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http://dx.doi.org/10.4334/JKCI.2007.19.5.577

Effect of Mechanical Restraint due to Steel Microfibers on Alkali-Silica Reaction in Mortars  

Yi, Chong-Ku (Dept. of Civil Environmental and Architectural Engineering, Korea University)
Publication Information
Journal of the Korea Concrete Institute / v.19, no.5, 2007 , pp. 577-584 More about this Journal
Abstract
The effect of steel microfibers (SMF) on alkali-silica reaction (ASR) was investigated using two types of reactive aggregates, crushed opal and a pyrex rod of constant diameter. Cracks are less visible in the SMF mortars compared with the unreinforced mortars. Due to crack growth resistance behavior in SMF mortar specimens, the strength loss is eliminated and the ASR products remained well confined within the ASR site. The expansion and the ASR products were characterized by microprobe analysis and inductively coupled plasma (ICP) spectroscopy. The confinement due to SMF resulted in a higher Na and Si ion concentration of the ASR liquid extracted from the reaction site. The higher concentration reduced the ASR rate and resulted in a lower reactivity of the reactive pyrex rods in SMF mortars.
Keywords
akali-silica reaction; microcracking; expansion; tensile properties; fiber reinforcement;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Sprung, S. and Adadian, M., 'The Effect of Admixtures on Alkali-Aggregate Reaction in Concrete', Proceedings, Symposium on Effect of Alkalis on the Properties of Concrete, London, Sept., Cement and Concrete Association, Wexham Springs, Slough, 1976, pp.125-137
2 MacCoy, E. J. and Caldwell, A. G., 'New Approach to Inhibiting Alkali-Aggregate Expansion', J. Am. Concr. Inst., Vol.22, 1951, pp.693-706
3 Diamond, S. and Ong, S., 'The Mechanisms of Lithium Effects on ASR', Proceedings of the 9th International Conference on Alkali Aggregate Reaction, Concrete Society of UK, London, 1992, pp.269-278
4 Hobbs, D. W., 'Deleterious Expansion of Concrete due to Alkali-Silica Reaction: Influence of PFA and Slag', Magn. Concr. Res., Vol.36, 1986, pp.191-205
5 Diamond, S., 'Alkali Silica Reaction-Some Paradoxes', Cem. Concr. Compos., Vol.19, 1997, pp.391-401   DOI   ScienceOn
6 St. John, D. A. and Freitag, S. A., 'Fifty Years of Investigation and Control of AAR in New Zealand', Alkali-Aggregate Reaction in Concrete, Proceedings of the 10th International Conference, Melbourne, 1996, pp.150-157
7 Kawamura, M. and Fuwa, H., 'Effect of Lithium Salts on ASR Gel Composition and Expansion of Mortars', Cem. Concr. Res., Vol.33, 2003, pp.913-919   DOI   ScienceOn
8 Prezzi, M., Monteiro, P. J. M., and Sposito, G., 'The Alkali-Silica Reaction, Part I: Use of the Double-Layer Theory to Explain the Behavior of Reaction-Product Gels', ACI Mat. J., Vol.94, No.1, 1997, pp.10-17
9 Oberholster, R. E. and Roy, D. M., 'The Effectiveness of Mineral Admixtures in Reducing Expansion due to the Alkali-Aggregate Reaction with Malmesbury Group Aggregates', Proceedings of the 5th International Conference on Alkali-Aggregate Reaction in Concrete, Cape Town, National Building Research Institute, Pretoria, 1981, Article S252/31
10 Yi, C. K. and Ostertag, C. P., 'Strengthening and Toughening Mechanisms in Microfiber Reinforced Cementitious Composites', J. Mater. Sci., Vol. 36, 2001, pp.1513-1522   DOI   ScienceOn
11 Juenger, M. C. G. and Ostertag, C. P., 'Alkali-Silica Reactivity of Large Silica Fume-Derived Particles', Cem. Concr. Res., Vol.34, No.8, 2004, pp.1389-1402   DOI   ScienceOn
12 Koyanagi, W., 'Characteristics and Simulation of Concrete Cracks Caused by AAR', Proceedings of the 8th International Conference on Alkali Aggregate Reaction, Kyoto, 1989, pp.845-850
13 홍승호, 한승환, 윤경구, '알칼리-실리카 반응에 의한 시멘트 콘크리트 포장 파손 사례', 콘크리트학회 논문집, 18권 3호, 2006, pp.355-360   과학기술학회마을   DOI
14 McGown, J. K. and Vivian, H. E., 'Studies in Cement-Aggregate Reaction, XXIII: The Effect of Superincumbent Load on Mortar Bar Expansion', Aust. J. Appl. Sci., Vol.5, 1954, pp.94-97
15 Yamura, K., 'Effect of Steel Reinforcement on Alkali Silica Reaction of Concrete', J. Soc. Mater. Sci. Jpn., Vol.43, 1994, pp.970-975   DOI   ScienceOn
16 Ahmed, T., Burley, E., and Rigden, S., 'Effect of Alkali-Silica Reaction on Bearing Capacity of Plain and Reinforced Concrete', ACI Mater. J., Vol.96, 1999, pp.557-570
17 Aquino, W., Lange., D. A., and Olek, J., 'The Influence of Mtakaolin and Silica Fume on the Chemistry of Alkali-Silica Reaction Products', Cem. Concr. Compos. Vol.23, 2001, pp.485-493   DOI   ScienceOn
18 Powers, T. C. and Steinmour, H. H., 'Part I-The Chemical Reactions and Mechanisms of Expansion', ACI J., Vol.26, 1955, pp.497-515
19 ASTM C 1260-94, Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method), Annual Book of ASTM Strandards v.04.02, Concrete and Aggregates, American Society for Testing and Materials, Philadelphia, 1999, pp.650-653
20 Ostertag, C. P. and Yi, C. K., 'Quasi-Brittle Behavior of Cementitious Matrix Composites', Mater. Sci. Eng. A, Vol.278, 2000, pp.95-98
21 Bleszynski, R. F. and Thomas, M. D. A., 'Microstructural Studies of Alkali-Silica Reaction in Fly Ash Concrete Immersed in Alkaline Solution', Adv. Cem. Based Mater., Vol.7, 1998, pp.66-78   DOI   ScienceOn
22 Durand, B., Berard, J., and Roux, R., Soles, J. A. 'Alkali-Silica Reaction: the Relation between Pore Solution Characteristics and Expansion Test Results', Cem. Concr. Res., Vol.20, 1990, pp.419-328   DOI   ScienceOn
23 Sposito, G., The Surface Chemistry of Soils, Oxford University Press, New York, 1984
24 Clayton, N., 'The Effects of Alkali Silica Reaction on the Strength of Prestressed Concrete Beams', Struct. Engr., Vol.68, 1990, pp.287-292
25 Turanli, L., Shomglin, K., Ostertag, C. P., and Monteiro, P. J. M., 'Reduction in Alkali-Silica Expansion due to Steel Microfibers', Cem. Concr. Res., Vol.31, 2001, pp.827-835   DOI   ScienceOn