[en] A linear relationship was found between the mean size of four granular classes
(0/0.63, 0.63/1.25, 1.25/2.5, 2.5/5 mm) of different laboratory-made fine recycled
concrete aggregates (FRCA) and their hardened cement paste content (CPC).
A method based on salicylic acid dissolution was specifically developed for the
measurement of CPC. Results showed that bound water and density of FRCA were
strongly correlated with their CPC. Identically, the water absorption coefficient also
followed a linear trend as a function of the CPC but only for the three coarser
granular classes. Indeed, the water absorption coefficient of the finer fraction of
FRCA (0/0.63 mm) cannot be correctly measured using European standard method
EN 1097-6 or method no. 78 of IFSTTAR; but it can be obtained by extrapolation
from the previous linear trend. As a consequence, the accurate total water absorption
of FRCA (fraction 0/5 mm) can be estimated.
Disciplines :
Civil engineering
Author, co-author :
Zhao, Zengfeng ; Université de Liège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Remond, Sébastien; Ecole des Mines de Douai > Civil and Environmental Engineering Department
Damidot, Denis; Ecole des Mines de Douai > Civil and Environmental Engineering Department
Xu, Weiya; Hohai University > Geotechnical Research Institute
Language :
English
Title :
Influence of hardened cement paste content on the water absorption of fine recycled concrete aggregates
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