堆石坝混凝土面板裂缝防护技术研究
发布时间：2019-02-21 08:45
【摘要】：利用喷涂聚脲材料作为混凝土面板坝的裂缝防护材料,并创新采用高柔性聚氨酯材料作为塑性过渡层,提出高渗透加固型基层处理剂/聚氨酯塑性过渡层/聚脲层的复合防护体系,有效抑制由于基层沉降或伸缩变形引起的裂缝变形对表层防护材料的影响,避免由于零断裂延伸原理引起有机防护层的开裂,为混凝土面板坝表面裂缝处理提供了新的材料和技术方案。对复合防护体系力学性能、抗冲击能力、抗冻融性、粘结强度、裂缝适应性等综合性能进行评价,结果显示,以聚脲为主材构筑的复合防护层具有优异的综合防护效果,该复合防护体系在四川省甘孜州某水电站成功进行试用。
[Abstract]:The sprayed polyurea material is used as the crack protection material of concrete face slab dam, and the high flexible polyurethane material is used as the plastic transition layer. The composite protective system of high permeable base course treatment agent / polyurethane plastic transition layer / polyurea layer is put forward, which can effectively restrain the effect of crack deformation caused by base course settlement or stretching deformation on surface protective material. Avoiding the cracking of organic protective layer due to the principle of zero fracture extension provides a new material and technical scheme for surface crack treatment of concrete face slab dam. The mechanical properties, impact resistance, freeze-thaw resistance, bond strength and crack adaptability of the composite protective system are evaluated. The results show that the composite protective layer constructed with polyurea as the main material has excellent comprehensive protective effect. The composite protection system was successfully tested in a hydropower station in Ganzi Prefecture, Sichuan Province.
【作者单位】： 江苏苏博特新材料股份有限公司;高性能土木工程材料国家重点实验室;
【基金】：江苏省科技支撑计划项目基金资助(BE2014019)
【分类号】：TV544
本文编号：2427398
[Abstract]:The sprayed polyurea material is used as the crack protection material of concrete face slab dam, and the high flexible polyurethane material is used as the plastic transition layer. The composite protective system of high permeable base course treatment agent / polyurethane plastic transition layer / polyurea layer is put forward, which can effectively restrain the effect of crack deformation caused by base course settlement or stretching deformation on surface protective material. Avoiding the cracking of organic protective layer due to the principle of zero fracture extension provides a new material and technical scheme for surface crack treatment of concrete face slab dam. The mechanical properties, impact resistance, freeze-thaw resistance, bond strength and crack adaptability of the composite protective system are evaluated. The results show that the composite protective layer constructed with polyurea as the main material has excellent comprehensive protective effect. The composite protection system was successfully tested in a hydropower station in Ganzi Prefecture, Sichuan Province.
【作者单位】： 江苏苏博特新材料股份有限公司;高性能土木工程材料国家重点实验室;
【基金】：江苏省科技支撑计划项目基金资助(BE2014019)
【分类号】：TV544
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