Alkali-activated building materials made with recycled construction and demolition wastes

[Display omitted] •Alkali-activated cements (AACs) based on construction wastes (CDW) are obtained.•High compressive strengths of up to 102MPa were obtained for AACs.•Blocks, pavers, roof tiles and tiles (building materials) were made from AACs.•The recycled of CDW through “Alkali activation technol...

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Bibliographic Details
Published in:Construction & building materials 2017-09, Vol.149, p.130-138
Main Authors: Robayo-Salazar, Rafael Andrés, Rivera, Jhonathan Fernando, Mejía de Gutiérrez, Ruby
Format: Article
Language:English
Subjects:
Alkali-activated cements
Bricks
Cements (Building materials)
Concrete waste
Concretes
Construction and demolition wastes
Geopolymers
Glass
Glass waste
Properties
Recycling materials
Red clay brick waste
Waste management
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Summary:[Display omitted] •Alkali-activated cements (AACs) based on construction wastes (CDW) are obtained.•High compressive strengths of up to 102MPa were obtained for AACs.•Blocks, pavers, roof tiles and tiles (building materials) were made from AACs.•The recycled of CDW through “Alkali activation technology” were demonstrate. The goal of this study was to test the viability of using red clay brick waste (RCBW), concrete waste (CW) and glass waste (GW) to produce alkali-activated cements (AACs) that can be used to fabricate blocks, pavers, roof tiles and tiles. The alkaline activators used were solutions of either NaOH or NaOH and waterglass. Ordinary Portland cement (OPC) was mixed with RCBW and CW in proportions of up to 30% to create hybrid cements. The AACs obtained with the RCBW, the CW and the GW exhibited maximum compressive strengths (28days) of 102, 33 and 57MPa, respectively.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2017.05.122