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Mitigating Autogeneous Shrinkage by Internal Curing

Published

Author(s)

M R. Geiker, O M. Jensen

Abstract

The use of internal curing is seen to be a highly effective means of mitigating autogenous shrinkage in cement mortars (w/s = 0.35, 8 % silica fume). Two different sources of internal water supply are compared: 1) replacement of a portion of the sand by saturated low-density fine aggregate and 2) the addition of superabsorbent polymer particles (SAP). At equal water addition rates, the SAP system is seen to be more efficient in reducing autogenous shrinkage at later ages, most likely due to a more homogeneous distribution of the extra curing water within the three-dimensional mortar microstructure. A comparison of the water distribution in the different systems, based on computer modeling and direct observation of two-dimensional cross sections, is given.
Citation
American Concrete Institute (ACI) Materials Journal

Keywords

autogenous deformation, building technology, cement hydration, internal curing, lightweight aggregates, superabsorbent polymers

Citation

Geiker, M. and Jensen, O. (2002), Mitigating Autogeneous Shrinkage by Internal Curing, American Concrete Institute (ACI) Materials Journal, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860426 (Accessed June 15, 2024)

Issues

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Created October 1, 2002, Updated February 19, 2017