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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Superplasticized Shrinkage-Compensating Concrete
Author(s): M. Collepardi, M. Corradi,
and M. Valente
Publication: Special Publication
Appears on pages(s): 159-172
Keywords: coarse aggreg ates
shrinkage; expand ing age nts;
plasticizers; portland cemen
strength; water-cement ratio
; compressive strength; drying
expansion; naphthalene compounds;
ts; shrinkage-compensating concretes;
Abstract:Compressive strength and restrained expansion tests were carried out on concretes containing naphthalene sulphonic formaldehyde type superplasticizer and an expansive agent based on processed lime. At constant expansive agent content, the higher the early strength (1 day) the higher was the restrained expansion. Therefore, if the superplasticizer is used to increase the early strength by reducing the water/cement ratio, it is possible to reduce the content of the expansive agent to obtain the same de-gree of expansion. On the other hand, if the superplasticizer is used to reduce both water and cement, and therefore the drying shrinkage, less expansive agent would be required for shrinkage compensation purposes. The results of the present work indicate that the combination of a superplasticizer and an expansive agent may be more advantageous than the use of expansive agent alone.
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