The Applications of Alkali-Activated Materials in Construction

A special issue of Construction Materials (ISSN 2673-7108).

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 9127

Special Issue Editors


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Guest Editor
Department of Chemical, Environmental and Material Engineering, Universidad de Jaén, Jaen, Spain
Interests: waste recovery; ceramics; bricks; alkali activated materials; geopolymers; life cycle assessment; construction and demolition waste; sustainability; synthesis; processing; characterization; clay-based materials

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Guest Editor
Department of Chemical, Environmental, and Materials Engineering, University of Jaen, 23700 Linares, Spain
Interests: byproduct and industrial residue valorization; ceramics; cements; alkali-activated materials; synthesis of nanomaterials
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Guest Editor
Department of Chemical, Environmental, and Materials Engineering, University of Jaen, Campus Las Lagunillas, s/n, 23071 Jaén, Spain
Interests: recovery; waste; bricks; mortars; geopolymers; concretes; composites; ceramic materials; construction materials; sustainability; synthesis; processing; characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

For the application of new alkaline activation materials as construction materials, there are different aspects that require further research and evaluation at a scientific–technological level. On the one hand, there is today a multitude of possible aluminosilicate geopolymeric precursors, many of which require a global and multidisciplinary review to evaluate their real viability of use. Likewise, the use of alkaline activators from residual materials opens up new formulation opportunities with greater economic viability for obtaining alkaline activated building materials.

The optimization of all these aspects from an environmental point of view also requires the performance of life cycle and leaching analyses that, to date, offer very dispersed information on the real environmental improvements offered by alkaline activation materials against traditional building materials.

The compilation of research works in these areas is therefore essential for future developments in standardization and good practices that facilitate an industrial and commercial implementation of these materials.

Dr. Salvador Bueno
Dr. Luis Pérez Villarejo
Dr. Dolores Eliche Quesada
Guest Editors

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Keywords

  • Alkali activated material 
  • Alkaline activator 
  • Construction material 
  • Geopolymer precursor 
  • Leaching test 
  • Life cycle assessment 
  • Mechanical properties 
  • Waste

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Published Papers (2 papers)

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Research

12 pages, 40386 KiB  
Article
Resistance of Geopolymer, Epoxy and Cement Mortar to Hydrocarbon-Based Synthetic Engine Lubricant, Hydraulic Fluid, Jet Fuel and Elevated Temperatures
by Sukanta Kumer Shill, Safat Al-Deen, Mahmud Ashraf, Estela Oliari Garcez, Mahbube Subhani and Muhammad Monowar Hossain
Constr. Mater. 2022, 2(1), 15-26; https://doi.org/10.3390/constrmater2010002 - 18 Jan 2022
Cited by 8 | Viewed by 3665
Abstract
Due to routine maintenance of aircraft on the concrete pavement at army airbases, a large part of the pavement surface is often found saturated with different hydrocarbon-based oil, fuel, and fluid. In addition, the pavement concrete is subjected to the aircraft’s exhaust temperature [...] Read more.
Due to routine maintenance of aircraft on the concrete pavement at army airbases, a large part of the pavement surface is often found saturated with different hydrocarbon-based oil, fuel, and fluid. In addition, the pavement concrete is subjected to the aircraft’s exhaust temperature during operation. This study examined the resistance ability of 3 different cementitious materials: (i) epoxy, (ii) fly ash (FA) based geopolymer with various alkali to fly ash (AL/FA) ratios and (iii) Portland cement (PC) mortar under a simulated airfield circumstance. The mortar specimens were repetitively exposed to a mixture of synthetic engine oil, hydraulic fluids, jet fuel and elevated temperatures (175 °C) for 5 months simultaneously. During the exposures, geopolymer and PC mortar both suffered saponification. The degree of saponification of geopolymer samples is found to be highly reliant on the AL/FA ratios. On the contrary, the epoxy mortar was found to be resistant to saponification. It was also found that the PC mortar developed numerous thermal cracks but epoxy and geopolymer did not experience any visual thermal cracks under the same conditions. Full article
(This article belongs to the Special Issue The Applications of Alkali-Activated Materials in Construction)
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14 pages, 3690 KiB  
Article
The Effect of Biochar on the Properties of Alkali-Activated Slag Pastes
by Joshua Prabahar, Babak Vafaei, Elvis Baffoe and Ali Ghahremaninezhad
Constr. Mater. 2022, 2(1), 1-14; https://doi.org/10.3390/constrmater2010001 - 23 Dec 2021
Cited by 20 | Viewed by 3967
Abstract
This paper examines the influence of biochar on the properties of alkali-activated slag pastes using two activator solutions, namely NaOH and Na2CO3. The biochar demonstrated different absorption kinetics in the mixture of slag and the two activator solutions. The [...] Read more.
This paper examines the influence of biochar on the properties of alkali-activated slag pastes using two activator solutions, namely NaOH and Na2CO3. The biochar demonstrated different absorption kinetics in the mixture of slag and the two activator solutions. The pastes with biochar showed a delay in the heat flow peak, compared to the pastes without biochar, but the cumulative heat release in these pastes at later hours was increased, compared to the pastes without biochar. It was found that the use of biochar reduced autogenous shrinkage in the pastes and the reduction in autogenous shrinkage was more pronounced in the alkali-activated slag with NaOH, compared to Na2CO3. The void structure of the pastes was investigated using x-ray micro-computed tomography. It was found that refined pore structure due to reduced effective solution/slag in the pastes with biochar was able to compensate for the decreasing effect of biochar voids on compressive strength. The electrical resistivity was shown to be lower in the pastes with biochar. Full article
(This article belongs to the Special Issue The Applications of Alkali-Activated Materials in Construction)
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