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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.
Showing 1-5 of 16 Abstracts search results
Document:
SP78-14
Date:
January 1, 1982
Author(s):
John C. King
Publication:
Symposium Papers
Volume:
78
Abstract:
Grout, shims, or both, plus anchors form the vital link between machines, equipment, and column bases and their foundations. Grout and/or shims hold the equipment up and anchors hold it down. Grout, as used in this paper, is any fluid, flowable, plastic, or packable material that can be used to fill the space between the underside of a machine or column and the foundation on which the unit is to rest, then harden there to support the unit. The most widely used materials for grouts are combinations of hydraulic cements, fine aggregates including graded iron particles, various additives including chemical admixtures, and water. In recent years, various epoxy combinations with and without suspended fine aggregate have also been employed. This paper discusses hydraulic cement base grouts that are intended to not only completely fill the space under a base plate initially, but also harden in tight contact with the plate and permanently support or participate in the support of that plate. Such grouts are generally referred to as "nonshrink." Reasonably obtainable properties that the engineer may require of such a grout and tests he may specify to assure the results he desires are described. The pluses and minuses of fluid, flowable, plastic, and dry-pack grouts are covered and techniques for placing grouts at each consistency are described and illustrated. A measurable definition of the terms fluid, flowable, plastic, and dry-pack is offered.
DOI:
10.14359/16915
SP78
Editor: Allan R. Porush
SP78 A collection of 15 papers on foundations for equipment and machinery, covering design and research. The topics include: baseplate grouting, elevated foundations for reciprocating machines, case studies of machine foundations under dynamic loads, pile supported machines, turbine pedestal structure, and more.
10.14359/14130
SP78-05
F. Aboul-Ella and M. Novak
A theoretical approach was developed and programmed to analyze dynamic response of turbomachinery frame foundations supported by piles or a foundation slab. The study investigates interaction of all components of the system, i.e. flexible rotors, visco-elastic oil film, space frame, flexible mat, piles and soil. The effect of the foundation on vibration amplitudes of the frame and rotors is demonstrated.
10.14359/16906
SP78-03
Gary R. Hall, George W. Read, Jr., and R. L. Trinklein
The properties of portland celllent based nonshrink grouts are discussed. A review of the basic engineering concepts involved is presented. A brief discussion on the chemistry involved in grout technology is presented. Performance criteria are discussed in some detail, along with methods of testing for the perfortilance criteria. A brief description of the various grouting systems available to the market place is presented.
10.14359/16904
SP78-06
David Weiner and Benat B. Broms
The design and construction of foundations for gangsaws are discussed. Criteria are proposed to evaluate the risk of damaging machines and buildings based on extensive measurements in sawmills in Sweden where in some cases damage had occurred. The results of a questionnaire indicate that problelms due to vibrations from gangsaws are common particularly where the foundations are supported on piles and where the ground water level is high. The questionnaire also indicates that a large number of sawmill workers (up to 752) are troubled by vibrations and noise. Several case records are presented which indicate that the natural frequency of sawmill buildings is often very close to the operating frequency of the gangsaws they house, exacerbating problems due to vibration. Remedial measures are discussed in the article such as changing the mass of the counterweight, the operating frequency or the geometry or weight of the foundation block. In two practical cases that are discussed the use of the tuning technique minimised interruptions in operation and prevented breakdowns which would otherwise have caused considerable financial loss.
10.14359/16907
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