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http://dx.doi.org/10.7844/kirr.2021.30.5.10

A Study on the Characteristics of Clinker and Cement as Chlorine Content  

Lee, Young-Jun (Energy & Environmental Division, Korea Institute of Ceramic Eng. & Tech.)
Kim, Nam-Il (Energy & Environmental Division, Korea Institute of Ceramic Eng. & Tech.)
Cho, Jeong-Hoon (Energy & Environmental Division, Korea Institute of Ceramic Eng. & Tech.)
Seo, Sung-Kwan (Energy & Environmental Division, Korea Institute of Ceramic Eng. & Tech.)
Chu, Yong-Sik (Energy & Environmental Division, Korea Institute of Ceramic Eng. & Tech.)
Publication Information
Resources Recycling / v.30, no.5, 2021 , pp. 10-16 More about this Journal
Abstract
In this study, a clinker was prepared using raw materials with CaCl2. The characteristics of the chlorine-added clinker and cement were analyzed. The clinker modulus were set to Lime Saturation Factor (LSF) 92, Silica modulus (SM) 2.5, and Iron Modulus (IM) 1.5. The physical properties of cement using the chlorine-containing clinker were characterized. As the chlorine content increased, the free-CaO content in the clinker decreased, and that in the 2000 ppm clinker was reduced by approximately 40% compared to that in the 0 ppm clinker. There was an increase in the amount of chlormayenite, with a content of up to 3.4% present in the 2000 ppm clinker. The amounts of alite and belite also slightly increased. The compressive strength of mortar at 3 days and 7 days increased as the chlorine content increased. This trend was presumed to arise from the effect of hydration, which was promoted by the presence of chlorine. The compressive strength of 1000 ppm mortar increased by approximately 20% compared to that of 0 ppm mortar.
Keywords
chlorine; calcium chloride; clinker; chlormayenite; compressive strength;
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