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Mesure de l'absorption d'eau des additions minérales des bétons par évaporométrie



Title: Mesure de l'absorption d'eau des additions minérales des bétons par évaporométrie
Author(s): J.-M. Mechling, A. Lecomte, K. Merriaux
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 36
Issue: 255
Issue date: 2003-01-01
Publication year: 2003
Pages: 32 - 39
Total Pages: 8
Nb references: 12
Language: French


Abstract: A simple method is presented to measure the absorption of the mineral admixtures used in hydraulic concretes.
Usual techniques are often ill-suited to these fine products which,when they are porous,mobilize a non-negligible part of mixing water.
The proposed procedure consists in recording the evaporation rate of the water that impregnates a granular bed slightly immersed in a horizontal tank, itself suspended on a balance,in a drying oven regulated at a moderate temperature.
The change in the rate of evaporation that appears between the external and internal water in the grains permits to mark the water critical content, which corresponds to the desired absorption.
The technique has been validated on different sands,by comparison with the absorption measured according to the French norm that is assigned to them (P 18-555).
It has then been applied to the mineral admixtures often incorporated in concretes, and to the industrial wastes that can be recycled in these materials.


Online publication: 2002-11-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13849


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