Skip to main content
SpringerLink
Log in

A concrete rheometer and its application to a rheological study of concrete mixes

  • Published:
Rheologica Acta Aims and scope Submit manuscript

Summary

The description of aCouette type rheometer which has been developed for measuring some rheological properties of fluid concrete mixes is given with a discussion of experimental results.

The instrument produces a recorded trace which is essentially a stress decay curve attributed to thixotropic breakdown of the material structure. This breakdown curve is predicted better by an expression of the power law type than of the exponential type. Analysis of the empirical flow curves shows that, despite some limitations in its essential geometry, the instrument reflects the flow behaviour of the full concrete mix. Up to rotational speeds of 26 r.p.m., the flow curves are typical ofBingham plastics.

The yield values and plastic viscosities of the mixes which are very fluid and typical of piling concrete are of the order of 2.5–12.0 kN/m2 (or 25000–120000 dynes/cm2) and 5–40 kilopoises (5000–40000 poises) respectively. These quantities vary with concrete mix parameters, and increase exponentially with decrease in water/cement ratio.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Powers, T. C. andE. M. Wiier, Proc. Amer. Soc. Test. Mater.41, 1003–1015 (1941).

    Google Scholar 

  2. Van Wazer, J. E., et al., Viscosity and flow measurement. (New York 1963.)

  3. Dsir, Road Res. Laboratory, Road Note No. 4, Second Edn. (1962).

  4. Green, H., Industrial Rheology and Rheological Structures. (New York 1949.)

  5. Tattersall, G. H., Brit. Appl. Physics.6, 165–167 (1955).

    Google Scholar 

  6. Nessim, A. A. andWajdar, Mag. of Conc. Res.17, No. 51, 59–68 (1965).

    Google Scholar 

  7. Scott Blair, G. W., An introduction to industrial rheology. (Philadelphia 1938.)

  8. British Standard Institution, Methods of testing concrete. B.S. 1881 (Part II) (1970).

Download references

Author information

Authors and Affiliations

  1. Cementation Research Ltd., Rickmansworth, Herts, England

    Osondu J. Uzomaka

  2. Dept. of Civil Engineering, University of Nigeria, Nsukka, E.C.S., Nigeria, W. Africa

    Osondu J. Uzomaka

Authors
  1. Osondu J. Uzomaka
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

With 15 figures and 1 table

Rights and permissions

Reprints and permissions

About this article

Cite this article

Uzomaka, O.J. A concrete rheometer and its application to a rheological study of concrete mixes. Rheol Acta 13, 12–21 (1974). https://doi.org/10.1007/BF01526878

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01526878

Keywords

Search

Navigation