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

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