Title:
Effect of Admixtures on Pumpability for High-Strength Concrete
Author(s):
Jae Hong Jeong, Kyong Pil Jang, Chan Kyu Park, Seung Hoon Lee, and Seung Hee Kwon
Publication:
Materials Journal
Volume:
113
Issue:
3
Appears on pages(s):
323-333
Keywords:
admixtures; high-strength concrete; lubricating layer; pumpability; rheological properties
DOI:
10.14359/51688644
Date:
5/1/2016
Abstract:
In this study, the effects of mineral and chemical admixtures on
pumpability of high-strength concrete were investigated through measuring rheological properties of concrete and the lubricating layer. A total of 32 concrete mixtures were manufactured and tested according to different types and dosages of silica fume, zirconia silica fume, fly ash, and high-range water-reducing admixtures (HRWRAs). From the experiments, it was found that zirconia silica fume is very effective in enhancing pumpability, and the increase of HRWRA dosage leads to the decrease of the viscosity of the lubricating
layer and the increase of pumpability.