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ABSTRACT
Certain varieties of concrete are not produced with Portland cement (OPC) but by activating metallurgical slag, coal fly ash, coal bottom ash, beta kaolin, and other silico-aluminates with sodium, potassium hydroxide or silicate. More recently certain concretes have been obtained by activating limestone and silica minerals using sodium hydroxide. The concrete obtained in this fashion shows encouraging performance in terms of its fast setting quality, protection of steel reinforcing bars against extreme weather conditions, fire and acid resistance. The subject has resulted in the request for dozens of patents which can be consulted on the internet.
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Read the articleAUTHOR
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Philippe PICHAT: Engineer - Doctor of Science - National Expert approved by the French Supreme Court 2000-2007 - Technical Manager St ADT - Former member of the CSRT Conseil supérieur de la recherche et de la technologie (Higher Council for Research and Technology)
INTRODUCTION
Sector: Building – Construction – Civil engineering
Degree of technology diffusion: Emergence | Growth | Maturity
Technologies involved: Concrete – Chemistry
Applications: Construction, Civil Engineering
Main French players :
Geopolymer Institute https://www.geopolymer.org/fr/
LCPC Paris
University of Cergy-Pontoise. Civil Engineering Department. Professor Jean-Louis Gallias. IFP
ADT Philippe Pichat
Other players worldwide :
Department of chemical and biomolecular Engineering, The University of Melbourne, Parkville, Australia
Center for Sustainable Resource Processing, Perth (Australia)
Instituto de Ciencas de la Construccion, Eduardo Torroya (CS IC), Madrid – (Spain)
Department of Materials Science, Polytechnic University of Madrid, (Spain)
Contact: Dr Philippe Pichat, [email protected]
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KEYWORDS
Metallurgical slag | coal fly ash | ,coal bottom ash | bétakaolin | sodium hydroxyde | sodium silicate | Building Trade | Construction Industrie |
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Unit operations. Chemical reaction engineering
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Hydroxide and/or alkali silicate decarbonated concretes
Context
Bibliography
Events
Science, Applications and Sustainability Proceedings
RILEM Proceedings
Patents
DAVIDOVITS (J.). – US patent 4 349 386 mineral polymers...
DAVIDOVITS (J.). – US patent 4 472 199 synthetic mineral polymers.
DAVIDOVITS (J.). – US patent 4 509 985 early hith strength mineral polymer...
DAVIDOVITS (J.). – US patent 5 342 595 process for obtaining a geopolymeric alumino silicate...
DAVIDOVITS (J.). – US patent 5...
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