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Assessment and classification of performance mixers

Final report

  • RILEM Technical Committees
  • RILEM TC 150-ECM: Efficiency of Concrete Mixers
  • Published:
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Abbreviations

Cap:

Capacity [m3]

Ct:

Cycle time [s]

d:

Granularity [mm]

f:

Absolute error [%]

f/p:

Relative error [%]

G:

Weight of sample [N]

ΔG:

Weight range of sample [N]

Ith :

Theoretical mixer throughput [t/h]

n:

Number of individual samples; number of cycles [-];[1/h]

nT :

Particle number [-]

p:

Confidence interval; probability of the binomial distribution [%]

P:

Statistical certainty [%]

Qth :

Theoretical mixer throughput [m3/h]

s:

Standard deviation [-]

s2 :

Empirical variance [-]

t:

Correction factor; mixing time [-];[s]

TC:

Test concrete [-]

v:

Coefficient of variation [%]

Vn :

Nominal content [m3]

w/c:

Water-cement-ratio [-]

w/f:

Water-fines-ratio [-]

xj :

Individual sample [-]

x:

Arithmetical mean value [-]

μ:

Mathematical expectation [%]

σ2 :

Variance [-]

References

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Author information

Authors and Affiliations

  1. Institut für Bauverfahrens- und Umwelttechnik (IBU), Trier University of Applied Sciences (FH), Germany

    H. Beitzel

  2. Laboratoire Central des Ponts et Chaussées, LCPC-Nantes, France

    Y. Charonnat

  3. University of Karlsruhe, Germany

    M. Beitzel

Authors
  1. H. Beitzel
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  2. Y. Charonnat
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  3. M. Beitzel
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Additional information

TC MEMBERSHIP:Chairman: Harald Beitzel, Germany;Secretary: Yves Charonnat, France;Members: Peter Bartos, Great Britain; Claude Legrand, France, Örjan Peterson, Sweden, Joseph Sikuler, Israel; Toni Steiner, Switzerland.

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Beitzel, H., Charonnat, Y. & Beitzel, M. Assessment and classification of performance mixers. Mat. Struct. 36, 250–264 (2003). https://doi.org/10.1007/BF02479619

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