Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete
The accessibility to rheological parameters for concrete is becoming more and more relevant. This is mainly related to the constantly emerging challenges, such as not only the development of high-strength concretes is progressing very fast but also the simulation of the flow behaviour is of high imp...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-03-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/arh-2022-0140 |
| _version_ | 1797848793840877568 |
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| author | Josch Sebastian Jesinghausen Steffen Schmid Hans-Joachim |
| author_facet | Josch Sebastian Jesinghausen Steffen Schmid Hans-Joachim |
| author_sort | Josch Sebastian |
| collection | DOAJ |
| description | The accessibility to rheological parameters for concrete is becoming more and more relevant. This is mainly related to the constantly emerging challenges, such as not only the development of high-strength concretes is progressing very fast but also the simulation of the flow behaviour is of high importance. The main problem, however, is that the rheological characterisation of fresh concrete is not possible via commercial rheometers. The so-called concrete rheometers provide valuable relative values for comparing different concretes, but they cannot measure absolute values. Therefore, we developed an adaptive coaxial concrete rheometer (ACCR) that allows the measurement of fresh concrete with particles up to dmax=5.5mm{d}_{{\rm{\max }}}=5.5\hspace{.5em}{\rm{mm}}. The comparison of the ACCR with a commercial rheometer showed very good agreement for selected test materials (Newtonian fluid, shear thinning fluid, suspension, and yield stress fluid), so that self-compacting concrete was subsequently measured. Since these measurements showed a very high reproducibility, the rheological properties of the fresh concrete could be determined with high accuracy. The common flow models (Bingham (B), Herschel–Bulkley, modified Bingham (MB) models) were also tested for their applicability, with the Bingham and the modified Bingham model proving to be the best suitable ones. |
| first_indexed | 2024-04-09T18:33:12Z |
| format | Article |
| id | doaj.art-9b08b8eb06f3418ab24c7abb2179c6a6 |
| institution | Directory Open Access Journal |
| issn | 1617-8106 |
| language | English |
| last_indexed | 2024-04-09T18:33:12Z |
| publishDate | 2023-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Applied Rheology |
| spelling | doaj.art-9b08b8eb06f3418ab24c7abb2179c6a62023-04-11T17:07:12ZengDe GruyterApplied Rheology1617-81062023-03-01331129830710.1515/arh-2022-0140Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concreteJosch Sebastian0Jesinghausen Steffen1Schmid Hans-Joachim2Particle Technology Group, Paderborn University, Paderborn, GermanyParticle Technology Group, Paderborn University, Warburg Street 100, Paderborn, North Rhine-Westphalia, 33098, GermanyParticle Technology Group, Paderborn University, Paderborn, GermanyThe accessibility to rheological parameters for concrete is becoming more and more relevant. This is mainly related to the constantly emerging challenges, such as not only the development of high-strength concretes is progressing very fast but also the simulation of the flow behaviour is of high importance. The main problem, however, is that the rheological characterisation of fresh concrete is not possible via commercial rheometers. The so-called concrete rheometers provide valuable relative values for comparing different concretes, but they cannot measure absolute values. Therefore, we developed an adaptive coaxial concrete rheometer (ACCR) that allows the measurement of fresh concrete with particles up to dmax=5.5mm{d}_{{\rm{\max }}}=5.5\hspace{.5em}{\rm{mm}}. The comparison of the ACCR with a commercial rheometer showed very good agreement for selected test materials (Newtonian fluid, shear thinning fluid, suspension, and yield stress fluid), so that self-compacting concrete was subsequently measured. Since these measurements showed a very high reproducibility, the rheological properties of the fresh concrete could be determined with high accuracy. The common flow models (Bingham (B), Herschel–Bulkley, modified Bingham (MB) models) were also tested for their applicability, with the Bingham and the modified Bingham model proving to be the best suitable ones.https://doi.org/10.1515/arh-2022-0140suspensionconcrete rheologycoaxial rheometer |
| spellingShingle | Josch Sebastian Jesinghausen Steffen Schmid Hans-Joachim Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete Applied Rheology suspension concrete rheology coaxial rheometer |
| title | Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete |
| title_full | Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete |
| title_fullStr | Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete |
| title_full_unstemmed | Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete |
| title_short | Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete |
| title_sort | development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete |
| topic | suspension concrete rheology coaxial rheometer |
| url | https://doi.org/10.1515/arh-2022-0140 |
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