Impact of the initial moisture level and ...
Document type :
Article dans une revue scientifique: Article original
Title :
Impact of the initial moisture level and pre-wetting history of recycled concrete aggregates on their water absorption
Author(s) :
Khoury, Eliane [Auteur]
Granulats et Procédés d'Elaboration des Matériaux [IFSTTAR/MAST/GPEM]
Cazacliu, Bogdan [Auteur]
Granulats et Procédés d'Elaboration des Matériaux [IFSTTAR/MAST/GPEM]
Rémond, Sébastien [Auteur]
Laboratoire Génie Civil et Géo-Environnement [Béthune] [LGCgE]
Granulats et Procédés d'Elaboration des Matériaux [IFSTTAR/MAST/GPEM]
Cazacliu, Bogdan [Auteur]
Granulats et Procédés d'Elaboration des Matériaux [IFSTTAR/MAST/GPEM]
Rémond, Sébastien [Auteur]
Laboratoire Génie Civil et Géo-Environnement [Béthune] [LGCgE]
Journal title :
Materials and structures
Pages :
16p
Publisher :
Springer Verlag
Publication date :
2017-01-01
ISSN :
1359-5997
Keyword(s) :
MATERIAU
GRANULAT
GRANULAT RECYCLE
BETON
ABSORPTION
GRANULAT
GRANULAT RECYCLE
BETON
ABSORPTION
English keyword(s) :
RECYCLED CONCRETE AGGREGATES
WATER ABSORPTION
PRE-WETTING PARTIAL VACUUM
PREHUMIDIFICATION
VIDE PARTIEL
WATER ABSORPTION
PRE-WETTING PARTIAL VACUUM
PREHUMIDIFICATION
VIDE PARTIEL
HAL domain(s) :
Sciences de l'ingénieur [physics]/Matériaux
French abstract :
Initial moisture and pre-wetting method influence on the water absorption of recycled concrete aggregates (RCA) have been studied experimentally. For this purpose, RCA were pre-wetted by three methods: soaking under partial ...
Show more >Initial moisture and pre-wetting method influence on the water absorption of recycled concrete aggregates (RCA) have been studied experimentally. For this purpose, RCA were pre-wetted by three methods: soaking under partial vacuum (simulating long term wetting), soaking under atmospheric pressure, and spraying (simulating short term wetting). The results show that the same initial amount of water in two samples of RCA do not lead to the same total amount of water absorbed by RCA during 5-120 min. The latter depends on the way they have been pre-wetted (either long term or short term). It is suggested that this phenomenon is related to the accessibility filled pores in the different pre-wetting methods. So, the pre-wetting history of RCA could change the amount of total water absorbed by the RCA up to 1%. When mixing and casting concrete are produced with RCA, the corresponding error in the determination of the effective water should have adverse effects on the fresh and hardened concrete characteristics. In this study real applications on mixtures of recycled concrete have been carried out, where the influence of initial moisture content and pre-wetting history of RCA on fresh recycled concrete properties (slump) have been investigated.Show less >
Show more >Initial moisture and pre-wetting method influence on the water absorption of recycled concrete aggregates (RCA) have been studied experimentally. For this purpose, RCA were pre-wetted by three methods: soaking under partial vacuum (simulating long term wetting), soaking under atmospheric pressure, and spraying (simulating short term wetting). The results show that the same initial amount of water in two samples of RCA do not lead to the same total amount of water absorbed by RCA during 5-120 min. The latter depends on the way they have been pre-wetted (either long term or short term). It is suggested that this phenomenon is related to the accessibility filled pores in the different pre-wetting methods. So, the pre-wetting history of RCA could change the amount of total water absorbed by the RCA up to 1%. When mixing and casting concrete are produced with RCA, the corresponding error in the determination of the effective water should have adverse effects on the fresh and hardened concrete characteristics. In this study real applications on mixtures of recycled concrete have been carried out, where the influence of initial moisture content and pre-wetting history of RCA on fresh recycled concrete properties (slump) have been investigated.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Non spécifiée
Popular science :
Non
Source :