Using lithium compounds as an admixture in new concrete and as a post-treatment for existing concrete affected by alkali-silica reaction

This research project, funded by the Federal Highway Administration Project DTFH61-02-R-00097 and the Texas Department of Transportation Project 0-4085, concentrates on two individual aspects of the use of lithium compounds to mitigate or prevent deterioration due to alkali-silica reaction (ASR). The first objective of the project is the assessment of the current test methods available for testing the efficacy of lithium nitrate as an admixture. The two test methods used were ASTM C 1260 and ASTM C 1293 and their modifications, and in addition, exposure blocks were cast to simulate field behavior. After an extensive study conducted jointly at the University of Texas, CANMET (Ottawa), and the University of New Brunswick, evidence of major differences between the amounts of lithium nitrate suggested by each test method became apparent. This thesis seeks to identify these differences as well as describes the first attempt in defining a modified accelerated test method to accurately predict the amount of lithium nitrate needed to prevent ASR-induced expansion. Secondly, this thesis addresses the feasibility of using several modifications of the ASTM C 1260 test method in an effort provide guidance on treating existing structures with lithium compounds already suffering from ASR-induced expansion and cracking

Author dc:creator

• Barborak, Ryan Christopher

Contributors dc:contributor

• Folliard, Kevin J.

Statement dc:rights

• Restricted
• Copyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.

Language dc:language

eng

Identifier

http://dx.doi.org/10.26153/tsw/41701

OAI identifier oai:identifier

oai:tdl-ir.tdl.org:2152/114798