渠道保温材料保温性能演化规律的试验研究

发布时间：2018-03-05 14:49

本文选题：渠道　切入点：保温材料　出处：《中国水利水电科学研究院学报》2017年05期 　论文类型：期刊论文

【摘要】：渠道冻害是寒区水利建设中的常见问题,采用衬砌保温措施是目前常见的防治方法,本文选择了6种常见的发泡保温材料,其中包括4种硬质发泡材料(不可卷曲)和2种软质发泡材料(可卷曲),研究了它们在应力、浸水及冻融情况下保温效果的变化规律。试验发现,软质材料在保温稳定性方面有一定优势,但力学性能无法满足工程需要。硬质材料中EVA保温板、XPS保温板和EPS保温板具有非常接近的长期保温效果,而在力学性能方面XPS和EPS更有优势。影响EPS和XPS保温板长期保温性能的首要因素是冻融问题,所以改善聚苯乙烯保温板抗冻融性能具有重要的现实意义。
[Abstract]:Freezing injury of canal is a common problem in water conservancy construction in cold region. Adopting lining insulation measure is a common prevention method at present. In this paper, six kinds of common foaming insulation materials are selected. It includes four kinds of rigid foaming materials (non-crimping) and two kinds of soft foaming materials (curling). The variation of heat preservation effect under stress, water immersion and freeze-thaw conditions is studied. Soft materials have some advantages in insulation stability, but mechanical properties can not meet the requirements of engineering. In hard materials, EVA thermal insulation board and EPS insulation board have very close long-term insulation effect. In the aspect of mechanical properties, XPS and EPS have more advantages. The main factor that affects the long-term thermal insulation performance of EPS and XPS insulation board is freeze-thaw problem, so it is of great practical significance to improve the freeze-thaw resistance of polystyrene insulation board.
【作者单位】：中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【基金】：流域水循环模拟与调控国家重点实验室自主研究课题(2014QN05)
【分类号】：TV41

【相似文献】