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http://dx.doi.org/10.14190/JRCR.2017.5.4.466

Changes in Service life in RC Containing OPC and GGBFS Considering Effects of Loadings and Cold Joint  

Kim, Hyeok-Jung (Elastomer TS&D Team, KUMHO PETROCHEMICAL R&BD)
Kwon, Seung-Jun (Department of Civil Engineering, Hannam University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.5, no.4, 2017 , pp. 466-473 More about this Journal
Abstract
RC (Reinforced Concrete) member has varying service life due to varying diffusion characteristics with loading conditions even if it is exposed to constant exterior conditions. In the paper, quantitative parameters are obtained through adopting the previous results for effects of compressive, tensile, and cold joint on chloride diffusion in OPC (Ordinary Portland Cement) and GGBFS (Ground Granulated Blast Furnace Slag) concrete. Service life is evaluated in RC simple beam with 10.0m of span through increasing loading from self weight (2.5kN/m) to the loading to cracking moment (5.5kN/m). In OPC concrete without cold joint, service life changes to 89.4% for tensile region and 101% for compressive region with loadings while GGBFS concrete has 80.0% and 106%, respectively. For cold joint area, GGBFS concrete shows much reduced service life to 82~80% in compressive region and 69~61% in tensile region, which is caused by the lower diffusion in normal condition but relatively higher increasing cold joint effect than OPC concrete.
Keywords
Cold joint; Loading condition; Chloride diffusion coefficient; Service life; GGBFS;
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Times Cited By KSCI : 4  (Citation Analysis)
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