Eco-efficient alkaline activated binders for manufacturing blocks and pedestrian pavers with low carbon footprint: Mechanical properties and LCA assessment

Mejía-Arcila, Johanna M.; Valencia-Saavedra, William; Gutiérrez, Ruby Mejía de

doi:10.3989/mc.2020.17419

Cited by 12 publications

(4 citation statements)

References 30 publications

(34 reference statements)

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“…The final yield will depend on the thermodynamic driving force for the desired reaction to happen, and on the dissolution kinetics in alkaline media, which must be fast enough to take place in technologically feasible times. More specific information on the different types of precursors can be found in the references ( Ben Haha et al, 2011b ; Palomo et al, 2014 ; Abdullah et al, 2020 ; Khalifa et al, 2020 ; Mejía-Arcila et al, 2020 ; Rivera et al, 2020 ; Cheah et al, 2021 ).…”

Section: Alkali Activated Binders (Aabs)*mentioning

confidence: 99%

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

et al. 2021

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This review undertakes rigorous analysis of much of the copious literature available to the scientific community on the use of alkali-activated binders (AABs) in construction. The authors’ main intention is to categorically refute arguments of that part of the scientific community underestimating or even dismissing the actual potential of AABs as alternatives to Portland cement (PC). The main premise invoked in support of those arguments is a presumed lack of material resources for precursors that would make AAB industrial-scale production unfeasible anywhere on the planet (a substantial number of scientific papers show that the raw materials required for AAB manufacture are in abundance worldwide). The review also analyses the role of alkaline activators in the chemistry of AABs; it is important to clarify and highlight that alkaline activators are not, by any means, confined to the two synthetic products (caustic soda and waterglass) mostly employed by researchers; other sustainable and efficient products are widely available. Finally, the review deals with the versatility of AAB production processes. The technologies required for the large scale manufacturing of AABs are mostly already in place in PC factories; actually no huge investment is required to transform a PC plant in a AAB factory; and quality and compositional uniformity of Alkaline Cements (binders produced through an industrial process) would be guaranteed. The last conclusions extracted from this review-paper are related with: i) the low carbon footprint of one-part AABs and ii) the urgent need of exploring standardization formulas allowing the commercial development of (sustainable) binders different from PC.

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Section: Alkali Activated Binders (Aabs)*mentioning

confidence: 99%

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

et al. 2021

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“…A review of the state of the art of LCA for binders and asphalt mixtures has been previously made (31)(32)(33)(34)(35)(36), however, very few had evaluated different pavement rehabilitation strategies or the benefits of using MW-assisted healing technology. In any case, the are promising results according to the research made.…”

Section: Introductionmentioning

confidence: 99%

Environmental benefits of microwave-assisted self-healing technology for pavements - A Life Cycle Assessment comparative study

Rodríguez-Alloza,

Gulisano,

Garraín

2024

Mater. constr.

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The maintenance and rehabilitation of roads is becoming a key challenge in the pavement industry to decrease the consumption of natural resources. Microwave-assisted self-healing technology extends the life-service of asphalt pavements for roads reducing the need for fossil fuels over its lifespan and saving the use of natural resources. This technique takes advantage of the thermoplastic and dielectric properties of asphalt mixtures that allows cracks to be closed, hence, heal and restore the asphalt mixtures mechanical behaviour without implementing more invasive traditional maintenance operations like milling and replacing the pavement. A Life-Cycle Assessment was carried out to determine the potential environmental benefits of using this technology quantifying its potential environmental impacts. Different scenarios in which the heating energy and the addition of slag varies has been evaluated and compared with a conventional road. Results shows that this technology could decrease a significant number of environmental impacts over the lifecycle.

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“…On the other hand, building materials have heterogeneous compositions and microstructures; therefore, they tolerate compositional variations in waste from different campaigns. In recent decades, several studies have focused on the reuse of waste as a raw material in the manufacture of different construction materials, such as various types of clinker [ 5 ], cement [ 6 , 7 , 8 ], mortars [ 9 ], concretes [ 10 , 11 , 12 , 13 ], geopolymers [ 14 , 15 ], clay bricks [ 16 , 17 , 18 , 19 , 20 ], ceramic tiles [ 21 , 22 ], and roof tiles [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Lightweight Mortars Using Sustainable Low-Density Glass Aggregates from Secondary Raw Materials

Romero,

Padilla,

García Calvo

et al. 2023

Materials

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In this study, different lightweight expanded glass aggregates (LEGAs) were produced from glass cullet and various carbonated wastes, through a thermal impact process. The effects of LEGA microstructure and morphology on both the adherence to the cement paste and the mechanical properties of mortars after 28 days of curing were studied. The properties of lightweight mortars made of either LEGAs or expanded clay aggregates were compared. The results demonstrated the feasibility of using LEGAs to produce glass lightweight aggregate mortar, with flexural and compressive strength values ranging from 5.5 to 8.2 MPa and from 28.1 to 47.6 MPa, respectively. The differences in mechanical properties were explained according to the microstructures of the fracture surfaces. Thus, arlite-type ceramic aggregates presented surface porosities that allowed mortar intrusion and the formation of an interconnected interface; although the surfaces of the vitreous aggregates were free from porosity due to their vitreous nature, the mortars obtained from different wastes presented compressive and flexural strengths in the range of lightweight mortars.

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Eco-efficient alkaline activated binders for manufacturing blocks and pedestrian pavers with low carbon footprint: Mechanical properties and LCA assessment

Cited by 12 publications

References 30 publications

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

Environmental benefits of microwave-assisted self-healing technology for pavements - A Life Cycle Assessment comparative study

Development of Lightweight Mortars Using Sustainable Low-Density Glass Aggregates from Secondary Raw Materials

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