Spes fra Kina: Exchange knowledge and experience on development and application of innovative and robust mat on rehab of hydraulic structure

Polyurea is sticky liquid mixture consisting isocynate terminal prepolymer and keton-terminal amine hardner and other additives liquid. After being applied on the substrates, it cures to become rubber on the condition of moisture humidity in the air. It has the good adhesion on the most materials surface such as concrete, marble, ceramics, aluminium, polyurethane, PVC, etc. It can be exposed in the air without protection and with good performance of waterproof, high strength, high adhesiveness and high flexibility. It can be applied in hydraulic structures, building roofs, steel structure roofs, outside walls, water pool, bridge, underground structures, harbour engineering and other waterproofing structures for new construction, typically repairing different structural defects. It can be applied by different construction methods, such as hand brush, plate or blade brush and rolling brush. Since 2006 one component SK polyurea has been applied in repairing various defects of concrete hydraulic and hydropower structures in different projects all over China.The typical applications of using SK brush polyurea are classified the following aspects: (1)repair cracks on concrete structures (2)Repair seepage through structure joints (3)Repair the abrasion caused high discharge flow (4)Increase the strength of different structures and the characteristics of anti-seepage, anti-aging, anti-freezing, anti-abrasion etc. (5)It has been tested and proven a non-poison material that can be applied in water supply structures. This mobility project aims to exchange knowledge and experience on development and application of Polyurea on hydraulic and hydropower structures under challenging working conditions; the scientists in the two countries will further explore opportunity of research collaboration on investigation of application of SK polyurea in the cold climate in Norway.