2. DH-4004 polycarboxylic superplasticizer can not be mixed with naphthalene superplasticizer. When using polycarboxylic superplasticizer, the mixer and mixer that used naphthalene superplasticizer must be washed out, otherwise the water reducing effect may be lost.
3. When using polycarboxylic high-performance water reducer, it can be directly added in the form of raw liquor, or can be prepared into a certain concentration of solution for use, and deduct the amount of water brought by polycarboxylic high-performance water reducer itself.
4. Because of the high water reduction rate of concrete with polycarboxylic high performance water reducer, the slump is sensitive to water consumption, so water consumption must be strictly controlled.
5. Polycarboxylic superplasticizer has good adaptability to most cement, but it may have low water reducing rate and large slump loss for individual cement. In addition, the fineness and storage time of cement may also affect the use effect of polycarboxylic high performance water reducer. At this time, it is suggested to increase the dosage or compound other retarding components to solve the problem.
6. After mixing with polycarboxylic high-performance water reducer, the air content of concrete increases (generally 2%-5%) which is beneficial to improving the workability and durability of concrete. If it needs to be used in steam cured concrete or has other special requirements, please contact us and we will solve it for you in time.
7. Because of the small liquid content and high water reducing rate of polycarboxylic superplasticizer, the use of polycarboxylic superplasticizer to prepare all kinds of high performance concrete above C45 can greatly reduce engineering cost and have remarkable technical and economic benefits. It is used to prepare concrete below C45 grade, although polycarboxylic superplasticizer is used as high performance superplasticizer. The cost is on the high side, but the comprehensive cost of concrete can be reduced by increasing the amount of mineral admixture, which also has certain technical and economic benefits.