Application of anionic polyacrylamide in cement

The effect of polyacrylamide in concrete, PAM flocculant on cement concrete bridge deck pavement layer, can improve the flexural strength, bonding strength, bending toughness and wear resistance has a significant effect, and can reduce the compression and folding ratio, permeability and shrinkage. Anionic flocculants are generally recommended because of their high viscosity, low price and good water retention effect. We also can use in putty powder above do thickener, mortar king above, concrete, basically is to improve the viscosity of the product, the scope of application is a little more extensive. Both anionic and non-ionic products make use of its viscosity, water retention, flocculant, lubricity and other characteristics, giving play to its unique application advantages.

The research shows that adding a small amount of organic polymer in cement concrete, such as polyacrylamide, becomes a new trend to improve the performance of cement concrete. Because of the long molecular chain structure of organic polymer and large molecules in the bond or chain segment of the self-rotation, it has different properties with inorganic non-metallic materials - elastic and plastic, so adding polyacrylamide in concrete can improve the density of concrete. Polyacrylamide is a water-soluble polymer, with good flocculation, can reduce the friction resistance between the liquid, according to the ionic characteristics can be divided into non-ionic, anionic, cationic and amphoteric type of four types.

In use, some people will use anions as glue to use, usually do glue using 16-18 million molecular weight anionic polyacrylamide can, if the molecular weight is too low, the proportion of production is significantly reduced, the quality can not be guaranteed. Studies have proved that polyacrylamide can improve the flexural strength, bond strength, bending toughness and wear resistance of cement concrete bridge deck pavement, and can reduce the compression and folding ratio, permeability and shrinkage. Based on the customer reaction used generally using anionic polyacrylamide almost all can be applied.