Post Date:20,May,2024

7. When the polycarboxylic acid admixture is trial-mixed (in production), when only the basic dosage is reached, the initial working performance of the concrete will be satisfied, but the concrete loss will be greater; therefore, during trial-mixing (production), the amount should be increased appropriately. Only by adjusting the dosage (that is, reaching the saturation dosage) can the problem of large slump loss be solved.

8.After reducing the amount of cementitious materials, the water-cement ratio should be more strictly ensured during the production process. If the slump loss is large, the only way is to increase the amount of admixture and add the admixture twice. Do not add water to solve the problem, otherwise it will easily cause a significant decrease in strength.

9. Polycarboxylate water-reducing agent is a product with high water-reducing rate and high dispersion. In production control, the fluidity index (expansion) of concrete should be used to measure the workability of concrete. Slump can only be used as a reference value.

10. The strength of concrete is mainly determined by the water-binder ratio. Polycarboxylate water-reducing agent has the characteristics of high water-reducing rate, which can easily reduce the water consumption in the production mix ratio, thereby achieving the purpose of reducing the water-binder ratio and reducing the concrete’s strength. comprehensive cost. Since raw materials fluctuate more during production than during testing, in order to better utilize the performance of polycarboxylate superplasticizer products, admixtures should be adjusted in a timely manner according to the impact of raw material conditions, ambient temperature changes, etc. on the workability of concrete during production. Dosage.

11. Polycarboxylic acid water-reducing agents cannot be mixed with naphthalene-based water-reducing agents. When using polycarboxylic acid water-reducing agents, the mixer and mixer truck that has used naphthalene-based water-reducing agents must be washed clean, otherwise the polycarboxylic acid water-reducing agent may be damaged. The water-reducing agent loses its water-reducing effect.

12. Polycarboxylate superplasticizer should avoid long-term contact with iron materials. Since polycarboxylate water-reducing agent products are often acidic, long-term contact with iron products will cause a slow reaction, which may even darken or blacken the color, resulting in a decline in product performance. It is recommended to use polyethylene plastic buckets or stainless steel buckets for storage to ensure performance stability.