Journal
CEMENT & CONCRETE COMPOSITES
Volume 84, Issue -, Pages 175-187Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2017.09.006
Keywords
Chloride ions; Corrosion; Ultra high performance concrete; Steel fiber; Mechanical properties
Funding
- Korea Railroad Research Institute, Republic of Korea
- Ministry of Land, Infrastructure and Transport Affairs of the Korean Government [16SCIP-B103706-02]
- Chosun University
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Experimental results on the effects of chloride content of ultra high performance concrete (UHPC) are presented. The experimental variables are the amount of sodium chloride, ranging from zero to 3.0% per cement weight, and matrix strength, including normal mortar and high strength mortar. Sodium chloride is directly mixed with cement matrix in order to simulate harsh environments by promoting the corrosions of fibers and matrix. The effects of chloride content are evaluated in terms of visual observation, electrical resistivity change, compressive strength, bending strength, and dynamic Young's modulus. The experimental results show that UHPC has the superior capability to resist chloride ions due to its dense microstructures, which prevent the growth of rust crystals. Furthermore, the experimental findings suggest that the potentials for corrosion of steel fibers and for corrosion-induced matrix cracking are inconsequential in UHPC even if chloride ions penetrate into UHPC. (C) 2017 Elsevier Ltd. All rights reserved.
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