The specific surface area of sand particles is larger than that of coarse aggregates.
As the sand ratio increases, the number of fine particles increases, the specific surface area increases, and the amount of water adsorbed on the surface of the aggregate increases, playing a good role in water retention.
In addition, an increase in sand ratio leads to an increase in the sand content in the mortar.
With a constant water consumption, the consistency of the mortar increases and its water retention performance improves.
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