Controlling the soundness of Portland cement clinker synthesized with solid wastes based on phase transition of MgNiO2

Yanjie Tang; Liang Zhao; Bo Li; Wei Chen

doi:10.1016/j.cemconres.2022.106832

Controlling the soundness of Portland cement clinker synthesized with solid wastes based on phase transition of MgNiO₂

Yanjie Tang
, Liang Zhao
, Bo Li (Corresponding author)
, Wei Chen

Research output: Contribution to journal › Article › Academic › peer-review

41 Citations (Scopus)

Abstract

A Portland cement clinker containing high content of ferrite phase (>18%) is synthesized with high fractions (60 mass%) of solid wastes, including steel slag, copper tailing, coal gangue and phosphate tailing. Controlling the soundness of clinker caused by the MgO (about 9% in mass) is the key challenge. Adding NiO into the raw meal of clinker controls its soundness via the formation of MgNiO₂ with free MgO, showing little effect on the hydration and strength development of cement synthesized with solid wastes. The cement satisfy the 42.5 grade according to the Chinese standard GB 175–2007.

Original language	English
Article number	106832
Number of pages	11
Journal	Cement and Concrete Research
Volume	157
DOIs	https://doi.org/10.1016/j.cemconres.2022.106832
Publication status	Published - Jul 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

Funding

This research has been financially supported by the National Key Research and Development Plan of China (project 2019YFC1904902 ), National Natural Science Foundation of China (project 52102031 ), the Fundamental Research Funds for the Central Universities (WUT: 2021IVA014B ). Yunyun Zou from Shiyanjia Lab ( www.shiyanjia.com ) are greatly appreciated for SEM & elemental mapping and access to Factsage.

Keywords

Clinkerization
MgNiO
Periclase
Solid wastes
Soundness

Access to Document

10.1016/j.cemconres.2022.106832

Cite this

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title = "Controlling the soundness of Portland cement clinker synthesized with solid wastes based on phase transition of MgNiO2",

abstract = "A Portland cement clinker containing high content of ferrite phase (>18\%) is synthesized with high fractions (60 mass\%) of solid wastes, including steel slag, copper tailing, coal gangue and phosphate tailing. Controlling the soundness of clinker caused by the MgO (about 9\% in mass) is the key challenge. Adding NiO into the raw meal of clinker controls its soundness via the formation of MgNiO2 with free MgO, showing little effect on the hydration and strength development of cement synthesized with solid wastes. The cement satisfy the 42.5 grade according to the Chinese standard GB 175{\textendash}2007.",

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AU - Tang, Yanjie

AU - Zhao, Liang

AU - Li, Bo

AU - Chen, Wei

PY - 2022/7

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AB - A Portland cement clinker containing high content of ferrite phase (>18%) is synthesized with high fractions (60 mass%) of solid wastes, including steel slag, copper tailing, coal gangue and phosphate tailing. Controlling the soundness of clinker caused by the MgO (about 9% in mass) is the key challenge. Adding NiO into the raw meal of clinker controls its soundness via the formation of MgNiO2 with free MgO, showing little effect on the hydration and strength development of cement synthesized with solid wastes. The cement satisfy the 42.5 grade according to the Chinese standard GB 175–2007.

KW - Clinkerization

KW - MgNiO

KW - Periclase

KW - Solid wastes

KW - Soundness

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DO - 10.1016/j.cemconres.2022.106832

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JO - Cement and Concrete Research

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