Low-Temperature Calcination of Belite-Calcium Sulphoaluminate Cement Clinker and the Hydration Process: Fid-Bau Portal

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Low-Temperature Calcination of Belite-Calcium Sulphoaluminate Cement Clinker and the Hydration Process

Guo, Wei / Qiu, Jialin / Chen, Qin / Wang, Xiao / Yang, Tao

To reduce the calcination temperature of belite ( $β - C_{2} S$ )-calcium sulphoaluminate ( $C_{4} A_{3} $$ ) cement clinker, hydrothermal curing was applied to mixed raw materials before calcination. The influences of calcination temperature on the mineralogical composition of cement clinker were investigated, and the optimum $β - C_{2} S / C_{4} A_{3} $$ ratio was deduced. The phase and microstructure evolution of the hydrated paste were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The compressive strength development was also tested. The results showed that after hydrothermal curing at 95°C, the belite-calcium sulphoaluminate cement clinker can be prepared with a low-temperature calcination of 1,200°C. When the $β - C_{2} S / C_{4} A_{3} $$ ratio reached 50%/50%, the cement pastes had the highest 3- and 28-day compressive strengths of 37.34 and 62.94 MPa, respectively. The main hydration product formed in the cement paste was ettringite.

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Low-Temperature Calcination of Belite-Calcium Sulphoaluminate Cement Clinker and the Hydration Process

Guo, Wei / Qiu, Jialin / Chen, Qin / Wang, Xiao / Yang, Tao

To reduce the calcination temperature of belite ( $β - C_{2} S$ )-calcium sulphoaluminate ( $C_{4} A_{3} $$ ) cement clinker, hydrothermal curing was applied to mixed raw materials before calcination. The influences of calcination temperature on the mineralogical composition of cement clinker were investigated, and the optimum $β - C_{2} S / C_{4} A_{3} $$ ratio was deduced. The phase and microstructure evolution of the hydrated paste were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The compressive strength development was also tested. The results showed that after hydrothermal curing at 95°C, the belite-calcium sulphoaluminate cement clinker can be prepared with a low-temperature calcination of 1,200°C. When the $β - C_{2} S / C_{4} A_{3} $$ ratio reached 50%/50%, the cement pastes had the highest 3- and 28-day compressive strengths of 37.34 and 62.94 MPa, respectively. The main hydration product formed in the cement paste was ettringite.

Low-Temperature Calcination of Belite-Calcium Sulphoaluminate Cement Clinker and the Hydration Process

Guo, Wei / Qiu, Jialin / Chen, Qin / Wang, Xiao / Yang, Tao

To reduce the calcination temperature of belite ( $β - C_{2} S$ )-calcium sulphoaluminate ( $C_{4} A_{3} $$ ) cement clinker, hydrothermal curing was applied to mixed raw materials before calcination. The influences of calcination temperature on the mineralogical composition of cement clinker were investigated, and the optimum $β - C_{2} S / C_{4} A_{3} $$ ratio was deduced. The phase and microstructure evolution of the hydrated paste were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The compressive strength development was also tested. The results showed that after hydrothermal curing at 95°C, the belite-calcium sulphoaluminate cement clinker can be prepared with a low-temperature calcination of 1,200°C. When the $β - C_{2} S / C_{4} A_{3} $$ ratio reached 50%/50%, the cement pastes had the highest 3- and 28-day compressive strengths of 37.34 and 62.94 MPa, respectively. The main hydration product formed in the cement paste was ettringite.

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Title:

Low-Temperature Calcination of Belite-Calcium Sulphoaluminate Cement Clinker and the Hydration Process

Contributors:

Guo, Wei (author) / Qiu, Jialin (author) / Chen, Qin (author) / Wang, Xiao (author) / Yang, Tao (author)

Published in:

Journal of Materials in Civil Engineering ; 33

Publication date:

2021-09-27

ISSN:

0899-1561 , 1943-5533

DOI:

https://doi.org/10.1061/(ASCE)MT.1943-5533.0003984

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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