Experimental Study on Compound Binding Material of Alkali Activated Metakaolin and Ground Granulated Blast Furnace Slag

Abstract:

Compound binding material was prepared by the alkali activation of metakaolin and ground granulated blast furnace slag. Hydration product components, microstructure and mechanical properties of the hardened paste were investigated by IR, XRD, SEM, MIP, and compressive strength measurement. Results indicated that hydration products included C-S-H and geopolymer, and both of them were amorphous although there were differences in their structure and morphology. When the dosage of slag was less than 50%, the compressive strength of hardened paste increased as the dosage increased, which was mainly because C-S-H produced by the reaction of GGBFS and alkali filled void in geopolymer phase, and part of unreacted slag particles acting as microaggregate to prevent from extension of microcrack in the hardened paste, so the porosity of hardened paste decreased and compressive strength increased.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 1275-1279
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.1275
• Online since: July 2011
• Authors: Yong Jia He, Lin Nu Lu, Shu Guang Hu
• Keywords: Alkali Activate, Compound Binding Material, Ground Granulated Blast Furnace Slag (GGBFS), Metakaolin (MK)

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