the water reduction rate, air content and other indicators of early-strength water-reducing admixture are the same as those of ordinary water-reducing admixtures. the delayed condensation indicator of the setting time difference is only 90 minutes, which is different from the 120 minutes of ordinary water-reducing agents. in addition, the 1d relative compressive strength reaches 130-140% of the benchmark concrete, and the 3d strength reaches 120-130%, both of which are higher than ordinary water reducing agents. the characteristic of early-strength water-reducing admixture is that the strength growth in the later period is small, only 105-100%.
early-strength water-reducing admixture can be applied to steam-cured concrete and normal temperature, low temperature and negative temperature (the lowest temperature is not lower than -5℃ ) concrete projects with early strength or anti-freeze requirements constructed under conditions. single-component early-strength superplasticizers are various high-efficiency superplasticizers (except sulfamate-based superplasticizers). most early-strength superplasticizers are compound types, consisting of early-strength agent plus ordinary or high-efficiency water-reducing admixtures. the ingredients are not fixed and the varieties are diverse.
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