Discussion of Mix Proportions of Concrete for Long-Distance Pumping

Hiroshi Nemoto; Shigeyuki Date; Shinchiro Hashimoto

doi:10.4028/www.scientific.net/KEM.744.32

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 744Discussion of Mix Proportions of Concrete for...

Discussion of Mix Proportions of Concrete for Long-Distance Pumping

Abstract:

Long-distance pumping of concrete (up to 2000 m, with relay pumps installed at two locations) was carried out for placing invert concrete at a caisson—the construction site of a spillway discharge section. After quantifying the required performance and determining of the mix proportions of the invert concrete that would be used in the long-distance pumping, the authors focused on thixotropy as a factor that affects the pumping load. Through laboratory tests and using AE and a high-range water reducing agent with high dispersion effect, retention and pumpability enhancing admixture were found to be effective in reducing thixotropy.

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Periodical:

Key Engineering Materials (Volume 744)

Pages:

32-39

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.744.32

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Online since:

July 2017

Authors:

Hiroshi Nemoto*, Shigeyuki Date, Shinchiro Hashimoto

Keywords:

Acceleration, AE and High-Range Water Agent, Blockage, Long-Distance Pumping, Pumpability Enhancing Admixture, Segregation Resistance, Thixotropy

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References

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DOI: 10.3151/coj.54.8_768

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