Influence of Iron Phase Modulation on Properties of High-Belite Ferroaluminate Cement

doi:10.16552/j.cnki.issn1001-1625.2025.0314

Abstract

Abstract: With the increasing annual production of industrial solid waste in China and the implementation of the "dual-carbon" strategy, the development of high-performance cement that combines solid waste recycling with low-carbon characteristics has become a focus for industry transformation. This study utilized multi-source industrial solid wastes, including steel slag, carbide slag, fly ash, and desulfurization gypsum, to prepare high-belite ferroaluminate cement (HBFAC) through synergistic batching technology. The effects of iron phase content, calcination temperature, and holding time on the mineral composition, mechanical properties, and durability of HBFAC were systematically investigated. The results indicate that the optimal calcination parameters for HBFAC clinker are a temperature range of 1 275~1 325 ℃ and a holding time of 30 min. Under these conditions, the iron phase (15%~25%, mass fraction) stabilizes the crystal structure of ye'elimite (C₄A₃S) and promotes its growth. Compared to ordinary Portland cement and sulfoaluminate cement, HBFAC exhibits superior performance in both early-age strength development and long-term strength gain. HBFAC in 5% (mass fraction) Na₂SO₄ solution shows excellent sulfate resistance, the corrosion resistance coefficient all exceeding 1. When calcined at 1 275 ℃ with 25% iron phase content, HBFAC achieves a remarkable 90 d corrosion resistance coefficient of 1.522. The sulfate resistance mechanism is attributed to the synergistic effect of ettringite (AFt) and ferro-aluminum gel induced by the iron phase, which fills pores and forms a dense structure, effectively blocking SO₄^2-attack. This study provides a theoretical foundation for the application of industrial solid waste-based HBFAC in harsh environments (e.g., marine engineering, saline soils), achieving the dual objectives of solid waste utilization and high-performance material development.

Key words: multi-source solid waste, high-belite ferroaluminate cement, iron phase, calcination temperature, mineral composition adjustment, durability

CLC Number:

TQ172

LI Xiangguo, SHI Xiangqin, AN Wandong, GONG Zhixiong, ZHANG Chengshan, LYU Yang. Influence of Iron Phase Modulation on Properties of High-Belite Ferroaluminate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(9): 3127-3136.

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