Effect of Temperature Rising Inhibitor on Hydration of Ferroaluminate Cement

doi:10.16552/j.cnki.issn1001-1625.2025.1070

Abstract

Abstract:

In order to solve the problems of concentrated heat release and rapid setting of ferroaluminate cement-based materials， the influence of temperature rising inhibitor on the hydration process and physical-mechanical properties of ferroaluminate cement was investigated through tests of fluidity， setting time， compressive strength， hydration heat and hydration products analysis. The results show that the addition of temperature rising inhibitor improves the fluidity of cement mortar and prolongs the setting time of cement paste. When the content of temperature rising inhibitor is 2.0%（mass fraction）， the initial and final setting time of cement paste are 73 and 106 min respectively， which are 49 and 68 min longer than those of the sample without inhibitor. When temperature rising inhibitor is added， the compressive strength of the specimen decreases obviously at the early age of 6 h. Compared with the sample without inhibitor， the compressive strength decreases by 38.14% when the content of the inhibitor is 2.0%， and then the effect of the inhibitor gradually weakens with increasing age， and hydration gradually recovers. At the same time， the addition of inhibitor delays the time of the exothermic peak of cement hydration. When the content of inhibitor is 2.0%， compared with the sample without inhibitor， the second exothermic peak value increases by 66.93%， the time of the peak is delayed by 2.75 h， the third exothermic peak value decreases by 20.38%， and its appearance time is delayed by 9.28 h.

Key words: ferroaluminate cement, temperature rising inhibitor, hydration heat, fluidity, setting time, compressive strength, hydration product

CLC Number:

TU528

ZHU Jiajun, LIAO Yishun, GUO Junping, LI Wenhua, LI Lingyun. Effect of Temperature Rising Inhibitor on Hydration of Ferroaluminate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(5): 1483-1490.

Figures/Tables 11

Table 1 Chemical composition of cement

Composition	CaO	Al₂O₃	SO₃	Fe₂O₃	SiO₂	TiO₂	MgO	Na₂O	K₂O	Other
Mass fraction/%	49.60	17.98	16.92	7.15	5.39	1.45	0.77	0.16	0.14	0.44

Fig.1 XRD pattern of FAC

Fig.2 FTIR spectrum of TRI

Fig.3 Effect of TRI on fluidity of FAC mortar

Fig.4 Effect of TRI on setting time of FAC

Fig.5 Effect of TRI on hydration heat of FAC

Table 2 Effect of TRI on hydration heat release peak of FAC

Sample	Time of the second peak/h	Peak value of the second peak/（mW·g^-1）	Time of the third peak/h	Peak value of the third peak/（mW·g^-1）	Second peak time interval/h	Third peak time interval/h
Control	4.08	8.92	20.33	2.60	—	—
T05	4.44	11.84	25.00	2.24	0.36	4.67
T10	5.17	13.34	27.38	2.16	1.09	7.05
T15	5.99	13.88	28.82	1.98	1.91	8.49
T20	6.83	14.89	29.61	2.07	2.75	9.28

Fig.6 Effect of TRI on compressive strength of FAC mortar

Fig.7 Effect of TRI on flexural strength of FAC mortar

Fig.8 XRD patterns of FAC with different TRI content

Fig.9 FTIR spectra of FAC with different TRI content

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