Ionic interaction and liquid absorption by wood in lignocellulose inorganic mineral binder composites

G.C.H. Doudart de la Grée, V. Caprai, J.E.G. van Dam, H. van As, H.J.H. Brouwers, Q. Yu (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

This study investigates the suitability of alkali activated binders to replace Portland cement for lignocellulosic mineral-binder composite, aiming to lower the CO2 footprint. The effects of wood composition on the reaction kinetics of the binders and the formation of the reaction products are studied using isothermal calorimetry and ion chromatography. The ionic behaviour analysis of Ca2+ and Na+ ions in the binders shows that in presence of wood, a neutralisation of OH− ions and reduction of Ca2+ and Na+ ions during the first 24 h of curing take place, which alters the formation of C-A-S-H and N-A-S-H gels and influences the final composite performance. Moreover, the position of water absorbed by wood with different moisture levels is investigated by using T2 relaxometry Time Domain (TD) NMR to understand the required water amount for the binder reaction as well as the liquid uptake of the wood and occurring ion migration. The results show that a hybrid binder consisting of 70% alkali activated material and 30% cement applied without NaOH pre-treatment results in a composite with excellent mechanical performances and reduced environmental impacts of 61.5% compared to a pure cement system.
Original languageEnglish
Pages (from-to)808-818
Number of pages11
JournalJournal of Cleaner Production
Volume206
DOIs
Publication statusPublished - 2019

Fingerprint

Binders
Wood
Minerals
cement
liquid
ion
Composite materials
Liquids
mineral
Ions
ion chromatography
calorimetry
Cements
reaction kinetics
neutralization
footprint
nuclear magnetic resonance
Ion chromatography
environmental impact
gel

Keywords

  • Alkali activated binder
  • Ionic behaviour
  • Lignocellulose
  • Moisture content
  • NMR
  • Reaction kinetics

Cite this

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title = "Ionic interaction and liquid absorption by wood in lignocellulose inorganic mineral binder composites",
abstract = "This study investigates the suitability of alkali activated binders to replace Portland cement for lignocellulosic mineral-binder composite, aiming to lower the CO2 footprint. The effects of wood composition on the reaction kinetics of the binders and the formation of the reaction products are studied using isothermal calorimetry and ion chromatography. The ionic behaviour analysis of Ca2+ and Na+ ions in the binders shows that in presence of wood, a neutralisation of OH− ions and reduction of Ca2+ and Na+ ions during the first 24 h of curing take place, which alters the formation of C-A-S-H and N-A-S-H gels and influences the final composite performance. Moreover, the position of water absorbed by wood with different moisture levels is investigated by using T2 relaxometry Time Domain (TD) NMR to understand the required water amount for the binder reaction as well as the liquid uptake of the wood and occurring ion migration. The results show that a hybrid binder consisting of 70{\%} alkali activated material and 30{\%} cement applied without NaOH pre-treatment results in a composite with excellent mechanical performances and reduced environmental impacts of 61.5{\%} compared to a pure cement system.",
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Ionic interaction and liquid absorption by wood in lignocellulose inorganic mineral binder composites. / Doudart de la Grée, G.C.H.; Caprai, V.; van Dam, J.E.G.; van As, H.; Brouwers, H.J.H.; Yu, Q. (Corresponding author).

In: Journal of Cleaner Production, Vol. 206, 2019, p. 808-818.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Brouwers, H.J.H.

AU - Yu, Q.

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