Source of Viscosity in Concrete: Polyacrylamide
The effect of Polyacrylamide in concrete, polyacrylamide flocculant on the cement concrete bridge deck pavement, can improve the flexural strength, bond strength, flexural toughness and abrasion resistance, and can reduce the ratio of compressive strength, permeability and shrinkage. Because of its high viscosity, low price and good water retention effect, anionic polyacrylamide is generally recommended to use anionic polyacrylamide. It can also be used in the putty powder as thickener, mortar and concrete above, basically is to improve the viscosity of the products, the more extensive application of a point. Both anionic and non ionic products use their viscosity, water retention, flocculation, lubricity and other characteristics, to play its unique application advantages.
The results show that adding a small amount of organic polymer, such as polyacrylamide, to cement concrete is a new trend to improve the performance of cement concrete. Because the spin long molecular chain structure of organic polymer and molecular keys in a section or segment to determine its, with the elastic and plastic properties with different inorganic non-metallic materials, so adding polyacrylamide in concrete can improve the density of concrete. Polyacrylamide is water soluble polymers, has good flocculation, can reduce the friction resistance between liquid, by ion characteristic can be divided into nonionic, anionic, cationic and amphoteric four types.
Some people will use to anion used as glue, usually do glue with anionic polyacrylamide 1600-1800 million molecular weight can be, if the molecular weight is too low, the proportion of production was significantly reduced, the quality can not be guaranteed. It has been proved that polyacrylamide can significantly improve the flexural strength, bond strength, flexural toughness and wear resistance of cement concrete bridge deck pavement, and can reduce the compression ratio, permeability and shrinkage. According to the use of the customer response to the general use of anionic polyacrylamide almost can be applied.