DataVXAdvances in Cement ResearchPaper
journal article·2021-04

Thermal activation mechanism and pozzolanic activity characteristics of coal flotation tailing

Dongxue Liu, Yang Huang, Junyang Hu, Qiming Feng, Junhui Xiao

Advances in Cement Research· Volume 33· Issue 4
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Source abstract

Abstract

Coal flotation tailings (CFT) was calcined to be used as a supplementary cementing material. CFT and its calcined products were characterised by thermogravimetric analysis (TGA), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy. The pozzolanic activity of the calcined products was analysed by the strength activity index. The hydration products of blended cement were characterised by TGA, XRD and scanning electron microscopy to explain the influence of calcined products on cement hydration. The results showed that calcination treatment destroyed the structure of illite–kaolinite mixed-layer clays from CFT and enhance pozzolanic activity. Moreover, the highest pozzolanic reactivity was obtained at 850°C because the recrystallisation effect increased chemical stability above 900°C. The impact of calcined CFT on the hydration of cement in a blended system was the combination of micro-aggregate effects and the pozzolanic reaction. The experimental results indicated that calcined products of CFT had good pozzolanic activity, which provided the feasibility of large-scale recycling utilisation of CFT.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Tailings Management and Properties · Concrete and Cement Materials Research · Minerals Flotation and Separation Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Masters student, School of Environment and Resources, Southwest University of Science and Technology Sichuan Mianyang, P. R. China

Key Laboratory of Solid Waste Treatment and Recycling, Ministry of Education, Sichuan Mianyang, P. R. China

Lecturer, School of Environment and Resources, Southwest University of Science and Technology Sichuan Mianyang, P. R. China (corresponding author: )

Sichuan Engineering Lab of Non-metallic Mineral Powder Modification and High-value Utilization, Sichuan Mianyang, P. R. China

Clerk, Environmental Protection Bureau, Sichuan Guangyuan Cangxi, P. R. China

Professor, School of Environment and Resources, Southwest University of Science and Technology Sichuan Mianyang, P. R. China

Associate professor, School of Environment and Resources, Southwest University of Science and Technology Sichuan Mianyang, P. R. China

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