The influence of shrinkage reducing admixtures on plastic shrinkage
DOI:
https://doi.org/10.3989/mc.2003.v53.i271-272.291Keywords:
shrinkage reducing admixture, plastic shrinkage, early age crackingAbstract
Shrinkage reducing admixtures (SRAs) are viable alternatives for reducing plastic shrinkage cracking in concrete. The objective of the present paper is to study early age plastic shrinkage in restrained concrete elements, where three different SRAs have been used. The influence of the admixture is analyzed through the following measurements: capillary pressure, evaporation, temperature evolution, crack evolution and settlement. The tests for studying the cracking and deformation were made on two different configurations (i.e., restrained prisms with reduced cross-section and restrained panel), in a wind tunnel, with controlled wind temperature and velocity. The conclusions obtained indicate the viability of the use of this type of admixture and the usefulness of the test methods.
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