Alkali-activated binary concrete based on a natural pozzolan: physical, mechanical and microstructural characterization

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 30 Sep 2019Publisher:Editorial CSICJournal:Materiales de Construcción, volume 69, page e191 (issn: 0465-2746, eissn: 1988-3226,

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Authors: R. Robayo-Salazar; R. Mejía de Gutiérrez; F. Puertas;

doi: 10.3989/mc.2019.06618 , 10.60692/549ee-3tq90 , 10.60692/29g6j-t0t17

handle: 10261/210577

Alkali-activated binary concrete based on a natural pozzolan: physical, mechanical and microstructural characterization

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Abstract

This article presents the physical, mechanical and microstructural characterization of an alkali-activated binary concrete (AABC) based on a natural pozzolan (NP) of volcanic origin (70%) and granulated blast furnace slag (GBFS) (30%) cured at room temperature (25°C). A solution based on the combination of NaOH and waterglass (Na2SiO3·5H2O) was employed as an alkaline activator. The concrete design was obtained using a modified version of the “absolute volume” method (ACI 211.1). The performance of the AABC was similar and even superior to that of the reference concrete (OPC); e.g., it exhibited a compressive strength of up to 43.4 MPa at 360 days. These results demonstrate that the NP has potential for use in the industrial-scale production of these types of materials in the foreseeable future.

Related Organizations

Universidad del Valle
Costa Rica
Instituto de Ciencias de La Construcción Eduardo Torroja
Spain
Spanish National Research Council
Spain
University of Valle
Colombia

Keywords

Composite material, Portland cement, Alkali-activated concrete, Materials Science, Utilization of Waste Materials in Construction and Ceramics, granulated blast furnace slag, Cement, Organic chemistry, Compressive strength, Binary concrete, Pozzolan, Alkali metal, Engineering, Natural volcanic pozzolan, Materials Chemistry, Nanotechnology, Puzolana natural volcánica, Geopolymer and Alternative Cementitious Materials, alkali-activated concrete, Materials of engineering and construction. Mechanics of materials, Microstructure, Mechanical and physical properties, Hormigón binario, Civil and Structural Engineering, Granulated blast furnace slag, Escoria granulada de horno alto, Magnesium-Based Cements and Nanomaterials, FOS: Nanotechnology, mechanical and physical properties, Building and Construction, Mineralogy, Hormigón activado alcalinamente, Materials science, Ground granulated blast-furnace slag, Chemistry, Physical Sciences, TA401-492, Propiedades físicas y mecánicas, natural volcanic pozzolan, Characterization (materials science), binary concrete, Alkali-Activated Materials

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