Influence of Ferrite Phase Content on Erosion Resistance of Ferrite-Aluminate Cement

doi:10.16552/j.cnki.issn1001-1625.2026.0143

Abstract

Abstract:

Ferrite-aluminate cement holds significant application prospects in marine engineering due to its low clinkering temperature， reduced carbon emissions， and excellent erosion resistance. In this study， four cement samples with different ferrite phase content were prepared. Immersion tests in chloride and sulfate solutions were conducted， and the influence of ferrite phase content on erosion resistance was systematically investigated using analytical techniques such as XRD， TG， MIP， and SEM. The results indicate that as the ferrite phase content increases， the cement exhibits a lower chloride diffusion coefficient， enhanced chloride-binding capacity， and significantly improved sulfate resistance. When the proportions of the main minerals C₄A₃S， C₂S， and ferrite phase all approach 30%， the cement demonstrates optimal erosion resistance. Its dense structure and low porosity， along with the synergistic effects of ettringite， ferric gel， and aluminate gel in the hydration products， effectively impede ion penetration and enhance durability.

Key words: ferrite-aluminate cement, ferrite phase, chloride salt erosion, sulfate salt erosion, erosion resistance mechanism, durability

CLC Number:

TQ172.72

LI Hongxuan, WANG Yali, PEI Tianrui, WANG Zhiyong, QI Dongyou. Influence of Ferrite Phase Content on Erosion Resistance of Ferrite-Aluminate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(8): 2600-2611.

Figures/Tables 15

Table 1 Main chemical composition of raw materials

Raw material	Mass fraction/%
Raw material	Loss	SiO₂	Al₂O₃	CaO	Fe₂O₃	MgO	SO₃	TiO₂
Limestone	41.81	1.17	1.17	54.42	0.48	0.46	0.08	0.11
Desulfurized gypsum	0.03	2.25	0.53	37.37	0.29	0.25	57.11	0.07
Bauxite	14.41	10.71	61.59	4.42	2.16	0.48	1.49	3.20
Fly ash	1.29	49.06	38.46	3.10	3.46	0.73	0.67	1.37
Iron ore	7.59	38.17	8.77	1.47	41.28	0.67	0.29	0.25
Anhydrite	0.04	1.46	0.45	40.57	0.05	3.24	53.69	0.02

Fig.1 XRD patterns of four groups of FAC clinker minerals

Table 2 Raw material proportion for four groups of FAC clinker

Group	Mass fraction/%
Group	Limestone	Desulfurized gypsum	Bauxite	Fly ash	Iron ore
A	70.24	5.60	10.66	9.26	4.24
B	68.61	5.55	14.18	5.20	6.46
C	67.00	5.50	17.69	1.14	8.67
D	61.48	5.45	21.16	1.03	10.88

Table 3 Mass fraction of different minerals in four groups of FAC clinker

Group	Mass fraction/%
Group	C₄A₃S	C₂S	C₄AF	C₃A	Amorphous
A	17.30	38.65	13.93	15.17	14.95
B	18.39	32.76	17.67	15.82	15.36
C	21.98	31.24	22.48	11.91	12.39
D	29.74	29.53	28.17	1.39	11.17

Fig.2 Cl- diffusion coefficient of four groups of FAC

Fig.3 Cl- binding capacity of four groups of FAC

Fig.4 Changes in hydration products of FAC with different ferrite phase content after Cl- erosion

Fig.5 Pore size distribution of FAC after Cl- erosion

Fig.6 SEM images of FAC after Cl- erosion

Fig.7 Sulfate resistance coefficient of FAC

Fig.8 Expansion rate during sulfate erosion process of FAC

Fig.9 Changes in hydration products of FAC with different ferrite phase content after sulfate erosion

Fig.10 Pore size distribution of FAC after sulfate erosion

Fig.11 SEM images of FAC after sulfate erosion

Fig.12 Schematic diagram of FAC erosion resistance mechanism

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