mechanism of action
The action mechanism of High Water Reducer Series Polycarboxylate Acid Reducer is as follows: the adsorption layer is formed after the polycarboxylate superplasticizer molecules are adsorbed on the surface of cement particles, which leads to the decrease of the dissolution rate of cement minerals, and the cement hydration rapidly enters the hydration induction period;
Through the coordination of carboxyl groups, the selective adsorption of ion concentration in the solution can reduce the hydration product, delay the nucleation and growth of the hydration product, and thus delay the accelerated hydration period.
In the actual application process, due to the specific requirements of different projects for concrete, that is, the requirements for cement hydration characteristics are different, such as the need to delay the cement hydration process for mass concrete and pumped concrete, and the early strength or frost resistance requirements of concrete. To speed up the cement hydration process, it is necessary to adjust the application of polycarboxylate superplasticizer. The molecular structure design of polycarboxylate water-reducing agent can be carried out in combination with materials with small functions or according to specific requirements.
Scope of application
This High Water Reducer Series Polycarboxylate Acid Reducer after the scope of using polycarboxylic acid water reducing agent, applicable to all kinds of industrial and civil construction of pre mixing cast-in-situ concrete, also suitable for high strength high performance, high durability, superfluid state free vibration self-leveling self-compacting and steel fiber, and other special concrete, precast concrete, long distance transportation of concrete, concrete products, etc.
Specification:
Item | Unit | Standard |
Appearance | / | White or light yellow to brown viscous liquid |
Density | g/cm3 | 1.10±0.02 |
pH value | / | 5-7 |
Solid Content | % | 50±1.0 |
Cl- | % | ≤0.02 |
Total Alkali | % | ≤0.3 |
Water reducing agent can affect the fluidity of concrete. Under the same conditions, adding water reducing agent can change the fluidity of concrete by increasing the collapse degree. Secondly, water reducing agent can affect the condensation speed of concrete, adding water reducing agent can change its condensation speed, thus affecting its use time
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