By G H Tattersall
This booklet is a successor to the author's hugely profitable 'Workability of Concrete' released in 1976 and, back, is written particularly for practicing engineers and concrete technologists. It accommodates the result of an extra 15 years examine and develops the therapy of workability as a estate to be measured when it comes to constants, which used to be brought within the previous publication. The clinical foundation is just defined and used for the outline of very sensible equipment and equipment. This ends up in elucidation of difficulties surrounding the subject of workability and to an account of the possibility of quality controls. The validity and boundaries of normal tools of workability evaluation are absolutely thought of and there are a number of chapters at the results on workability of the homes and proportions of combine components.
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Extra info for Workability and quality control of concrete
1961) Mechanical packing of spherical particles, Journal of the American Chemical Society , 44, 513. 12. F. C. (1928) The determination of the workability of concrete, Proceedings of the American Society for Testing Materials , 28, Part II, 499– 504. 13. F. C. (1930) Further studies on the workability of concrete, Proceedings of the American Society for Testing Materials, 30, Part II, 654– 73. 14. D. (1931) Determining characteristics of concrete in the mixer drum, Journal of the American Concrete Institute, Proceedings , 28 (9), 59–72.
7. T. (1962) Measurement of the workability of concrete, Journal of the American Concrete Institute, Proceedings, 59(8), 1071–80. 8. P. and Bahramian, B. (1967) Workability of concrete: a comparison of existing tests, Journal of Materials , 2(3), 519–36. 9. R. J. (1977) A consideration of the DIN flow table, Concrete , 11(12), 29–30 (discussion ibid. ) 10. C. (Editor). (1976) Superplasticizing admixtures in concrete . Report of a joint working party of the Cement Admixtures Association and the Cement and Concrete Association.
Bloomer 9 has discussed in detail the requirements for the design of a coaxial-cylinders viscometer suitable for measurements on concrete, and points out that it is necessary to consider gap size, the ratio of the cylinder diameters, end effects, and possible slippage. The effect of this is to impose conditions on the dimensions of the apparatus and it is immediately apparent that none of the investigators mentioned above used viscometers that satisfied the criteria, especially so in the case of gap size.