Details
| Original language | English |
|---|---|
| Pages (from-to) | 763-768 |
| Number of pages | 6 |
| Journal | Cement and Concrete Composites |
| Volume | 30 |
| Issue number | 9 |
| Early online date | 20 Jun 2008 |
| Publication status | Published - Oct 2008 |
| Externally published | Yes |
Abstract
Fresh concrete can be considered as a suspension of grains of various sizes in a continuous fluid phase. The rheological properties of fresh concrete greatly depend on the physical factors, chemical and mineralogical characteristics of the fine components. Interparticle interactions occur during flow and modify the apparent rheological behaviour. Therefore, a thorough understanding of the rheological behaviour of cementitious suspensions with respect to particle packing is required. The objective of this study is to characterise the interrelationship between the flow properties and the particle packing density of the cementitious suspensions. The experimental investigation included Puntke tests for determining the packing density, and rheological tests that were performed in a rheometer for the characterisation of cement and silica fume (C + SF) as well as cement and fly ash (C + FA) mixtures. The effect of the water to powder ratio (w/p ratio) and the packing density on the flow properties of the cementitious suspensions was studied. From the study, it was observed that a good correlation exists between the w/p ratio and the yield value (g) for both C + SF and C + FA mixtures. The packing density shows a marked influence on the value of g for both mixtures, but has less influence on the value of plastic viscosity (h) for C + FA mixture.
Keywords
- Cementitious suspensions, Particle packing, Rheology, Viscosity, Yield value
ASJC Scopus subject areas
- Engineering(all)
- Building and Construction
- Materials Science(all)
- General Materials Science
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In: Cement and Concrete Composites, Vol. 30, No. 9, 10.2008, p. 763-768.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigation on the influence of granular packing on the flow properties of cementitious suspensions
AU - Nanthagopalan, Prakash
AU - Haist, Michael
AU - Santhanam, Manu
AU - Müller, Harald S.
N1 - Funding Information: The experimental work was carried out at the Institute of Concrete Structures and Building Materials, Karlsruhe, Germany. The author would like to thank Jennifer Scheydt, research scholar, for her valuable discussion and help in translating. The financial support provided by German Academic Exchange Service (DAAD) to the author during the stay in Germany is gratefully acknowledged.
PY - 2008/10
Y1 - 2008/10
N2 - Fresh concrete can be considered as a suspension of grains of various sizes in a continuous fluid phase. The rheological properties of fresh concrete greatly depend on the physical factors, chemical and mineralogical characteristics of the fine components. Interparticle interactions occur during flow and modify the apparent rheological behaviour. Therefore, a thorough understanding of the rheological behaviour of cementitious suspensions with respect to particle packing is required. The objective of this study is to characterise the interrelationship between the flow properties and the particle packing density of the cementitious suspensions. The experimental investigation included Puntke tests for determining the packing density, and rheological tests that were performed in a rheometer for the characterisation of cement and silica fume (C + SF) as well as cement and fly ash (C + FA) mixtures. The effect of the water to powder ratio (w/p ratio) and the packing density on the flow properties of the cementitious suspensions was studied. From the study, it was observed that a good correlation exists between the w/p ratio and the yield value (g) for both C + SF and C + FA mixtures. The packing density shows a marked influence on the value of g for both mixtures, but has less influence on the value of plastic viscosity (h) for C + FA mixture.
AB - Fresh concrete can be considered as a suspension of grains of various sizes in a continuous fluid phase. The rheological properties of fresh concrete greatly depend on the physical factors, chemical and mineralogical characteristics of the fine components. Interparticle interactions occur during flow and modify the apparent rheological behaviour. Therefore, a thorough understanding of the rheological behaviour of cementitious suspensions with respect to particle packing is required. The objective of this study is to characterise the interrelationship between the flow properties and the particle packing density of the cementitious suspensions. The experimental investigation included Puntke tests for determining the packing density, and rheological tests that were performed in a rheometer for the characterisation of cement and silica fume (C + SF) as well as cement and fly ash (C + FA) mixtures. The effect of the water to powder ratio (w/p ratio) and the packing density on the flow properties of the cementitious suspensions was studied. From the study, it was observed that a good correlation exists between the w/p ratio and the yield value (g) for both C + SF and C + FA mixtures. The packing density shows a marked influence on the value of g for both mixtures, but has less influence on the value of plastic viscosity (h) for C + FA mixture.
KW - Cementitious suspensions
KW - Particle packing
KW - Rheology
KW - Viscosity
KW - Yield value
UR - http://www.scopus.com/inward/record.url?scp=50149094102&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2008.06.005
DO - 10.1016/j.cemconcomp.2008.06.005
M3 - Article
AN - SCOPUS:50149094102
VL - 30
SP - 763
EP - 768
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
SN - 0958-9465
IS - 9
ER -