Hydrous Carbonate-Containing Brucite (Hcb) in Mgo / Hydromagnesite Blends

German, Alexander; Winnefeld, Frank; Lura, Pietro; Rentsch, Daniel; Lothenbach, Barbara

doi:10.2139/ssrn.4442693

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2023

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“…In the present study, see [12,13] for more details, the early hydration kinetics is investigated by isothermal calorimetry as well as the strength development of mortar samples. Furthermore, the hydrate assemblage and the pore solution are characterized in detail at temperatures between 7 and 60°C.…”

Section: Introductionmentioning

confidence: 99%

Low‐CO₂ cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties

Winnefeld,

German,

Lura

et al. 2023

ce papers

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Binders based on blends of reactive magnesia and hydromagnesite are low‐CO2 or even carbon‐negative cements in case the MgO is generated from magnesium silicates or Mg‐containing brines. When MgO is hydrated with water alone, a well crystalline brucite forms, but no measurable strength is developing. In the presence of hydromagnesite, the hydration of MgO is accelerated and the hydrate assemblage is changed. A poorly‐crystalline brucite containing some carbonate is the main hydration product. Furthermore, a kind of “gel‐water” is observed, which is lost at temperatures above 40‐60°C. This brucite‐like phase is responsible for strength formation in MgO‐hydromagnesite blends. After 28 days, a mortar compressive strength is reached similar to the one of a Portland cement of strength class 32.5.

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Section: Introductionmentioning

confidence: 99%

Low‐CO₂ cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties

Winnefeld,

German,

Lura

et al. 2023

ce papers

Self Cite

View full text Add to dashboard Cite

show abstract

Hydrous Carbonate-Containing Brucite (Hcb) in Mgo / Hydromagnesite Blends

Cited by 1 publication

References 49 publications

Low‐CO₂ cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties

Low‐CO₂ cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties

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Hydrous Carbonate-Containing Brucite (Hcb) in Mgo / Hydromagnesite Blends

Cited by 1 publication

References 49 publications

Low‐CO2 cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties

Low‐CO2 cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties

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Low‐CO₂ cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties

Low‐CO₂ cements based on magnesium oxide / hydromagnesite blends – hydration mechanism and mechanical properties