Durability of Portland Cement- Silica Fume Mixes in Tidal Zone

سال انتشار: 1384
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,419

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شناسه ملی سند علمی:

ICCD02_CD5-009_6882175643

تاریخ نمایه سازی: 29 مهر 1384

چکیده مقاله:

In the past couple of decades the use of Silica Fume (S.F.) as a supplementary cementing materials has been extensively increased in concretes used for marine structures in the Persian gulf regions. The reason for this is claimed to be for improving the durability of coastal structures (including within the tidal zone) by the consultant engineers. In this research the performance of cement paste and concrete mixes incorporating 7 and 10 percent of silica fume as a cement replacement have been investigated in three exposure conditions, i.e. in fresh portable water, in coastal tidal zone and in laboratory simulation ponds. The performance of both plain and blended cements was evaluated by measuring the compressive strength, reduction in compressive strength and capillary absorption. The results show that plain type II Portland cement performs better than S.F. incorporated mixes under cyclic wetting and drying condition. The results also indicate that silica fume incorporated specimens under cyclic wetting and drying condition exhibit higher strength loss when compared with plain type II Portland cement or/and when cured under potable water. Inaddition the greater silica fume amount used in the mixes, the more water absorption bycapillary when exposed within tidal zone or/and under wetting and drying simulation. Further, the effect on incorporating GGBS (Ground Granulated Blast furnace Slag) on theperformance of the S.F. mixes in the three different exposure conditions was also investigated. The blended GGBS mix was the worst performing mix in the all three exposure conditions. This paper summarises the investigations conducted to assess the durability of plain and blended type II Portland cement exposed to marine tidal environments.

کلیدواژه ها:

Concrete Durability ، Silica Fume ، Granulated Blast Furnace Slag ، Tidal Zone ، Simulation

نویسندگان

Esmaiel Ganjian

school of Science and the Environment, Coventry University, UK.

Homayoon Sadeghi Pouya

University of Sheffield leading to Ph. D. in Civil Engineering.

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  • Mather, B., ،Effects of seawater _ concrete? Highway Research records, ...
  • Wood, H., *Durability of concrete construction? ACI Monograph No. 4, ...
  • Gjorv, O. E., *Long-term durability of concrete in seawater* ACI ...
  • Mehta, P.K., *Durability of concrete in marine environment _ a ...
  • Conjeaud, M. L., ،، Mechanism of seawater attack on cement ...
  • Regourd, M., ، }Phy sico-chemical studies of cement pastes, mortars ...
  • Eglinton, M. S., 44Concrete and its chemical behaviour? Thomas Telford ...
  • Gerwick, B. C., «International experience in the performance of marine ...
  • Hoff, G. C., *Durability of offshore and marine concrete structures? ...
  • Al-Amoudi, O. S. B., *Durability of plain and blended cements ...
  • Al-Ghamdi, H. A., ،Effect of curing and mix design on ...
  • Ghoddousi, P., Ganjian, E., Parhizkar, T. and Ramez anianpo ur, ...
  • Ganjian. E. and Sadeghi Pouya, H., ،effect of magnesium and ...
  • Wee, T. H., Suryavanshi, A.K., Wong, S. F. and Rahman, ...
  • Mehta, P.K., ،، Mechanisms of expansion associated with ettringite formation? ...
  • Habibi, M. K., «Performance of Silica Fume concrete in the ...
  • fume in concrete* ACI Materials Journal No. 84, (1987), Silica؟، ...
  • ACI committee 232, ،Natural pozzolans in concrete? ACI Materials Journal ...
  • Goldman, A. and Bentur, A., ،Bond effects in hih strength ...
  • Malhotra, V.M., Carette, G.G. and _ ivasundaram, V., _ of ...
  • Tamimi, A. K., «Hi gh -performance concrete mix for an ...
  • Ganjian, E., Ghodosi, p. and Parhizkar, T., ،، Mechanical properties ...
  • B.S. 1881, Part 116, ، «Rec Ommen dations for the ...
  • -11.2, Absorption of water by concrete by capillarity TC14-CPC, 1982, ...
  • Cohen, M.D. and Bentur, A., «Durability of Portland cement - ...
  • 20 40 60 80 100 120 140 160 180 200 ...
  • 20 40 60 80 100 120 140 160 180 200 ...
  • 20 40 60 80 100 120 140 160 180 200 ...
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