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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Effect OF Weight Of Tampers And Number Of Tamps On The Flexural Strength Of Concrete Silo Staves
Author(s): C. A. Hughes, Dalton G. Miller, and Philip W. Manson
Publication: Journal Proceedings
Appears on pages(s): 37-48
Abstract:Reports tests of 502 concrete silo staves made at commercial plants. The transverse strengths were de- termined for 324. The chief variables were the weight of tampers and the number of tamps per stave. The number of staves per sack, the aggregate grading, and the consistency were also varied. For the materials and methods of manufacture used - (a) Increasing the weiaht of the tampers from 50 to 75 lb. increased the transverse strength’, the increase varying’ both with the number of tamps and the mix. (b) The transverse strength increased ‘with increase in ‘number of tamps from 2 to 6 tamps. Beyond 6 tamps the effect on the transverse strength was influenced also by the mix and by the weight of the tampers. (c) In nearly all cases staves made with 2 tamps of the heavy tamper were stronger than staves made with 6 tamps of the normal one. (d) The thickness of tamped staves varies considerably. Hence if the load per inch of width is to be used as a measure of quality, it should be cor- rected to correspond to a specified thickness.considerably. Hence if the load per inch of width is to be used as a measure of quality, it should be cor- rected to correspond to a specified thickness.
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