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MICROSTRUCTURE AND PERFORMANCES OF BELITE–CALCIUM BARIUM SULPHOALUMINATE CEMENT

Cheng Xin

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Abstract

Belite–calcium barium sulphoaluminate cement is a new type of cementitious material. By combining calcium barium sul- phoaliminate with a belite mineral system. The influences of excessive SO3 and BaO on the performances of cement are studied. The results show that the optimal excessive mass fraction of SO3 and BaO is 50% and 80%, respectively in the clinker and the compressive strength of the cement at 3 d and 28 d can reach 27.0 MPa and 85.6 MPa. The additions of SO3 and BaO are benefit to increase the content of C2.75B1.25A3S , activate the belite and promote the formation of alite at low temperature.

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What this paper is about

Belite–calcium barium sulphoaluminate cement is a new type of cementitious material. By combining calcium barium sul- phoaliminate with a belite mineral system. The influences of excessive SO3 and BaO on the performances of cement are studied. The results show that the optimal excessive mass fraction of SO3 and BaO is 50% and 80%, respectively in the clinker and the compressive strength of the cement at 3 d and 28 d can reach 27.0 MPa and 85.6 MPa. The additions of SO3 and BaO are benefit to increase the content of C2.75B1.25A3S , activate the belite and promote the formation of alite at low temperature.

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Available abstract

Belite–calcium barium sulphoaluminate cement is a new type of cementitious material. By combining calcium barium sul- phoaliminate with a belite mineral system. The influences of excessive SO3 and BaO on the performances of cement are studied. The results show that the optimal excessive mass fraction of SO3 and BaO is 50% and 80%, respectively in the clinker and the compressive strength of the cement at 3 d and 28 d can reach 27.0 MPa and 85.6 MPa. The additions of SO3 and BaO are benefit to increase the content of C2.75B1.25A3S , activate the belite and promote the formation of alite at low temperature.

Key concepts: Belite, Alite, Cement, Materials science, Barium, Clinker (cement), Cementitious, Microstructure

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