by In recent years, the fineness of cement products has become finer and the activity has increased, which is related to the accelerated hydration reaction, intensified heat release, and increased drying shrinkage, ultimately leading to an increase in cracks caused by temperature shrinkage and drying shrinkage of concrete.
The increase in microcracks and macroscopic cracks is detrimental to the impermeability and durability of concrete.
The cement used for preparing impermeable concrete requires low water bleeding, slightly lower hydration heat, low impermeability, and minimal drying shrinkage; Volcanic ash cement has low hydration heat, good impermeability, and strong resistance to erosion and corrosion, making it particularly suitable for use in underground and underwater projects with impermeability requirements.
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