Underwater non-dispersible concrete flocculant is a concrete mixture composed of water-soluble polymer and surfactant. It has strong dispersion resistance and good fluidity, reaches the self-leveling and self-compaction of underwater concrete, inhibits the dispersion of cement for underwater jobs and environment-friendly. The comprehensive strength of underwater concrete added with flocculant can reach more than 70% of that of onshore concrete with the same ratio when water drop is 0.3 ~ 0.5m.

It is applicable to all kinds of underwater concrete works like construction of large-diameter underwater cofferdam, caisson, filling of caisson, underwater retaining wall, filling of large-diameter cofferdam, underwater slope without concrete, and filling of foundation slab etc. Pile sealing and plugging and underwater works that are difficult to construct with ordinary concrete; Underwater concrete is not limited by water depth, construction surface and concrete volume (various underwater works with a maximum depth of 37.8m and a concrete volume of several to several thousand cubic meters have been constructed). The concrete construction in tidal section is also not affected by the tide.

The dosage is 2% - 3% only, the comprehensive cost is relatively low and widely used in coastal areas.