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http://dx.doi.org/10.14190/JRCR.2014.2.1.026

Effects of Mineral Admixture on the Characteristics of Grout for PSC Bridge  

Koh, Kyung-Taek (Korea Institute of Construction Technology)
Ryu, Gum-Sung (Korea Institute of Construction Technology)
Ahn, Ki-Hong (Korea Institute of Construction Technology)
Kang, Su-Tae (Department of Civil Engineering, Daegu University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.2, no.1, 2014 , pp. 26-33 More about this Journal
Abstract
The study investigates the effects of the type, replacement ratio and method of use of mineral admixtures on the fluidity, bleeding ratio, volumetric change and compressive strength of the grout in order to provide basic data for the development of high-quality grout for PSC bridges. In view of the results relative to the type and replacement ratio of the mineral admixtures, it appears that fly ash has practically no effect on the improvement of the fluidity nor on the reduction of bleeding and shrinkage of the grout. On the contrary, blast furnace slag and silica fume appear to have significant effect on the improvement of the fluidity or on the reduction of bleeding and shrinkage of the grout. With regard to the combined use of mineral admixtures, the combination of fly ash and blast furnace slag provides satisfactory fluidity but with significant increase of bleeding and shrinkage, whereas the combination of blast furnace slag and silica fume reduces bleeding and shrinkage but with large loss of the fluidity. On the other hand, the combination of fly ash and silica fume results in satisfactory fluidity accompanied with fair reduction of bleeding and shrinkage of the grout. In view of these results, the type, replacement ratio and method of use of the mineral admixtures are seen to influence the fluidity, bleeding and volumetric change of the grout. Accordingly, it is necessary to select the mineral admixtures considering these effects for their exploitation in the grout of PSC bridges.
Keywords
Grout; PSC bridge; Mineral admixture; Bleeding; Fluidity;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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