共查询到17条相似文献,搜索用时 515 毫秒
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机场跑道密封胶的研究 总被引:2,自引:0,他引:2
研制生产的机场跑道密封胶是一种聚硫橡胶基、自流平型双组分弹性密封胶 ,适用于机场停机坪道面、滑行跑道混凝土接缝的密封 ,具有良好的耐油、耐候和耐老化性能 ,具有良好的粘接性能。 相似文献
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制备了一种具有较优性能的橡胶改性双组分聚硫密封胶,讨论了橡胶改性剂用量、固化延迟剂用量和填料种类等因素对改性聚硫密封胶性能的影响。通过橡胶改性,提高了聚硫密封胶的抗流挂效果和储存稳定性,解决了其弹性恢复率长期不达标的难题。 相似文献
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依据"双阶交联"思路,以自主研发的聚硫氨酯液体橡胶为原胶,加入活性填料、增塑剂、缓硫化剂等助剂,再加入硫化剂、助硫化剂、增塑剂等固化剂,制备出了兼具聚氨酯、聚硫橡胶结构特征的新型绿色环保高分子材料——聚硫氨酯密封胶(PSUS).通过弹性恢复率、拉伸模量、浸水和浸油后定伸黏结性、热压冷拉后黏结性、质量损失率等试验检测了PSUS的相关性能;通过26个机场道面不同类型密封胶的使用情况比较分析了PSUS的应用效果.结果表明:PSUS的综合性能优于硅酮、聚硫和聚氨酯密封胶,应用效益显著,完全满足水泥混凝土路面对封缝材料的技术要求. 相似文献
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通过对建筑密封胶耐久性及使用寿命的分析,指出建筑物有效密封能够获得的能量远远超过生产密封胶的生产链能耗,但密封胶耐久性不佳会对建筑的长期能效产生影响;具有出色弹性回复能力和较高位移能力的中模量硅酮密封胶是建筑物保持长期耐久性的较优选择。 相似文献
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为了分析硅酮结构密封胶的相容性和粘结性对玻璃幕墙安全性和使用寿命的影响,阐述了各种老化处理对硅酮结构密封胶失效的影响。通过有机硅聚合物总量(硅胶+硅油)来初步分析了热老化-热失重的原因,并通过人工加速老化模拟实际高温对硅酮结构胶失效的影响。结果表明,热老化-热失重对硅酮结构密封胶的拉伸强度和粘结破坏面积影响显著。有机硅聚合物总量(硅胶+硅油)决定了硅酮结构密封胶的质量和使用寿命。盐雾和建筑物清洁剂对高模量胶影响很大,但基本不影响低模量胶的形变能力。通过构建硅酮结构密封胶在工程中的实际应用情况试验模型,硅酮结构密封胶的衰减率随温度升高和高温处理时间增加而增加。 相似文献
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《Building and Environment》2001,36(8):925-929
The curing characteristics of 13 high-performance sealants based on measurements of their elastic recovery is discussed. Sealants examined include one- and two-part polysulphide, one- and two-part polyurethane, and silicone commonly used on building facades. Specimens were cured under controlled conditions and tested over a period of 5 months. The implications of faster curing rate of certain sealants such as silicones and two-part sealants for joints subjected to high movement stresses are discussed. 相似文献
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介绍了光伏建筑一体化的特点及其所用硅酮密封胶的种类和性能,并对比分析了光伏建筑用硅酮密封胶与普通建筑用硅酮密封胶的差别。 相似文献
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建筑幕墙用密封材料主要有两种,一是用在石材幕墙上的石材用建筑密封胶,二是用在隐框或半隐框玻璃幕墙上的建筑用硅酮结构密封胶。石材用建筑密封胶的主要性能指标是污染性,其体现了石材用建筑密封胶与接触的石材污染的可能性。建筑用硅酮结构密封胶的主要性能指标是邵氏硬度、拉伸粘结性、结构装配系统用附件同密封胶相容性和实际工程用基材同密封胶粘结性。本文介绍了这些密封材料物理性能的检测技术和改进方式。 相似文献
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《Construction and Building Materials》2006,20(8):591-602
Concrete pavement joints are cracks intentionally formed in the pavement to accommodate expansion and contraction due to temperature changes. Today, 98% of the agencies building and maintaining concrete roadways, and 100% of the agencies building and maintaining concrete airport pavements in the United States require the sealing of these joints for new pavements. There are two major reasons for sealing rigid pavement joints. The first is to reduce the amount of water infiltrating the pavement structure, which results in slab erosion and loss of support. The second reason is to minimize the entry of incompressible materials into the joint reservoir, resulting in point loading when slabs expand under hot temperatures and subsequent joint spalling damage. Another reason for sealing rigid pavement joints is to reduce the potential for dowel bar corrosion by reducing entrance of de-icing chemicals. The proper sealing and maintenance of concrete pavement joints thus seems to be essential for the overall performance of the rigid concrete pavement. This paper seeks to find out the factors that affect sealant life and performance and how to mitigate these to improve performance and reasonably extend sealant and thereby pavement life. 相似文献