体改性沥青防水卷材》中5.3材料性能一章的规定要进行可溶物含量的检测,并根据卷材的型号及厚度给出了相应的可溶物含量最低要求,可溶物含量检测按照《GBT 328.26-2007建筑防水卷材试验方法 第26部分沥青防水卷材可溶物含量(浸涂材料含量)》中规定的方法进行检测,本次评定按照相应标准对某企业生产的型号为SBS I PY PE PE 3 10的产品进行可溶物含量测定并根据试验过程及结果对本次试验进行测量不确定的评定,结果通过计算,该弹性体改性沥青防水卷材可溶物含量相对标准不确定度μ=34.42g/m2,扩展不确定度U=(2 482±69)g/m2,根据标准规定数据取整数,故其拓展部确定度为69g/m2,从此次评定测量不确定度的过程中可以看出其主要来源为试件个体差异前后称量质量引入的。 相似文献
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介绍了JC/T690-2008《沥青复合胎柔性防水卷材》、JC/T1076-2008《胶粉改性沥青玻纤毡与玻纤网格布增强防水卷材》、JC/T1077-2008《胶粉改性沥青玻纤毡与聚乙烯膜增强防水卷材》、JC/T1078-2008《胶粉改性沥青聚酯毡与玻纤网格布增强防水卷材》等4项行业标准制修订的目的和标准主要内容,提出了贯彻执行新标准的措施。 相似文献
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介绍了JC/T 690-2008<沥青复合胎柔性防水卷材>、JC/T 1076-2008<胶粉改性沥青玻纤毡与玻纤网格布增强防水卷材>、JC/T 1077-2008<胶粉改性沥青玻纤毡与聚乙烯膜增强防水卷材>、JC/T 1078-2008<胶粉改性沥青聚酯毡与玻纤网格布增强防水卷材>等4项行业标准制修订的目的和标准主要内容,提出了贯彻执行新标准的措施. 相似文献
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以SK90号基质沥青及不同掺量胶粉和SBS改性剂制备复合改性沥青,对其软化点等常规指标及流变力学指标进行检测。研究表明,随胶粉和SBS改性剂掺量提高,复合改性沥青的软化点、旋转粘度及弹性恢复等指标呈显著增大趋势,而针入度则不断减小,延度则先增大后减小;胶粉和SBS改性剂均可改善复合改性沥青的高温性能,且当胶粉掺量相同时,其高温性能随SBS改性剂掺量的增大而增大;随胶粉和SBS改性剂掺量的增大,复合改性沥青的m值不断减小,s值呈不断增大趋势;在胶粉掺量相对较低时,SBS改性剂对复合改性沥青的改性效果更加显著,而当胶粉掺量过大时,SBS改性剂对复合改性沥青的改性效果则显著减小。 相似文献
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Shutang Liu Weidong Cao Jianguo Fang Shujie Shang 《Construction and Building Materials》2009,23(7):2701-2708
In order to sort some important factors affecting the performances of CRM asphalt and evaluate the performances of different CRM asphalt, this study encompassed one kind of base asphalt binder, four kinds of crumb rubber, tread rubber (TR), heavy truck (HT), small truck (ST) and agriculture tire (AT) crumb rubber, two kinds of particle size, 60 mesh and 80 mesh, and three contents. Softening point, low temperature ductility, and penetration index are selected as basic evaluation indicators in analysis. Variance analysis shows that the crumb rubber content is the primary affecting factor in general, followed by the crumb rubber type, and particle size comes last. The greater the crumb rubber content is, the higher the softening point and the penetration index are, and the smaller the low temperature ductility is. Modified effects between 60 mesh and 80 mesh don’t manifest significant difference. The modified effects of TR-crumb rubber and HT-crumb rubber are better while the low temperature ductility of AT-CRM asphalt is the worst. Also according to the results of DSR and BBR test, TR-CRM asphalt has a better and comprehensive performance at the crumb rubber content of 20% by weight of base asphalt binder, and, if the price is also considered, selecting HT-CRM asphalt with the crumb rubber content of 15% is ideal. The study also finds an interesting phenomenon that the rutting factors of CRM asphalt may be remarkably different, although the softening points of them are the same. 相似文献
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分析了制备橡胶粉改性沥青的湿法工艺,对多种掺量橡胶粉的橡胶粉改性沥青的各项性能进行了分析与对比,研究了橡胶粉掺量对改性沥青的影响,发现橡胶粉对沥青的改性效果非常明显,橡胶粉改性沥青的多项性能有大幅提高,满足公路建设需要。 相似文献