Evaluation of different treatments to improve the durability of concrete having deleterious chert particles as its coarse aggregate

• Main Author: Ahmed, Naseem
• Other Authors: Civil Engineering
• Format: Others
• Published: Virginia Tech 2014
• Subjects: LD5655.V855 1964.A394; Chert; Concrete > Testing; Frost resistant concrete
• Online Access: http://hdl.handle.net/10919/43030; http://scholar.lib.vt.edu/theses/available/etd-06102012-040113/

<p>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:</p> <p>1. Removal of cherts lighter than the BSSD specific gravity of 2.5 by heavy liquid definitely improved the durability of the concrete.</p> <p>2. 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.</p> <p>3. As much as 12 percent chert could be blended with durable aggregate without an appreciable reduction in durability.</p> === Master of Science