Toluene diisocyanate manufacturer Knowledge Performance and uses of expansion agents

Performance and uses of expansion agents

Performance and uses of expansion agents

1. The magnesium oxide content in the expansion agent shall not exceed 5% (except for the magnesium-containing expansion agents currently on trial). The later expansion of magnesium will cause the hardened concrete structure to crack. The most important physical properties are that the expansion at 7 days of age should not be less than 0.025% and the shrinkage rate (i.e. negative expansion) of 7 days in water + 21 days of curing in air should not be large, so that it is a high-quality expansion agent.
2. Expansion agents are mainly used to prepare shrinkage-compensating concrete, expansion concrete for filling and expansion mortar for grouting.

Concrete mixed with expansion agent is suitable for reinforced concrete projects and filled concrete projects.

The expansion-compensating shrinkage concrete rigid roof is suitable for use in southern areas.

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