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Characteristics of Ternary Blended Cement Concrete Using Fly Ash and Silica Fume for Post-Tensioned Concrete Pavement Application  

Choi, Pan-Gil (강원대학교 토목공학과)
Shim, Do-Sick (강원도립대학 건설토목과)
Lee, Bong-Hak (강원대학교 토목공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.9, no.3, 2009 , pp. 41-47 More about this Journal
Abstract
Post-tensioned concrete pavement(PTCP) was developed to built long-span concrete pavement(120 m span) and to maintain long-term service life(over 40 years) of concrete pavement. In the present study, research for high-durable concrete was conducted to utilize the advantage of PTCP construction method efficiently. First of all, 20% of fly ash(by binder weight) was replaced to control alkali silica reaction. Second, silica fume was applied to improve the water-permeability and early-age strength. Results of tests for mechanical properties, water-permeability resistance, and surface-scaling resistance of ternary blended cement concrete showed that the early-age strength was improved significantly with addition of silica fume. The water-permeability resistance was improved from "Low" to "Very Low"(ASTM C 1202). However, surface-scaling resistance was decreased with an increase of silica fume, therefore, content of silica fume should be kept in less than 5%(by binder weight) to assure field application considering durability. The results of air-void analysis showed that durability factors were improved since spacing factors were estimated as 250$\pm$15 micron in adjusted mixtures.
Keywords
Concrete pavement; Post-tensioned concrete pavement; Silica fume; Fly ash;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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