Environmental assessment of aqueous alkaline absorption of carbon dioxide and its use to produce a construction material

Gálvez‐Martos, José‐Luis; Morrison, Jennie; Jauffret, Guillaume; Elsarrag, Esam; Alhorr, Yousef; Imbabi, M.S.; Glasser, F. P.

doi:10.1016/j.resconrec.2015.12.008

Cited by 26 publications

(10 citation statements)

References 16 publications

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“…We have published a preliminary study of the GHG balance of the process (Galvez-Martos et al, 2016); in this study, it is shown that the carbon footprint of the developed product only becomes negative when the carbon footprint of other construction materials that are replaced, such as gypsum plasterboard, is taken into account.…”

Section: Next Stepsmentioning

confidence: 99%

Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products

et al. 2016

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The precipitation of magnesium hydroxy-carbonate hydrates has been suggested as a route to sequester CO2 into solids. We report the development of self-cementing compositions based on nesquehonite, MgCO3⋅3H2O, that are made from CO2-containing gas streams, the CO2 being separated from other gases by its high solubility in alkaline water, while magnesium is typically provided by waste desalination brines. Precipitation conditions are adjusted to optimize the formation of nesquehonite and the crystalline solid can readily be washed free of chloride. Products can be prepared to achieve self-cementation following two routes: (i) thermal activation of the nesquehonite then rehydration of the precursor or (ii) direct curing of a slurry of nesquehonite. The products thus obtained contain ~30 wt% CO2 and could form the basis for a new generation of lightweight, thermally insulating boards, blocks, and panels, with sufficient strength for general construction.

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Section: Next Stepsmentioning

confidence: 99%

Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products

et al. 2016

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“…Chemicals such as NaOH can be added to accelerate and enhance the process even further [7]. Most recent research developments in producing CO 2 uptake cements depart from calcium (and magnesium)-rich materials and relate to 1) accelerated curing of concrete [8][9][10], 2) carbonation of brines [11][12][13], 3) carbonation of hydrated lime [14,15] and 4) carbonation of calcium silicates [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Carbonate-bonded construction materials from alkaline residues

Nielsen¹,

Baciocchi²,

Costa³

et al. 2017

RILEM Tech Lett

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Accelerated carbonation is a rapidly developing technology that is attracting attention as it uses CO 2 as a binder to make construction materials. Originally stemming from geochemical and environmental research into CO 2 sequestration or waste remediation, accelerated carbonation has been developed into a technology that enables to transform alkaline precursors into products that meet technical requirements for use as aggregates or shaped blocks. Alkaline precursors can be manufactured from primary resources or derived from industrial residues: a.o. metallurgical slags, incineration ashes and concrete recycling residues are prone to carbonate under controlled conditions. Moist carbonation of shaped Ca-silicate rich precursors at elevated curing temperature and CO 2 concentration or pressure has delivered the most promising results so far. This letter presents an overview of current accelerated carbonation approaches to make carbonate-bonded construction materials from alkaline residues. The general carbonation mechanism is explained and two application routes are exemplified: i.e. production of lightweight aggregates and compact blocks by accelerated moist carbonation.

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“…When CO 2 is dissolved in such brine compositions, (Mg, Ca) carbonates are spontaneously formed. Contributions from Glasser et al . have recently demonstrated such an approach wherein the formation of nesquehonite results in the formation of stable cementitious formulations.…”

Section: Reviewsmentioning

confidence: 99%

Cements in the 21^st century: Challenges, perspectives, and opportunities

et al. 2017

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In a book published in 1906, Richard Meade outlined the history of portland cement up to that point1. Since then there has been great progress in portland cement-based construction materials technologies brought about by advances in the materials science of composites and the development of chemical additives (admixtures) for applications. The resulting functionalities, together with its economy and the sheer abundance of its raw materials, have elevated ordinary portland cement (OPC) concrete to the status of most used synthetic material on Earth. While the 20th century was characterized by the emergence of computer technology, computational science and engineering, and instrumental analysis, the fundamental composition of portland cement has remained surprisingly constant. And, although our understanding of ordinary portland cement (OPC) chemistry has grown tremendously, the intermediate steps in hydration and the nature of calcium silicate hydrate (C-S-H)*, the major product of OPC hydration, remain clouded in uncertainty. Nonetheless, the century also witnessed great advances in the materials technology of cement despite the uncertain understanding of its most fundamental components. Unfortunately, OPC also has a tremendous consumption-based environmental impact, and concrete made from OPC has a poor strength-to-weight ratio. If these challenges are not addressed, the dominance of OPC could wane over the next 100 years. With this in mind, this paper envisions what the 21st century holds in store for OPC in terms of the driving forces that will shape our continued use of this material. Will a new material replace OPC, and concrete as we know it today, as the preeminent infrastructure construction material?

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Environmental assessment of aqueous alkaline absorption of carbon dioxide and its use to produce a construction material

Cited by 26 publications

References 16 publications

Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products

Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products

Carbonate-bonded construction materials from alkaline residues

Cements in the 21^st century: Challenges, perspectives, and opportunities

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Environmental assessment of aqueous alkaline absorption of carbon dioxide and its use to produce a construction material

Cited by 26 publications

References 16 publications

Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products

Sequestering CO2 by Mineralization into Useful Nesquehonite-Based Products

Carbonate-bonded construction materials from alkaline residues

Cements in the 21st century: Challenges, perspectives, and opportunities

Contact Info

Product

Resources

About

Cements in the 21^st century: Challenges, perspectives, and opportunities