Thickeners also known as stabilizers, adhesives, plastic agents, water agents, etc. Adding thickener into concrete can increase the viscosity of aqueous solution when the dosage is low. Because the free water in cement slurry is restrained, the clearance between cement particles can be preserved, the friction between particles is reduced, and the mixture is easy to be deformed. As the viscosity increases, the cohesion increases correspondingly, so the segregation resistance of concrete is improved. If the mixing amount is too much and the viscosity is too large, the deformation of cement slurry will be limited, the shear strength will be increased, and the rheological property will be reduced, which is not conducive to the flow of the mixture.