1. The dosage is 0.4% ~ 2.5% of the total weight of the cementing material, and the commonly used dosage is 0.8% ~ 1.5%.Concrete fitting test should be carried out before use in order to better content.
2. Do not mix it with naphthalene series high-efficiency water-reducing agent. When using polycarboxylic acid water-reducing agent, rinse the mixer and mixer that have used naphthalene series high-efficiency water-reducing agent, otherwise the water-reducing effect may be lost.
3. When using polycarboxylic acid water reducer, it can be added directly in the form of raw liquid or prepared into a solution with a certain concentration, and the amount of water brought into the high-performance water reducer of polycarboxylic acid series can be deducted.
4. As the water reduction rate of concrete mixed with polycarboxylic acid water reducer is larger, the slump is more sensitive to the water consumption, and the water consumption should be strictly controlled when used.
5. Polycarboxylic acid water reducer has good adaptability with most cement, but some cement may have low water reduction rate and large slump loss.In addition, the fineness and storage time of cement may also affect the use of polycarboxylic acid water reducer.At this time, it is suggested to increase the dosage appropriately or mix other retarding components to solve the problem.
6, after the addition of polycarboxylic acid water reducer, the air content of concrete increased (generally 2% ~ 5%) is conducive to improving the workability and durability of concrete, if you need to use in the steamed concrete or have other special requirements, please contact us, we for your timely solution.
7. Due to the small amount and high water reduction rate of polycarboxylic acid water-reducing agent, the use of polycarboxylic acid water-reducing agent to prepare various types of high-performance concrete above C45 can significantly reduce the project cost, with significant technical and economic benefits;Although the cost of polycarboxylic acid water reducer is relatively high, it can reduce the comprehensive cost of concrete by increasing the amount of mineral admixture, and it also has certain technical and economic benefits.
