Details
| Original language | English |
|---|---|
| Article number | 133678 |
| Journal | Construction and Building Materials |
| Volume | 408 |
| Early online date | 17 Oct 2023 |
| Publication status | Published - 8 Dec 2023 |
Abstract
Keywords
- Rheology, Ettringite, Cement model system, Quartz suspension, Analytics
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Building and Construction
- Engineering(all)
- Civil and Structural Engineering
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In: Construction and Building Materials, Vol. 408, 133678, 08.12.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of in situ ettringite formation on the rheological properties of quartz suspensions
AU - Kißling, Patrick A.
AU - Link, Julian
AU - Heinemann, Melanie
AU - Lübkemann-Warwas, Franziska
AU - Best, Felix Rieck genannt
AU - Sowoidnich, Thomas
AU - Mundstock, Alexander
AU - Ludwig, Horst-Michael
AU - Haist, Michael
AU - Bigall, Nadja C.
N1 - Publisher Copyright: © 2023
PY - 2023/12/8
Y1 - 2023/12/8
N2 - Cement suspensions are subject to hydration processes causing dissolution of cement clinker, precipitation of hydration products and changes in the ion content of the carrier liquid. These mechanisms take place in parallel and control the workability of cement suspensions. The precipitation of nano-granular ettringite is currently believed to be one of the key influencing factors for rheological properties of fresh cement suspensions. In order to quantify the effect of ettringite precipitation from other precipitation or dissolution processes onto the rheological behaviour, a model suspension consisting of quartz powder and in situ formed ettringite is used, enabled by implementing a new upscalable synthesis route of ettringite. The quantity of formed ettringite in the model suspension is varied and derived qualitatively from X-ray diffraction as well as quantitatively from inductively coupled plasma optical emission spectrometry and thermogravimetric analysis. The influence of the ettringite content on the rheological properties is determined and linked to the specific surface of the formed ettringite particles. This allows a quantification of the controlling mechanism of ettringite and the dependency of these mechanisms on particle properties. The correlation of the results to a reference suspension without ettringite verifies the statement of influence.
AB - Cement suspensions are subject to hydration processes causing dissolution of cement clinker, precipitation of hydration products and changes in the ion content of the carrier liquid. These mechanisms take place in parallel and control the workability of cement suspensions. The precipitation of nano-granular ettringite is currently believed to be one of the key influencing factors for rheological properties of fresh cement suspensions. In order to quantify the effect of ettringite precipitation from other precipitation or dissolution processes onto the rheological behaviour, a model suspension consisting of quartz powder and in situ formed ettringite is used, enabled by implementing a new upscalable synthesis route of ettringite. The quantity of formed ettringite in the model suspension is varied and derived qualitatively from X-ray diffraction as well as quantitatively from inductively coupled plasma optical emission spectrometry and thermogravimetric analysis. The influence of the ettringite content on the rheological properties is determined and linked to the specific surface of the formed ettringite particles. This allows a quantification of the controlling mechanism of ettringite and the dependency of these mechanisms on particle properties. The correlation of the results to a reference suspension without ettringite verifies the statement of influence.
KW - Rheology
KW - Ettringite
KW - Cement model system
KW - Quartz suspension
KW - Analytics
UR - http://www.scopus.com/inward/record.url?scp=85174171557&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2023.133678
DO - 10.1016/j.conbuildmat.2023.133678
M3 - Article
VL - 408
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 133678
ER -