Although the slump has increased, there is still a large amount of seepage and even segregation, which affects the overall uniformity of the concrete. Adding a small amount of water retaining agent has caused a lot of trouble for the construction unit. The sand ratio of concrete also affects the application effect of poly Carboxylate superplasticizer. When using commonly used high-efficiency water reducing agents, the sand ratio can be appropriately increased and the fluidity of concrete can be improved.

When mixed with polycarboxylate superplasticizer, the sand ratio is high and the fluidity of concrete is poor. The product chain of polycarboxylate superplasticizer type water reducing agents with air entrainment contains carboxyl adsorption genes and has a large number of branches. Polyether side chains provide steric hindrance, while polyethers have more breathable properties.

Due to differences in production processes and molecular weight differences in raw materials used by different manufacturers, there is also a significant difference in air entrainment capacity. Among the several poly Carboxylate superplasticizer products we tested, the lower bleed rate was only 3%, the higher was 6%, and some products even reached 8%.

Therefore, when using high-efficiency water reducing agents, it is necessary to conduct testing before formal use, and then mix according to the actual situation of the project.