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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 30 Abstracts search results
Document:
SP105-25
Date:
December 1, 1987
Author(s):
Vijay K. Sood and Sat P. Gupta
Publication:
Symposium Papers
Volume:
105
Abstract:
In multistory framed structures, three kinds of connections exist, namely, cross-type, tee-type, and knee-type. Experimental investigations were made to study the behavior of 50 such beam-column connections of conventional and steel fiber concrete (SFC) when tested under static, as well as slow-cycle fatigue, loading. In all, 10 cross-type specimens of full-scale two-span beam with column stub were tested. Four cross-type connections were cast with conventional concrete, two with steel fibrous concrete in the entire length and four with SFC in the joint region only. The test results showed that SFC improved the ductility at the joint region, increased load-carrying capacity, decreased crack width, eliminated shear reinforcement, and overcame the problem of spalling of concrete in the joint region. The testing work also included 20 tee-type and 20 knee-type connections with 12 of each tested under static load and eight under slow-cycle fatigue load. The percentage was kept as 0.0, 0.6, 0.8, and 1.0 of concrete volume. Instrumentation was done to measure deflections, rotations, strains, and crack widths.
DOI:
10.14359/2923
SP105-18
George Y. Wu
The U.S. Navy is evaluating jet-blast and heat-resistant materials for high-temperature pavements. The research program includes laboratory and jet exhaust blast tests. Paper describes the jet exhaust blast tests on heat-resistant pavement materials reinforced with stainless steel fiber. The optimum steel fiber content for jet blast-resistant pavement was about 0.8 to 1.2 percent by volume. The test panels prepared by casting were stronger than those by gunning. The results from the jet exhaust blast tests were used in the design of a full-scale V/TOL test pad, AV-8B power check pads, and fire-fighting training facilities.
10.14359/2192
SP105-23
George Y. Wu and Michael P. Jones
Paper presents the U.S. Navy's experience with the performance of steel fiber reinforced concrete airfield pavements and techniques evaluated to alleviate the problem of exposed surface steel fibers. The exposed surface steel fibers posed a potential foreign object damage hazard to jet engines and injury hazard to ground support personnel. The Navy has elected to use the standard Navy PCC slab size (12.5 x 15 ft) and thickness for SFRC pavements because of slab curling and corner cracking problems on SFRC pavements. The diamond blade bump grinding technique is preferred for removing surface steel fibers because of its cost and life expectancy.
10.14359/2204
SP105-29
R. N. Swamy, R. Jones and T. P. Chiam
Paper presents extensive data on the influence of steel fibers, alone or in conjunction with conventional stirrups, on shear transfer in concrete. The test specimens used in this study were of the push-off type with an initially uncracked or cracked shear plane. The main variables investigated include fiber volume, amount of stirrups, and the type of concrete. The results show that fibers enhance the ultimate shear transfer strength in both uncracked and precracked specimens. In the latter, the ultimate shear strength can be expressed on the basis of Coulomb's criterion. Fibers increase the residual shear transfer strength, and the shear transfer stiffness can be related to crack width. The shear transfer strength was generally lower in lightweight concrete than in normal-weight concrete.
10.14359/2217
SP105-21
Zygmunt Jamrozy and Jan Olek
Paper focuses on technological aspects of steel fiber reinforced concrete (SFRC) related to the workability improvement, unconventional compaction techniques, and low-pressure steam curing. Major research data are presented, along with suggestions for future applications of some of the techniques discussed.
10.14359/2542
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