CONCRETE IN HOT ENVIRONMENTS - CHAPTER O ppt

... in the form of guidelines for hot climate concreting. This book is not intended as one more guide, but mainly to explain the influence of hot environments on the properties and behaviour of concrete, ... and S.Mindess Concrete in the Marine Environment P.K.Mehta Concrete in Hot Environments I.Soroka Durability of Concrete in Cold Climates M.Pigeon and R.Pleau (forthco...

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... effect of the increased strength on shrinkage outweighs the opposing effect of the corresponding increase in the modulus of elasticity. (3) Joints should be provided in concrete members in order to ... hot- humid environment. In Proc. RILEM 2nd Int. Symp. on Concrete and Reinforced Concrete in Hot Countries, Haifa, 1971, Vol. I. Building Research Station—Technion, Israel, I...

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... is, in changing the cement composition, a variation in the C 3 S content usually involves a corresponding variation in the opposite direction in the C 2 S content. Similarly, a variation in the ... resistance of concrete. In Performance of Concrete, ed. E.G.Swenson. University of Toronto Press, Toronto, Canada, 1968, pp. 66–76. Copyright 1993 E & FN Spon is provided, both...

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... hydration of OPC varies, depending on its mineralogical composition, from 420 to 500J/g. The relation between the mineralogical composition and heat of hydration, and the utilisation of this relation ... concrete remains workable and can be handled properly at the building site. In fact, this phenomenon of slump loss constitutes one of the major problems of hot- weather concreting and is...

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... reinforced concrete. The effect of pozzolans and of other admixtures on possible corrosion of the reinforcing steel in concrete is discussed in some detail in Chapter 10. At this stage, however, ... by-product of the pig iron industry, in which iron ores, mainly oxides of iron, are reduced to metallic iron. The iron ores contain a certain amount of impurities, which are mainly S...

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... concrete in thin and heavily reinforced sections. Flowing concrete may be useful also in hot weather conditions in order to overcome the adverse effect of the high temperatures on slump loss. It ... and the method of determining the consistency, on the other; n is also a constant which depends, again, on the method of determining the consistency but not on concrete composition....

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... hot humid environment. In Proc. RILEM 2nd Int. Symp. on Concrete and Reinforced Concrete in Hot Countries, Haifa, 1971, Vol. II, Building Research Station—Technion, Israel Institute of Technology, ... Spon glass-fibres are mostly used, the former two mainly on the building site, and the latter mainly in the production of glass-fibre-reinforced concrete products, commonly known...

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... recom- mended to have pockets or windows at mid-height or other intervals to facilitate placing and vibrating the con- crete. 6.2.6 Economy of Conventional Wall Formwork Conventional wall formwork ... long. Openings/Inserts Jumps forms are best suited to building designs in which the open- ings are regularly occurring from floor to floor. The existence of openings, blockouts, and inserts slow...

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... Ishai, O. , Time-dependent deformational behaviour of cement paste, mortar and concrete. In Proc. Conf. Structure of Concrete and Its Behaviour Under Load. London, 1965, Cement and Concrete Association, ... environment. In Proc. RILEM Symp. on Concrete and Copyright 1993 E & FN Spon in areas of hindered adsorption (Chapter 7, Fig. 7.3), is squeezed out into bigger pores (ar...

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... a slag content of 65– 70% or more, are recommended for use in controlling sulphate attack. Fig. 9.8. Sulphate expansion of concrete containing low-calcium fly-ash of different compositions marked ... oxygen and carbon dioxide) and chloride ions, both which play an important role in the corrosion of the reinforcing steel. Porous concrete, on the other hand, allows the aggressive water t...

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