Early carbonation behaviour of no-clinker steel slag binder
Source abstract
Abstract
The use of steel slag as a no-clinker binder was studied. Steel slag was activated by CO2 to develop strength as a cementing material for building product applications. The performance of slag paste compacts formed by low water to slag ratio was characterised by X-ray diffraction analysis, thermal analysis and field emission scanning electron microscopy analysis affiliated with energy dispersive spectrometer analysis. Results showed that the mineral components of steel slag, such as calcium hydroxide and calcium silicates (C3S and C2S), were CO2 reactive. The reaction products were strength contributing. Immediate carbonation of 2 h was capable of developing rapid early strength while promoting subsequent hydration. The reaction products of steel slag after carbonation and hydration were the combination of poorly crystalline CaCO3 intermingled with C-S-H gel, which was the characteristic of the early hardening structure of no-clinker steel slag.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · CO2 Sequestration and Geologic Interactions · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Professor, State Key Laboratory of Water Resources and Hydropower Engineering Science, Institute of New Materials for Hydraulic Structures, Wuhan University, China
PhD Candidate, College of Water Resources and Hydroelectric Engineering, Wuhan University, China
Associate Professor, Department of Civil Engineering, McGill University, Canada
Postgraduate Student, College of Water Resources and Hydroelectric Engineering, Wuhan University, China
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