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Why do angular aggregates better suit freeze thaw than rounded aggregates? -Because angular aggregates have lower...

Why do angular aggregates better suit freeze thaw than rounded aggregates?

-Because angular aggregates have lower absorption. Rounded aggregates have larger critical sizes which can have no impact on freeze thaw.

Is this true? If not, why?

Engineering   Civil-Engineering   
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Answer #1

The angular shapes have larger surface area as compared to the rounded ones with the same mass, so their area of exposure is higher. So it is wrong to say they angular particles have lowwr absorption. On the other hand it will be higher. Rounded sizes has smallest sizes.

On the other hand angular particles has the advantage of better interlocking, and thus perhaps better resistance against any stresses. When they are well graded, they will have less water permeability and higher strength.

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