Abstract: LW/HW water soluble polyurethane grouting material is developed by scientific research institute of PowerChina Huadong Engineering Cooperation Limited at the end of the 1970s, while is the first domestic water plugging product. With the advance and application for decades, more and more products are developed and used in hydropower, mining, subway, urban construction and other projects. This paper, combined with test data and long-term engineering experience, introduces the HK-LW/HW water soluble polyurethane water plugging materials, to guide users in their choice and application of the products.

Key words: polyurethane grouting, concrete lifting, water expansion, second water plugging, crack grouting

摘要： LW/HW水溶性聚氨酯灌浆材料是华东院科研所在20世纪70年代末[1]国内率先研制成功的高效堵水产品。随着数十年的深入开发及推广应用，产品品种不断丰富，在水电、矿山、地铁、城建等领域获得应用。裂缝堵水简单易学，许多零星裂缝堵水工程被个体户承包施工，由于缺乏专业知识及应用技术，堵水效果参差不齐，已经影响到了产品声誉。笔者结合多年来的工程使用经验及大量试验数据分析，对华东院HK-LW/HW水溶性聚氨酯材料的堵水特性进行研究，以期指导广大用户能够正确选择和使用这一类型产品。

关键词: 聚氨酯灌浆, 混凝土抬动, 遇水膨胀, 二次堵水, 裂缝灌浆