2017•Materials science forumRequires access

Cementitious Activity Evaluation of Steel Slag by EDTA-NaOH Solution Extraction Method

Zai Bo Li, Tu Sheng He, Xu Guang Zhao, San Yin Zhao

Abstract

In order to establish a rapid evaluation method of steel slag cementitious activity, extraction test of steel slag in EDTA-NaOH solution have been investigated and the relationship between extraction characteristics and cementitious activity expressed as mortar strength has been analyzed. Results show that the linear relationship between the quantity extracted from steel slag and the mortar compressive strength is significant. According to the analysis results of mineral composition and microscopic morphologies, EDTA-NaOH solution can selectively extract the silicate and aluminate minerals of steel slag, which could be used as a rapid evaluation method of steel slag cementitious activity.

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Key concepts: Cementitious, Materials science, Mortar, Slag (welding), Extraction (chemistry), Compressive strength, Metallurgy, Aluminate