ACI 363R-10 - Report on High-Strength Concrete - download pdf or read online

By ACI

ISBN-10: 0870314610

ISBN-13: 9780870314612

This record summarizes at present to be had information regarding excessive energy concrete (HSC). themes mentioned comprise choice of fabrics, concrete combination proportions, ordering, batching, blending, transporting, putting, quality controls, concrete houses, structural layout, monetary concerns, and functions.

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7-1), whereas columns with large volumetric ratios failed at loads greater than those predicted using Eq. (7-1). Those columns with low volumetric ratios tended to exhibit spalling of the concrete cover before the confinement engaging the core concrete. Research has also shown that the parameter ρs fy/fc′ can be related to the ductility of HSC columns increasing the strain limit and flattening the negative slope of the stress-strain curve past the point of peak stress (Razvi and Saatcioglu 1994).

1965) in Fig. 9 that the temperature rise of HSCs will be approximately 11 to 15°F per 100 lb/yd3 (10 to 14°C per 100 kg/m3) of cement. Values for temperature rise on the order of 100°F (56°C) in HSC columns containing 846 lb/yd3 (502 kg/m3) of cement were measured in a building in Chicago, as shown in Fig. 10 (CCHRB 1977). This temperature rise can often be controlled or reduced by using SCMs as replacement materials instead of cement. 15 was reported to range from 5 to 11°F per 100 lb/yd3 (5 to 10°C per 59 kg/m3) of cementitious material for mixtures with 30 to 32% fly ash replacement.

Thus, it is likely that strains due to drying shrinkage only will develop slower in HSC. From a practical viewpoint, the importance of volume change in concrete relates mainly to cracking potential. To the extent that volume change issues in HSC are not totally understood, there exists a comparable lack of understanding of cracking potential in HSC due to noninduced phenomena. Wiegrink et al. (1996) concluded that HSCs they tested had poorer shrinkage cracking performance than normalstrength concrete.

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