Eco-Efficient Hybrid Cements: Pozzolanic, Mechanical and Abrasion Properties

One of the most polluting industries is the cement industry and, for this reason, alternative lines of research recommend the use of substitute materials for traditional Portland cement. This study proposes the use of industrial (slag and fly ash) and ceramic wastes for the total or partial replacem...

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Bibliographic Details
Published in:Applied sciences 2020-12, Vol.10 (24), p.8986
Main Authors: Shagñay, Segundo, Ramón, Leticia, Fernández-Álvarez, María, Bautista, Asunción, Velasco, Francisco, Torres-Carrasco, Manuel
Format: Article
Language:English
Subjects:
Abrasion
abrasion behavior
alkali-activated materials
Cement
Ceramics industry
Competitive materials
Durability
Fly ash
hybrid materials
Hydration
Industrial plant emissions
Industrial wastes
Manufacturing
Mechanical properties
Porcelain
Porosity
Porous materials
Portland cement
Portland cements
Slag
Substitutes
Wastes
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Summary:One of the most polluting industries is the cement industry and, for this reason, alternative lines of research recommend the use of substitute materials for traditional Portland cement. This study proposes the use of industrial (slag and fly ash) and ceramic wastes for the total or partial replacement of Portland cement in the manufacturing of both alkaline-activated and hybrid cements. To carry out this study and evaluate the behavior of the proposed materials, different mortars were manufactured: Portland cement (CEM I), two alkaline-activated slag systems and six hybrid systems, with an 80–20% waste-to-Portland-cement ratio for all the proposed wastes. An assessment of the pozzolanic activity was carried out for the different materials. The behavior of all the systems regarding mechanical resistance and durability to abrasion was studied. All the proposed materials, especially those with ceramic wastes, showed pozzolanic activity and suitable characteristics for use in the manufacturing of alternative cements. The mortar made of slag activated with waterglass presented the highest mechanical strength and lowest porosity, but the hybrid materials presented competitive results. After being subjected to the Böhme abrasion test, their effectiveness as substitutes for Portland cement is reiterated, some of them improving their durability to wear.
ISSN:2076-3417
2076-3417
DOI:10.3390/app10248986