With the progress of The Times, retarder also has a qualitative leap. Sodium hexametaphosphate is the retarder commonly used in polycarboxysalt. It is a kind of admixture that can delay cement hydration reaction, so as to prolong the setting time of concrete, so that the fresh concrete in a long time to maintain plasticity, convenient pouring, improve construction efficiency, and at the same time, the performance of concrete in the late period will not cause adverse effects.
With the progress of The Times, retarder also has a qualitative leap. Sodium hexametaphosphate is the retarder commonly used in polycarboxysalt. It is a kind of admixture that can delay cement hydration reaction, so as to prolong the setting time of concrete, so that the fresh concrete in a long time to maintain plasticity, convenient pouring, improve construction efficiency, and at the same time, the performance of concrete in the late period will not cause adverse effects.
The main bonding mechanism of sodium hexametaphosphate, sodium hexametaphosphate after absorbing water in viscose, it has close relationship with the properties of sodium hexametaphosphate itself, the formula for sodium hexametaphosphate belongs to a kind of composition of phosphate, sodium hexametaphosphate anion has a high molecular weight, generally contain PO3 gene number is as high as 20-100, and form a long chain.
Operating conditions:
1. Select admixture types according to concrete performance requirements
2. The dosage of admixture must be determined by trial match
3. Make technical operation disclosure to workers before starting work.
4. Appoint a special person to supervise the measurement work
5. Prepare the amount of admixture for this operation
Post time: Aug-08-2022