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

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

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Civil Engineering

Department dc:contributor.department

Civil Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

1964

Author dc:creator

• Ahmed, Naseem

Chair dc:contributor.committeechair

• Walker, Richard D.

Committee members dc:contributor.committeemember

• Payne, William W.
• Gray, George A.
• Morris, Henry M.

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-06102012-040113

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/43030