Next Article in Journal
SbSI Composites Based on Epoxy Resin and Cellulose for Energy Harvesting and Sensors—The Influence of SBSI Nanowires Conglomeration on Piezoelectric Properties
Next Article in Special Issue
Influence of Firing Temperature on the Physical, Thermal and Microstructural Properties of Kankara Kaolin Clay: A Preliminary Investigation
Previous Article in Journal
Corrosion-Fatigue Failure of Gas-Turbine Blades in an Oil and Gas Production Plant
Previous Article in Special Issue
Development of Photocatalytic Coatings by Thermal Hydrolysis of TiCl4 on Ceramic Roofing Tiles Made from Ferroalumina and Evaluation of De-Pollution Properties

Effect of Olive-Pine Bottom Ash on Properties of Geopolymers Based on Metakaolin

Department of Chemical, Environmental and Materials Engineering Higher Polytechnic School of Jaén, University of Jaen, Campus Las Lagunillas s/n, 23071 Jaén, Spain
Department of Chemical, Environmental, and Materials Engineering, Higher Polytechnic School of Linares, University of Jaen, Campus Científico-Tecnológico, Cinturón Sur s/n, 23700 Linares (Jaén), Spain
Center for Advanced Studies in Energy and Environment (CEAEMA) Universidad de Jaén, Campus Las Lagunillas, s/n, 23071 Jaén, Spain
Author to whom correspondence should be addressed.
Materials 2020, 13(4), 901;
Received: 15 December 2019 / Revised: 12 February 2020 / Accepted: 14 February 2020 / Published: 18 February 2020
(This article belongs to the Special Issue Recent Progress in Sustainable Clay Ceramics)
In this research, the feasibility of using bottom ashes generated by the combustion of biomass (olive pruning and pine pruning) as a source of aluminosilicates (OPBA) has been studied, replacing the metakaolin precursor (MK) in different proportions (0, 25, 50, 75, and 100 wt.% substitution) for the synthesis of geopolymers. As alkaline activator an 8 M NaOH solution and a Na2SiO3 have been used. The geopolymers were cured 24 h in a climatic chamber at 60 °C in a water-saturated atmosphere, subsequently demoulded and cured at room temperature for 28 days. The results indicated that the incorporation of OPBA waste, which have 19.7 wt.% of Ca, modifies the characteristics of the products formed after alkaline activation. In general terms, the incorporation of increasing amounts of calcium-rich ashes results in geopolymers with higher bulk density. The compressive strength increases with the addition of up to 50 wt.% of OPBA with respect to the control geopolymers, contributing the composition of the residue to the acquisition of better mechanical behavior. The results indicate the potential use of these OPBA waste as raw material to produce unconventional cements with 28-day curing strengths greater than 10 MPa, and thermal conductivities less than 0.35 W/mK. View Full-Text
Keywords: geopolymers; metakaolin; biomass bottom ash; mechanical properties geopolymers; metakaolin; biomass bottom ash; mechanical properties
Show Figures

Figure 1

MDPI and ACS Style

Bonet-Martínez, E.; García-Cobo, P.; Pérez-Villarejo, L.; Castro, E.; Eliche-Quesada, D. Effect of Olive-Pine Bottom Ash on Properties of Geopolymers Based on Metakaolin. Materials 2020, 13, 901.

AMA Style

Bonet-Martínez E, García-Cobo P, Pérez-Villarejo L, Castro E, Eliche-Quesada D. Effect of Olive-Pine Bottom Ash on Properties of Geopolymers Based on Metakaolin. Materials. 2020; 13(4):901.

Chicago/Turabian Style

Bonet-Martínez, Eduardo, Pedro García-Cobo, Luis Pérez-Villarejo, Eulogio Castro, and Dolores Eliche-Quesada. 2020. "Effect of Olive-Pine Bottom Ash on Properties of Geopolymers Based on Metakaolin" Materials 13, no. 4: 901.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop