00619256

Component

http://onlinepubs.trb.org...trr/1991/1310/1310-013.pdf

https://scholar.google.co...nski&publication_year=1991

There is much interest in the industry in finding safe, reliable, and economic ways to detoxify and dispose of production wastes. A laboratory test program was designed to study the feasibility of reuse of solidified steel industry waste sludges as a construction material. The particular application reported is the use of the material as a capping barrier system over an existing lagoon. Random cracking of the solidified slabs is investigated. Various strength tests on cured specimens of wet mixed and solidified samples were conducted. The specimens were cured in seven different environments of temperature and humidity. The laboratory tests included unconfined compression, unconfined tension, and fracture toughness tests. The strength parameters were correlated with curing time, curing temperature, mix water content, and proportion of surface active reagents added. It was observed that the curing conditions that brought about higher compressive strengths were not favorable for the development of fracture resistance of the material. The unconfined compressive and tensile strengths of the material appeared to gain high values when the material was cured in high humidity-moderate temperature environments, whereas its fracture resistance improved at low moisture gradients. The high and low humidity conditions resulted in poor fracture resistance. The results obtained with varying contents of the surface active reagents indicated that there may be optimum proportions of these additives for which the highest strength and fracture resistance values are developed. Increasing the mix water content appeared to reduce both the strength and fracture resistance of the material.

This paper appears in Transportation Research Record No. 1310, Construction Innovations 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01407141

p. 93-105

1991

Transportation Research Record

0309051193

Figures (15) ; References (16) ; Tables (2)

Building materials; Concrete curing; Fracture mechanics; Fracture properties; Iron and steel industry; Laboratory tests; Moisture content; Reagents; Recycling; Sludge (Deposit); Strength of materials; Wastes

Unconfined compression

Environment; Geotechnology; Highways; Materials; I35: Miscellaneous Materials

TRIS, TRB, ATRI

Feb 29 1992 12:00AM

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