Reference : Use of contaminated recycled aggregates for concrete design: properties and durability
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/117751
Use of contaminated recycled aggregates for concrete design: properties and durability
English
Courard, Luc mailto [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil >]
Michel, Frédéric mailto [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil >]
Debieb, Farid mailto [Université de Médéa, Algérie > > > >]
23-May-2012
Doseganje posebnih lastnosti betonov z uporabo odpadlih materialov
Zajc, Andrej mailto
CIP
21-29
No
Yes
International
978 961 91378 8 8
Ljubljana
Slovenia
19.Slovenski Kolokvij o Bentonih
23 mai 2012
J. Sustercic (IRMA)
Ljubljana
Slovénie
[en] rigid pavement ; concrete ; recycling ; compatibility ; compaction ; contamination ; durability ; chloride ; sulphates ; sea water ; roller compacted concrete
[en] Construction waste management is a quite important economic and environmental deal for our societies. More than 2 million tons demolition and construction wastes are annually produced only in Wallonia, Southern Region of Belgium; recycling has clearly to be promoted. Roller Compacted Concrete (RCC) is a special dry concrete made of aggregates, water and low quantity of cement, laid down and compacted like a soil, for the construction of massive structures like dams or large horizontal surfaces like road foundations. Replacement of natural aggregates by concrete road recycled aggregates in the mix design of concrete is a solution to decrease nature depletion. Natural concrete slabs were cured in water, sea water, chloride solutions or sulphate solutions and then crushed to obtain virgin and contaminated (polluted) recycled aggregates. The aim of this research is the total replacement (100% coarse and fine) of natural aggregates (NA) by recycled concrete aggregates (RA) in the composition of a roller compacted concrete. The natural and recycled aggregates are characterised and compared. The mechanical properties and durability performances of concrete with contaminated RA are analysed.
The experimental results showed that the polluted RA are much richer in chlorides than in sulphates and are leached if they are soaked in water. Significant differences were observed between the properties of original and new concrete and the results demonstrated the need of taking these contaminations into account.
Cooperation agreement between the Federation Wallonia-Brussels (Belgium) and the Republic of Slovenia/Belgian Technical Cooperation Agency
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/117751

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