The development of rubber & plastics seals in material modified and modern version composition elastomer and progress in research and application of low fraction material, polyurethane material, thermoplastic elastomer and nanocomposites were summarized.

High performance polyurethane pouring sealant was prepared with polytetramethylene glycol(PTMG),totylene diisocyanate(TDI) and methylene bis ortho chloroaniline(MOCA) solution,and the effects of the equivalent ratio n (—NH 2)/ n (—NCO), w (—NCO),finished cure time and relative humidity on the mechanical and electric properties were investigated.

Development of water-soluble one component polyurethane grout;

Properties of ground limestone-water glass grout material and their affecting factors;

Research progress on accelerated corrosion test method which can evaluate the corrosion protecveness of the post tensioning grouts is reviewed.

Preparation of high strength and water-soluble epoxy ester resin grouting material;

Preparation of environmental protection and high strength itaconic epoxy ester resin grouting material;

Study on preparing grouting material by water glass-activated fine slag powder;