Research of Cement-Based Grouting Materials of Calcium Aluminate Cement-Gypsum-Lime Ternary System

doi:10.16552/j.cnki.issn1001-1625.2025.0627

Abstract

Abstract:

The formation of metastable phases during calcium aluminate cement （CAC） hydration results in mechanical property instability， which restricts its application in grouting reinforcement engineering. This study proposed a composite system incorporating CAC with gypsum and lime to optimize its hydration behavior and enhanced the mechanical properties and stability of the grouting material. The evolution patterns and mechanisms of hydration product types， contents， and morphology of CAC-gypsum-lime ternary system were revealed through hydration temperature testing， XRD， TG-DTG， and SEM methods. The experimental results indicate that the optimal composition range for achieving early high strength corresponds to 55%<m（CAC）<65%， 5%<m（lime）<15%， m（gypsum）<30%. When maintaining constant CAC dosage within this optimal range， the compressive strength initial increase and then decrease with the reduction of the mass ratio of gypsum and lime. With the reduction of gypsum content， the plate-type dicalcium aluminate hydrate （2CaO·Al₂O₃·8H₂O， C₂AH₈） transitions from a stacked distribution to an interlocked distribution with ettringite crystals， resulting in a decrease in structural compactness， flexural and compressive strength of specimens. These findings provide both theoretical foundations and technical support for the application of calcium aluminate cement-based grouting materials in complex engineering environments.

Key words: grouting material, calcium aluminate cement, gypsum, lime, ternary system, phase transformation

CLC Number:

TU599

YANG Maosheng, ZHANG Haibo. Research of Cement-Based Grouting Materials of Calcium Aluminate Cement-Gypsum-Lime Ternary System[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(1): 246-255.

Figures/Tables 11

References 33

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Material	Mass fraction/%
Material	Al₂O₃	CaO	SiO₂	Fe₂O₃	MgO	SO₃	TiO₂
CAC	54.35	31.76	7.06	1.65	0.70	0.87	1.89
Gypsum	0.23	39.40	2.83	0.03	1.36	54.16	0.60
Lime	1.18	91.72	2.48	0.28	2.44	1.19	—

Material	Mass fraction/%
Material	Al₂O₃	CaO	SiO₂	Fe₂O₃	MgO	SO₃	TiO₂
CAC	54.35	31.76	7.06	1.65	0.70	0.87	1.89
Gypsum	0.23	39.40	2.83	0.03	1.36	54.16	0.60
Lime	1.18	91.72	2.48	0.28	2.44	1.19	—

No.	Mass fraction/%
No.	CAC	Gypsum	Lime
C₅₅A_41.2L_3.8	55	41.2	3.8
C₅₅A_37.5L_7.5	55	37.5	7.5
C₅₅A_33.7L_11.3	55	33.7	11.3
C₅₅A_30.0L_15.0	55	30.0	15.0
C₆₀A_36.7L_3.3	60	36.7	3.3
C₆₀A_33.3L_6.7	60	33.3	6.7
C₆₀A_30.0L_10.0	60	30.0	10.0
C₆₀A_26.7L_13.3	60	26.7	13.3
C₆₅A_32.1L_2.9	65	32.1	2.9
C₆₅A_29.2L_5.8	65	29.2	5.8
C₆₅A_26.2L_8.8	65	26.2	8.8
C₆₅A_23.3L_11.7	65	23.3	11.7

No.	Mass fraction/%
No.	CAC	Gypsum	Lime
C₅₅A_41.2L_3.8	55	41.2	3.8
C₅₅A_37.5L_7.5	55	37.5	7.5
C₅₅A_33.7L_11.3	55	33.7	11.3
C₅₅A_30.0L_15.0	55	30.0	15.0
C₆₀A_36.7L_3.3	60	36.7	3.3
C₆₀A_33.3L_6.7	60	33.3	6.7
C₆₀A_30.0L_10.0	60	30.0	10.0
C₆₀A_26.7L_13.3	60	26.7	13.3
C₆₅A_32.1L_2.9	65	32.1	2.9
C₆₅A_29.2L_5.8	65	29.2	5.8
C₆₅A_26.2L_8.8	65	26.2	8.8
C₆₅A_23.3L_11.7	65	23.3	11.7