Hydration mechanism of a cementitious material prepared with Si-Mn slag

Xu-fang Zhang; Wen Ni; Jun-yu Wu; Li-ping Zhu

doi:10.1007/s12613-011-0428-7

Volume 18 Issue 2

Apr. 2011

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Abstract

International Journal of Minerals, Metallurgy and Materials > 2011 > 18(2): 234-239. > DOI: 10.1007/s12613-011-0428-7

Xu-fang Zhang, Wen Ni, Jun-yu Wu, and Li-ping Zhu, Hydration mechanism of a cementitious material prepared with Si-Mn slag, Int. J. Miner. Metall. Mater., 18(2011), No. 2, pp.234-239. https://dx.doi.org/10.1007/s12613-011-0428-7

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Hydration mechanism of a cementitious material prepared with Si-Mn slag

Xu-fang Zhang^1,2),
Wen Ni^1), ,,
Jun-yu Wu³⁾ and
Li-ping Zhu¹⁾

Author Affilications

Key Laboratory of the Minstry of Education of China for High-Efficient Mining and Safety of Metal Mines Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China
North China University of Water Resources and Electric Power, Zhengzhou, 450011, China
Beijing Dongfangjianyu Institute of Concrete Science and Technology, Beijing, 100190, China

Funds:

This study was financially supported by the National High Technology Research and Development Program (No.2006BAC21B03).

Received: 15 April 2010; Revised: 07 June 2010; Accepted: 16 July 2010; Available Online: 13 June 2021

Graphical Abstract

Abstract

Abstract

A cementitious material was prepared by mixing 80wt% Si-Mn slag powder, 10wt% lime, and 10wt% anhydrite. The compressive strength of mortar samples reaches 51.48 MPa after 28 d curing. The analyses of X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that much ettringite is formed in the sample cured for 3 d, and C-S-H gel increases rapidly during subsequent curing. Nuclear magnetic resonance (NMR) analysis of ²⁹Si and ²⁷Al and infrared spectroscopy (IR) analysis show that aluminum decomposition from tetrahedral network of the slag glass and its subsequent migration and re-combination play an important role in the process of hydration and strength development of the samples.
- slag cement,
- mechanical properties,
- nuclear magnetic resonance (NMR),
- hydration