Evaluation of different treatments to improve the durability of concrete having deleterious chert particles as its coarse aggregate
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Date
1964-09-05
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Virginia Tech
Abstract
On the basis of freezing and thawing tests of air-entrained concretes having poor quality cherts as course aggregates subjected to three different treatments for improving durability, the following conclusions have been derived:
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Removal of cherts lighter than the BSSD specific gravity of 2.5 by heavy liquid definitely improved the durability of the concrete.
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Combining 50 percent durable aggregate (1/2"-1/4" size) with 50 percent cherts (1"-1/2" size) did not show any significant improvement in durability over that containing 100 percent chert.
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As much as 12 percent chert could be blended with durable aggregate without an appreciable reduction in durability.