High Volume Fly Ash Concrete for Hydraulic Engineering in Cold and Arid Regions

QIN Zi-peng; DU Ying-ji; TIAN Yan

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Journal of Changjiang River Scientific Research Institute ›› 2013, Vol. 30 ›› Issue (9) : 101-105.

HYDRAULIC STRUCTURE AND MATERIAL

High Volume Fly Ash Concrete for Hydraulic Engineering in Cold and Arid Regions

QIN Zi-peng, DU Ying-ji, TIAN Yan

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Abstract

The freeze-thaw damage of concrete is a severe problem for hydraulic structure in cold and arid regions in Northwest China. In this research, we investigated the mechanical properties, freeze-thaw resistance and impermeability of fly ash concrete with uniform strength and water-cement ratio at different ages. The strength of high volume fly ash concrete in the early stage was lower than common ones, but the strength grew rapidly in the mid-late ages. The freeze-thaw resistance, self-healing ability and the impermeability of fly ash concrete with uniform strength were not significantly weakened when fly ash content was increased. When the water-cement ratio and the fly ash content were 0.35 and 50% respectively, the mechanical properties, freeze-thaw resistance and impermeability of the concrete were prominent and able to meet the requirements of water project construction in the northwest cold and arid regions.

Key words

cold and arid regions / fly ash content / curing time / concrete

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QIN Zi-peng, DU Ying-ji, TIAN Yan. High Volume Fly Ash Concrete for Hydraulic Engineering in Cold and Arid Regions[J]. Journal of Changjiang River Scientific Research Institute. 2013, 30(9): 101-105

References

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