新型聚脲混凝土保护材料开发及工程应用研究

Aliphatic Polyurea Coating Materials Based on Novel Polyaspartic Ester:Preparation and Application

船闸闸墙混凝土受过往船只的碰撞、摩擦,容易受破坏、形成擦痕,这不仅影响了船闸的美观,同时影响其耐久性;闸墙混凝土的有效防护是当务之急。以聚天门冬氨酸酯树脂为基体,制备了一系列脂肪族聚脲材料;并通过分析各材料的力学性能,选择其中性能最佳者作为船闸闸墙混凝土的新型抗冲撞保护材料。将该聚脲材料涂覆在混凝土表面,测试分析材料的抗冻融、抗碳化以及抗冲磨性能;在室内性能试验的基础上,将该材料用于葛洲坝和三峡大坝的船闸闸墙,进行现场生产性试验。试验结果表明,该聚脲材料具有显著的耐候性和抗冲撞性能,有望解决船闸闸墙混凝土保护这一世界性难题。

It＇ s of great importance to protect the shiplock concrete wall from damages by crash and abrasion with ships and to maintain its durability. A series of polyurea materials based on polyaspartic esters were prepared. By analyzing the mechanical properties of these materials, the optimal polyurea material was selected and was coated on concrete to test its freeze-thaw resistance, carbonation resistance, and anti-abrasion ability. Based on these in- door tests, the selected polyurea material was applied to the Gezhouba Dam and the Three Gorges Dam to perform in-situ productive test. All the test results indicated that the prepared polyurea material is a promising protective coating material of remarkable weatherability and impact resistance. This polyurea material is expected to solve the worldwide difficulty of protecting shiplock concrete wall.