One kind of energy saving and high early strength cement can be produced by using bauxite of poor quality which is refuse before. Through a series of experiments proper chemical compositions of the cement are obtained...One kind of energy saving and high early strength cement can be produced by using bauxite of poor quality which is refuse before. Through a series of experiments proper chemical compositions of the cement are obtained, and the cement clinker is sintered at a low temperature (1250℃) by the use of the bauxite to the utmost limit. The results show, the cement not only has high early strengths but also has a good characteristic of resisting corrosion by sulphate. So it will be of great practical use. The hydraulic properties of C_4 AF are always problematical, it is studied again in this paper, showing that C_kAF has good hydraulic properties exactly; Cr^(3+), Ni^(3+) and Ti^(4+) can promote the formation of C_4AF and increase its early strengths; CaSO_4·2H_20 can also improve its 3 days' strength but retard its hydration rate espe- cially in early ages.展开更多
文摘One kind of energy saving and high early strength cement can be produced by using bauxite of poor quality which is refuse before. Through a series of experiments proper chemical compositions of the cement are obtained, and the cement clinker is sintered at a low temperature (1250℃) by the use of the bauxite to the utmost limit. The results show, the cement not only has high early strengths but also has a good characteristic of resisting corrosion by sulphate. So it will be of great practical use. The hydraulic properties of C_4 AF are always problematical, it is studied again in this paper, showing that C_kAF has good hydraulic properties exactly; Cr^(3+), Ni^(3+) and Ti^(4+) can promote the formation of C_4AF and increase its early strengths; CaSO_4·2H_20 can also improve its 3 days' strength but retard its hydration rate espe- cially in early ages.
