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Aponte, Diego

García, Pablo

Hidalgo Torrano, Pilar

Hidalgo, Elena

Javier Prego Martínez, Francisco

Maldonado-Alameda, Alex

Martínez García, Carolina

Miguéns Blanco, M. Alberto

Pedroso, Félix

Russo, Alessandro

English

Engineering Conferences International

KEOPS PROJECT: RESEARCH ON SUSTAINABLE HIGH-ADDED VALUE ALKALI-ACTIVATED CONCRETES BASED ON INDUSTRIAL WASTE  Carolina Martínez García, CETIM Technological Centre cgarcia@cetim.es Alex Maldonado-Alameda, CETIM Félix Pedroso, ADEC GLOBAL  Alessandro Russo, CROMOGENIA UNITS SA Pilar Hidalgo Torrano, CEMENTOS CRUZ  Francisco Javier Prego Martínez, EXTRACO SA  Pablo García, PREFHORVISA M. Alberto Miguéns Blanco, CETIM Diego Aponte, UPC Elena Hidalgo, CETIM   Key Words: Waste management, Electric arc furnace slag, Alkali activated concrete, Low-carbon concrete.  The R+D+i project “KEOPS”, which is titled “Research into integral sustainable alkali-activated and high added value solutions from construction and industrial waste”, develops novel free OPC constructive solutions. KEOPS is presented under the synergistic interaction of 5 companies (CROMOGENIA, CEMENTOS CRUZ, ADEC GLOBAL, EXTRACO, and PREFHORVISA), supported by two technological centres (CETIM and Department of Civil and Environmental Engineering, UPC-BarcelonaTech). Electric arc furnace slags (EAFS) and construction and demolition waste (CDW) were screened and conditioned for its use as alkali-activated precursors or fine and coarse aggregates in different constructive purposes such as additive manufacturing, fast setting and low rebound solutions (shotcrete, plain concrete, etc.), and easy demoulding precast concrete. In addition, ad-hoc molecular synthesis of polycarboxylate grinding aids and superplasticizer were performed to enhance the alkali-activated materials (AAMs) final properties depending on the constructive solution. The most promising results were obtained in the formulations based on EAFS and steel aggregates using sodium silicate as an alkaline activator solution, with which it has been possible to carry out different pilot scales (3D printing pieces, sprayed concrete over slope, and precast concrete hollow blocks).  Figure 1 KEOPS project scheme PASTES, MORTARS AND CONCRETE DOSAGESSCALE-UP AND DEMOSITESElectric arc furnaceslags (EAFS)Construction and demolition waste (CDW)Screening, selection and grinding of CDWs and EAFS (black and White)Precursors and aggregatesCDWs and EAFSAditivesAlkaline activatorsolutionGrindingAidsPrecast productsMortarsPrecast concrete blockSprayed concrete over slope3D printingconcrete pieces

KEOPS project: Research on sustainable high-added value alkali-activated concretes based on industrial waste

https://dc.engconfintl.org/cgi/viewcontent.cgi?filename=0&article=1058&context=geopolymers2023&type=additional

KEOPS project: Research on sustainable high-added value alkali-activated concretes based on industrial waste

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Engineering Conferences International