Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 10th fib International PhD Symposium in Civil Engineering |
| Editors | Nicolas Rouleau, Josee Bastien, Mathieu Fiset, Mathieu Thomassin |
| Pages | 5-11 |
| Number of pages | 7 |
| ISBN (electronic) | 9782980676215 |
| Publication status | Published - 2014 |
| Event | 10th International Federation for Structural Concrete (fib) International PhD Symposium in Civil Engineering 2014 - Quebec City, Canada Duration: 21 Jul 2014 → 23 Jul 2014 |
Publication series
| Name | Proceedings of the 10th fib International PhD Symposium in Civil Engineering |
|---|
Abstract
The dimensions of today's structures require a concrete that is capable of flowing over long distances and through very tight spacing of reinforcements. However, flowable concretes are very susceptible to segregation, especially under pumping pressures. In this paper, a step by step optimization and design process for the production of flowable concretes is introduced. The concrete is considered to be composed of the paste as the liquid phase and the aggregates as the solid phase. First, the tlowability and viscosity characteristics of different paste compositions are investigated using the Viskomat NT Rheometer and mini slump flow tests. Then, the minimum paste volume for a specific aggregate composition is determined using the aggregates' paste requirement test. Finally, a reference concrete composition is made by combining the required amount of the optimized paste with the aggregates. Thereafter, different parameters from the reference concrete, such as the water - fines ratio, amount of superplasticizer, type of aggregate and aggregate gradation are altered in order to investigate their effect on the pumpability and pump-stability properties of the concrete. The pumpability and pump-stability of the concretes were investigated using specially developed pump resistance simulator (PuReSi) and high pressure filter press (HPFP) respectively. The test results have shown that a slight variation in the above mentioned parameters could have significant influences on the flowability, pumpability and pump-stability characteristics of a concrete.
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Engineering(all)
- Architecture
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Proceedings of the 10th fib International PhD Symposium in Civil Engineering. ed. / Nicolas Rouleau; Josee Bastien; Mathieu Fiset; Mathieu Thomassin. 2014. p. 5-11 (Proceedings of the 10th fib International PhD Symposium in Civil Engineering).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Optimization and design strategies for pumpable, flowable and stable concretes
AU - Abebe, Yared Assefa
AU - Lohaus, Ludger
PY - 2014
Y1 - 2014
N2 - The dimensions of today's structures require a concrete that is capable of flowing over long distances and through very tight spacing of reinforcements. However, flowable concretes are very susceptible to segregation, especially under pumping pressures. In this paper, a step by step optimization and design process for the production of flowable concretes is introduced. The concrete is considered to be composed of the paste as the liquid phase and the aggregates as the solid phase. First, the tlowability and viscosity characteristics of different paste compositions are investigated using the Viskomat NT Rheometer and mini slump flow tests. Then, the minimum paste volume for a specific aggregate composition is determined using the aggregates' paste requirement test. Finally, a reference concrete composition is made by combining the required amount of the optimized paste with the aggregates. Thereafter, different parameters from the reference concrete, such as the water - fines ratio, amount of superplasticizer, type of aggregate and aggregate gradation are altered in order to investigate their effect on the pumpability and pump-stability properties of the concrete. The pumpability and pump-stability of the concretes were investigated using specially developed pump resistance simulator (PuReSi) and high pressure filter press (HPFP) respectively. The test results have shown that a slight variation in the above mentioned parameters could have significant influences on the flowability, pumpability and pump-stability characteristics of a concrete.
AB - The dimensions of today's structures require a concrete that is capable of flowing over long distances and through very tight spacing of reinforcements. However, flowable concretes are very susceptible to segregation, especially under pumping pressures. In this paper, a step by step optimization and design process for the production of flowable concretes is introduced. The concrete is considered to be composed of the paste as the liquid phase and the aggregates as the solid phase. First, the tlowability and viscosity characteristics of different paste compositions are investigated using the Viskomat NT Rheometer and mini slump flow tests. Then, the minimum paste volume for a specific aggregate composition is determined using the aggregates' paste requirement test. Finally, a reference concrete composition is made by combining the required amount of the optimized paste with the aggregates. Thereafter, different parameters from the reference concrete, such as the water - fines ratio, amount of superplasticizer, type of aggregate and aggregate gradation are altered in order to investigate their effect on the pumpability and pump-stability properties of the concrete. The pumpability and pump-stability of the concretes were investigated using specially developed pump resistance simulator (PuReSi) and high pressure filter press (HPFP) respectively. The test results have shown that a slight variation in the above mentioned parameters could have significant influences on the flowability, pumpability and pump-stability characteristics of a concrete.
UR - http://www.scopus.com/inward/record.url?scp=85015404971&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85015404971
T3 - Proceedings of the 10th fib International PhD Symposium in Civil Engineering
SP - 5
EP - 11
BT - Proceedings of the 10th fib International PhD Symposium in Civil Engineering
A2 - Rouleau, Nicolas
A2 - Bastien, Josee
A2 - Fiset, Mathieu
A2 - Thomassin, Mathieu
T2 - 10th International Federation for Structural Concrete (fib) International PhD Symposium in Civil Engineering 2014
Y2 - 21 July 2014 through 23 July 2014
ER -