It can be treated with hardener, such as z2 concrete hardener, which is specially developed to solve the problems of concrete floor, wall dusting, sanding, insufficient hardness, etc. It is a new type of water-based organic composite material with unique characteristics, which can effectively penetrate the concrete surface -10mm, a series of complex chemical reactions occur with the free substances in the concrete to form a three-dimensional network dense whole, thereby greatly improving the surface strength of the concrete, achieving the effect of hardening the ground, sanding and ash, and it is durable Effective, the service life is the same as that of concrete, and the construction is simple, only need to brush on the concrete surface. Thoroughly clean up the dust on the ground first, and try not to leave any ash. If you want to wash with water, you must build it every other day, and make sure that the ground is free of clear water or too wet. Use the method of pouring while rushing. The material is evenly driven away, so that the material can fully penetrate into the ground within 30 minutes, and the material should be brushed at any time where there is a phenomenon of seepage and dryness, and the accumulated material should be swept evenly.