Durability of Silica Fume Concrete Exposed to Chloride in Hot Climates
Publication: Journal of Materials in Civil Engineering
Volume 13, Issue 1
Abstract
The premature deterioration of reinforced concrete structures is a serious problem in hot coastal environments. Most of this deterioration is caused by chloride ingress through the concrete, resulting in the corrosion of the reinforcing steel. Since the mid 1990s the practice of specifying silica fume in concrete has widened in the Middle East, as engineers work to improve the durability of concrete, which is subjected to the extreme exposure conditions in the region. Current practice is to use mixtures with a maximum water/cement ratio of 0.4 and to replace 5% to 10% of the cement with silica fume depending on the degree of exposure. Are these small amounts of silica fume sufficient to maintain an appropriate life span for concrete structures under the varying exposure conditions, and how much cover is required to the reinforcement to protect the steel from corrosion? In this paper, models are proposed to estimate the chloride ion ingress into portland cement concrete and silica-fume-enriched concrete under different exposure conditions. The results show that small amounts of silica fume are sufficient as long as appropriate concrete covers to reinforcement are maintained and chloride exposure to the concrete is correctly assessed.
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References
1.
ARAMCO. ( 1994). The Saudi Arabian Oil Company concrete specification 09 SAMSS-097, Clause 5.1, Saudi Aramco, Dhahran, Saudi Arabia.
2.
Askeland, D. ( 1989). “Chapter 5.” The Science and Engineering of Materials, PWS, Boston.
3.
Akili, W., Manser, I., and Logan, K. ( 1994). “Condition survey and repair strategy of deteriorated concrete wharves in Qatar, RCM-47.” Proc., 1st Int. Conf. on Reinforced Concrete Mat. in Hot Climates, Al Ain, United Arab Emirates, 692–693.
4.
Bamforth, P. B. ( 1995). “Improving the durability of concrete by the use of mineral additions.” Concrete Durability in the Arabian Gulf, Bahrain Society of Engineers, Manama, Bahrain, Section 20, p. 9.
5.
Berke, N. S., and Hicks, M. C. ( 1993). “Predicting chloride profiles in concrete.” The NACE Ann. Conf. and Corrosion Show, NACE, Houston, Paper 341, 1–15.
6.
Bijen, J., and Al Rabiah, A. R. ( 1994). “The performance of blast furnace slag concrete's in a hot marine environment.” Proc., 1st Int. Conf. on Reinforced Concrete Mat. in Hot Climates, Al Ain, United Arab Emirates, 600–613.
7.
CIRIA. ( 1984). “The CIRIA guide for concrete construction in the Gulf Region.” Spec. Pub. 31, Construction Industry Research and Information Association, Ministry of Housing and Construction, Department of the Environment, London, 91–93.
8.
Detwiler, R. J., Whiting, D. A., and Langergren, E. S. ( 1999). “Statistical approach to ingress of chloride ions in silica fume concrete for bridge decks.” ACI Mat. J., 93(6), 670–675.
9.
Hussain, S. E. ( 1991). “Mechanisms of high durability performance of plain and blended cements.” PhD thesis, King Fahad University of Petroleum and Minerals, Dhahran, Saudi Arabia, A1H888.
10.
Maage, M., Helland, S., Poulsen, E., Vennesland, O., and Carlsen, J. E. ( 1996). “Service life prediction of existing concrete structures exposed to marine environments.” ACI Mat. J., 93(6), 602–608.
11.
Malikakkal, N. C. ( 1994). “Chloride diffusion in concrete. Prediction of the onset of corrosion in reinforced concrete structures.” Master's thesis, King Fahad University of Petroleum and Minerals, Dhahran, Saudi Arabia.
12.
Rasheeduzzafar. ( 1992). “Material selection for durable concrete in the Gulf Region.” Civ. Engrg in the Envir. of Saudi Arabia, Proc., 1st Annu. Seminar, ASCE, Saudi Arabian Section, New York, 121.
13.
Rasheeduzzafar, and Hussain, S. E. ( 1993). “Durability mechanisms of blended cement concretes.” Proc., 4th Int. Conf. on Deterioration and Repair of Reinforced Concrete in the Arabian Gulf, Vol. II, 909–926.
14.
Rasheeduzzafar, Al Ghatani, A. S., and Al Saadoun, S. S. ( 1989). “Influence of construction practices on concrete durability.” ACI Mat. J., 86(6), 566–575.
15.
Royal Commission of Jubail and Yanbu. ( 1995). “Guideline specification for Portland Cement Concrete.” Document PD0334715, Saudi Arabian Bechtel Company for the Royal Commission of Jubail and Yanbu, Madinat al Jubail Al Sinaiyah, Saudi Arabia, Appendix 1, Clause 3.01.3, 12–14.
16.
Saudi Consolidated Electricity Company. ( 1995). “Ready mixed concrete.” Specification 71-SMSS-%-Rev3, Dammam, Saudi Arabia, Clause 4.2.6, 13–14.
17.
Sharafi, A., Mukhlis, and Chetty, S. ( 1994). “Anticorrosion products for more durable concrete in the Arabian Gulf.” Proc., 1st Int. Conf. of Reinforced Concrete Mat. in Hot Climates, Al Ain, United Arab Emirates, RCM-43, 634.
18.
Wee, T. H., Wong, S. F., Lim, H. B., Mah, P. K., and Chia, K. S. ( 1999). “Performances of blended cement concretes in a marine environment.” Extending the Performance of Concrete Structures, Proc., Int. Seminar, University of Dundee, Scotland, U.K., 261–271.
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Received: Feb 2, 1999
Published online: Feb 1, 2001
Published in print: Feb 2001
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