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COMBINED EFFECTS OF INTERNAL CURING, SLAG, AND SILICA FUME ON DRYING SHRINKAGE OF CONCRETE
Pendergrass, Benjamin Darwin, David Khajehdehi, Rouzbeh Feng, Muzai
Pendergrass, Benjamin
Darwin, David
Khajehdehi, Rouzbeh
Feng, Muzai
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Abstract
This study evaluated drying shrinkage of concrete mixtures containing different replacement levels
of total aggregate with pre-wetted lightweight aggregate (0, 8, and 10% by volume), replacements
of cement with Grade 100 slag cement (0 and 30% by volume), and replacements of cement with
silica fume (0, 3, and 6% by volume). The internal curing water provided by pre-wetted LWA
ranged from 5.7 to 7.5% by weight (mass) of cementitious material. The mixtures had watercementitious
material ratios of 0.44 or 0.45 and paste contents between 23.36 and 24.06% by
volume. The results show that internal curing provided by pre-wetted LWA reduces both earlyage
(0 to 30 days) and long-term (30 to 365 days) shrinkage. Shrinkage is reduced further as slag
is added in conjunction with LWA. An additional reduction in shrinkage is observed as silica fume
is added in conjunction with the LWA and slag.
Description
Date
2017-08-01
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Publisher
University of Kansas Center for Research, Inc.
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Keywords
Concrete, Drying shrinkage, Internal curing, Silica fume, Slag cement, Pre-wetted lightweight aggregate
Citation
Pendergrass, B., Darwin, D., Khajehdehi, R., and Feng, M., “Combined Effects of Internal Curing, Slag, and Silica Fume on Drying Shrinkage of Concrete,” SL Report 17-1, University of Kansas Center for Research, Inc., Lawrence, KS, August 2017, 41 pp.