Effect of high sand content on concrete

1. When the amount of sand is the same, if the sand is too coarse, the cohesiveness of the mixed concrete is poor, and it is easy to produce segregation and bleeding;

If the sand is too fine, the total surface area of the sand increases. Although the cohesiveness of the mixed concrete is better and it is not easy to produce segregation and bleeding, the amount of cement increases.

2. Concrete prepared with well-graded sand not only uses less cement slurry and saves cement, but also improves the workability, density and strength of the concrete.

3. The coarseness and particle grading of the sand are determined by sieve analysis.

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