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http://dx.doi.org/10.14190/JRCR.2021.9.4.545

A Study on Strength and Durability of Vibrated and Rolled Method Mortar Mixed with Desulfurized Gypsum and Ferronickel Slag Fine Powder  

Yoo, Jeong-Hwan (Department of Civil Engineering, Sangmyung University)
Park, Sang-Soon (Department of Civil Engineering, Sangmyung University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.9, no.4, 2021 , pp. 545-552 More about this Journal
Abstract
In this study, strength and durability evaluations are performed on vibrated-rolled method mortar mixtures containing desulfurized gypsum and ferronickel slag powder. Desulfurized gypsum and ferronickel slag fine powders were substituted for 25% limestone fine powders u sed in the manu factu re of VR tu bes, and mortar specimens were prepared u sing vibrated-rolled method. Accordingly, flexural and compressive strengths were performed to evaluate the strength, and chlorine ion penetration resistance and sulfuric acid resistance tests were performed to evaluate durability. Flexural and compressive strength were improved in the range 20 to 60% of desu lfu rized gypsu m among admixtu res, and the amou nt of passing charge decreased in the choride ion penetration resistance test in the range of 20 to 80% of desulfurized gypsum. As for the resistance to su lfu ric acid, when the proportion of desu lfu rized in the admixtu re was 40%, the strength and weight change rate according to the immersion period was reduced. Appropriate use of desulfurized gypsum and ferronickel slag powder is expected to improve performance in terms of strength and durability.
Keywords
Desulfurized gypsum; Ferronickel slag powder; Vibrated and rolled method; Durability;
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