Properties of the reaction products of alkali-activated electric furnace nickel slag

WANG Qiang; YANG Jun; WANG Dengquan

doi:10.16511/j.cnki.qhdxxb.2018.22.028

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Journal of Tsinghua University(Science and Technology) ›› 2018, Vol. 58 ›› Issue (6) : 593-597,602. DOI: 10.16511/j.cnki.qhdxxb.2018.22.028

CIVIL ENGINEERING

Properties of the reaction products of alkali-activated electric furnace nickel slag

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Abstract

Electric furnace nickel slag was alkali-activated by sodium hydroxide and water glass to study the reaction product properties with measurements of reaction heat of the binder, the mortar compressive strength, and the morphology and structure of the reaction products. The results show that the mortar compressive strength is the greatest for a sodium hydroxide content of 5%. The optimum modulus of the alkali-activated electric furnace nickel slag is 0.5 for a water glass content of 10%. The high alkalinity improves the initial strength, while the silicate ions improve the later strength. The reaction products are amorphous regardless of the type of alkali used and are denser with sodium hydroxide. The reaction products have more polymerized silica-oxygen connections than the raw materials. No new aluminum-oxygen configurations are found.

Key words

electric furnace nickel slag / alkali-activation / reaction product / compressive strength / microstructure

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WANG Qiang, YANG Jun, WANG Dengquan. Properties of the reaction products of alkali-activated electric furnace nickel slag[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(6): 593-597,602 https://doi.org/10.16511/j.cnki.qhdxxb.2018.22.028

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