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http://dx.doi.org/10.4334/JKCI.2016.28.5.519

Evaluating Shrinkage Characteristic of Ternary Grout for PSC Bridge Using Expansive Additive and Shrinkage Reducing Agent  

Yuan, Tian-Feng (School of Civil, Environmental and Architectural Engineering, Korea University)
An, Gi-Hong (Structural Engineering Research Division, Korea Institute of Construction Technology)
Ryu, Gum-Sung (Structural Engineering Research Division, Korea Institute of Construction Technology)
Koh, Kyoung-Taek (Structural Engineering Research Division, Korea Institute of Construction Technology)
Yoon, Young-Soo (School of Civil, Environmental and Architectural Engineering, Korea University)
Publication Information
Journal of the Korea Concrete Institute / v.28, no.5, 2016 , pp. 519-525 More about this Journal
Abstract
This paper reports on analyzing the free and restrained shrinkage characteristic of ternary grout used cementitious admixture. In this study, the cementitious admixture was used such as fly ash, ziricania silica fume by combination of expansive additive (a, b) and shrinkage reducing agent. And a number of basic performance tests were conducted to investigate bleeding, volume change, fluidity and compressive strength behavior. According to the results, within appropriate mixing ratio, even the fluidity is not influenced by expansive additive and shrinkage reducing agent, the resistant properties of bleeding, volume change, shrinkage and compressive strength are increased. Comparing with plain grout, the free shrinkage reduced by a minimum of 29% which specimens are added expansive additive and shrinkage reducing agent. The combination of expansive additive a and shrinkage reducing agent is the most effective for reduction of shrinkage. And increasing the mixing ratio of expansive additive and shrinkage reducing agent extended cracking time. Nevertheless, combined addition of expansive additive a 2.0% and shrinkage reducing agent 0.50% has best shrinkage reduction behavior and not appeared cracking. From the above, the mixing ratio of 2.0% of expansive additive a and 0.50% of shrinkage reducing agent is high performance ternary grout for PSC bridge.
Keywords
ternary grout; shrinkage cracking; expansive additive; shrinkage reducing agent;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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