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Why is it important to include coarse aggregate in concrete?

April 26, 2017aggregate coarse concrete

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Why is it important to include coarse aggregate in concrete?

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In thicknesses above 2 inches, the inclusion of a coarse aggregate (1/4 inch to 9/16 inch) is critical. All portland cement products shrink to a certain extent. Without the addition of coarse aggregate the shrinkage in these applications would likely be unacceptably high.