Abstract: The slab joint waterstop is one of the key issues during the development of CFRDs, which is very important to the safety of CFRDs. In this paper, technical development of slab joint waterstop of CFRDs in the world has been reviewed and analysed, especially the integrated mechanical construction tech-nology and the brush-coated flexible waterstop technology that have been developed in recent years. These two new technologies can effectively overcome the defects of the conventional waterstop and improve the safety and reliability of the whole waterstop system. It is pointed out that, the compressive spalling of con-crete face is the new problem associated with slab joint waterstop of high CFRDs. In addition to the mea-sures of soft vertical joint to reduce the compressive strain in the face, the protection coating over the po-tential compressive spalling area is also an effective method, but the essential measures still lies in the two aspects of controlling deformation compatibility of rockfill itself and also together with concrete face as well as improving concrete face resistance to the compressive spalling.

Keywords: CFRDs; slab joint waterstop; GB plastic filler; brush-coated flexible waterstop

(Journal of China Institute of Water Resources and Hydropower Research, Vol. 16, No. 5, 2018)