Measuring the water capacity and transfer properties of fresh mortar

The water transport properties of fresh mortar are determined using three experimental techniques which are common in soil science but new in this field of application: permeameter tests, suction tests and pressure plate tests. A description of the phase relations of mortars during drainage (moistur...

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Bibliographic Details
Published in:Cement and concrete research 2010-12, Vol.40 (12), p.1650-1655
Main Authors: Hendrickx, R., Roels, S., Van Balen, K.
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Cements
Concretes. Mortars. Grouts
Drainage
Exact sciences and technology
Fresh mortar
Materials
Mathematical analysis
Moisture content
Mortars
Particle size distribution
Permeability
Permeameters
Properties and performance of fresh concrete
Water retention
Workability
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Summary:The water transport properties of fresh mortar are determined using three experimental techniques which are common in soil science but new in this field of application: permeameter tests, suction tests and pressure plate tests. A description of the phase relations of mortars during drainage (moisture-loss) leads to an expression of the water retention curve as a function of the water content using Van Genuchten's equation. The permeability curve is then derived from a single point measurement and a relation between permeability and water retention. Important differences between lime and cement mortars are expressed in terms of their residual water content and the slope of the water retention curve. These differences are found to be intrinsically related to the particle size distribution of the binder used.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2010.08.002