Xiao, Peng ; Chen, Xi ; Cao, Donglin ; Yuan, Yong ; Dai, Ying ; Ukrainczyk, Neven ; Koenders, Eddie (2024)
Mathematical Modeling of Initial Exothermic Behavior and Thixotropic Properties in Nanoclay-Enhanced Cementitious Materials.
In: Materials, 17 (7)
doi: 10.3390/ma17071502
Article, Bibliographie
This is the latest version of this item.
Abstract
In the realm of cementitious materials, integrating nanoclay shows promise in enhancing properties relevant to additive manufacturing. This paper presents a novel mathematical model that combines simple empirical dissolution/nucleation Avrami-like kinetics with a thixotropic kinetics equation. To analyze the initial exothermic peak, two sets of the calculation parameter function are built to describe the exothermic rate as a function of time, following an exponential pattern. This allows for the prediction of the changes in cumulative heat and heat rate during hydration, considering different concentrations of nanoclay. In the rheological aspect, the relationship between shear stress, shear rate, and time is modeled as a combination of exponential dependencies. This enables the prediction of the variations in shear stress with one variable while holding the other constant (either time or shear rate). By integrating these aspects, this model effectively describes both the first exothermal peak and the rheological behavior during cement hydration with the inclusion of nanoclay. Validated against experimental results, these models demonstrate good accuracy (overall below 3% error), reliability, and applicability. The findings offer valuable insights into the thermal and rheological aspects of concrete printing, enabling informed design decisions for both scientific and industrial applications.
| Item Type: | Article |
|---|---|
| Erschienen: | 2024 |
| Creators: | Xiao, Peng ; Chen, Xi ; Cao, Donglin ; Yuan, Yong ; Dai, Ying ; Ukrainczyk, Neven ; Koenders, Eddie |
| Type of entry: | Bibliographie |
| Title: | Mathematical Modeling of Initial Exothermic Behavior and Thixotropic Properties in Nanoclay-Enhanced Cementitious Materials |
| Language: | English |
| Date: | 26 March 2024 |
| Place of Publication: | Basel |
| Publisher: | MDPI |
| Journal or Publication Title: | Materials |
| Volume of the journal: | 17 |
| Issue Number: | 7 |
| Collation: | 15 Seiten |
| DOI: | 10.3390/ma17071502 |
| Corresponding Links: | |
| Abstract: | In the realm of cementitious materials, integrating nanoclay shows promise in enhancing properties relevant to additive manufacturing. This paper presents a novel mathematical model that combines simple empirical dissolution/nucleation Avrami-like kinetics with a thixotropic kinetics equation. To analyze the initial exothermic peak, two sets of the calculation parameter function are built to describe the exothermic rate as a function of time, following an exponential pattern. This allows for the prediction of the changes in cumulative heat and heat rate during hydration, considering different concentrations of nanoclay. In the rheological aspect, the relationship between shear stress, shear rate, and time is modeled as a combination of exponential dependencies. This enables the prediction of the variations in shear stress with one variable while holding the other constant (either time or shear rate). By integrating these aspects, this model effectively describes both the first exothermal peak and the rheological behavior during cement hydration with the inclusion of nanoclay. Validated against experimental results, these models demonstrate good accuracy (overall below 3% error), reliability, and applicability. The findings offer valuable insights into the thermal and rheological aspects of concrete printing, enabling informed design decisions for both scientific and industrial applications. |
| Uncontrolled Keywords: | cementitious materials, additive manufacturing, nanoclay, cement hydration, nucleation, initial exothermic reactions, thixotropy, mathematical modeling |
| Identification Number: | Artikel-ID: 1502 |
| Additional Information: | This article belongs to the Section Construction and Building Materials |
| Classification DDC: | 600 Technology, medicine, applied sciences > 624 Civil engineering and environmental protection engineering |
| Divisions: | 13 Department of Civil and Environmental Engineering Sciences 13 Department of Civil and Environmental Engineering Sciences > Institute of Construction and Building Materials |
| Date Deposited: | 08 May 2024 06:36 |
| Last Modified: | 08 May 2024 06:36 |
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| Suche nach Titel in: | TUfind oder in Google |
Available Versions of this Item
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Mathematical Modeling of Initial Exothermic Behavior and Thixotropic Properties in Nanoclay-Enhanced Cementitious Materials. (deposited 07 May 2024 09:38)
- Mathematical Modeling of Initial Exothermic Behavior and Thixotropic Properties in Nanoclay-Enhanced Cementitious Materials. (deposited 08 May 2024 06:36) [Currently Displayed]
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