Comparative Study of Slags Stabilized with Fly Ash and Dolime for Utilization in Base Course
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 10
Abstract
There is a growing need to replace natural aggregates in road construction with new, alternative materials owing to the scarcity of natural resources. On the other hand, generation of huge quantities of waste from industries like iron, steel, copper, and thermal power is resulting in shortages of disposal areas and causing serious environmental pollution. In this paper, important engineering properties—unconfined compressive strength, triaxial shear strength, elastic modulus, resilient modulus, and permanent strain characteristics—of copper slag, fine and coarse steel slag, and blast furnace slag stabilized with fly ash and dolime are investigated for their effective utilization in the base course of flexible pavements, and compared with those of conventional wet-mix macadam (WMM). Deviator stress at failure and elastic modulus of the slag/fly ash/dolime mixes obtained in the present study are much greater than those of the WMM. These mixes also exhibit higher resilient modulus and lower permanent strain than the WMM. The performance of various stress-dependent models for the prediction of resilient modulus is compared, and the model constants of these mixes for a three-parameter model are presented.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 10 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Aug 26, 2016
Accepted: Mar 22, 2017
Published online: Jun 28, 2017
Published in print: Oct 1, 2017
Discussion open until: Nov 28, 2017
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