Problems in the practical application of polycarboxylate superplasticizer in concrete engineering

Effect of water consumption on performance of Polycarboxylic Superplasticizer

The influence of water consumption of Polycarboxylic Superplasticizer is very obvious. In the practical application of concrete engineering, sometimes if the water consumption increases by 1~3kg/m3, the concrete will show serious bleeding, resulting in pitting, sanding, holes and other defects on the concrete surface. The uniformity of concrete pouring and construction quality cannot be guaranteed, resulting in the reduction of the strength and durability of the concrete structure.

Polycarboxylic concrete is easy to delaminate and segregate

In most cases, the addition of Polycarboxylic Superplasticizer concrete will greatly reduce the viscosity of the slurry. At the same time, even if the amount and water consumption of Polycarboxylic Superplasticizer is the best, there will be no bleeding, and the concrete is also easy to delaminate and segregate, which is mainly reflected in the separation of coarse aggregate, mortar and neat mortar, as well as a large amount of settlement. This kind of concrete mixture has no vibration when pouring concrete, and the phenomenon of stratification and segregation is also very obvious.