摘要
作者开展了利用低品位铁矾土生产节能、早强水泥的研究,确定了其合理组成,取得了既能在1250℃的较低温度下烧成水泥熟料,又能较多地利用铁矾土的效果。同时研究还表明,该种水泥不仅早期强度较高,而且抗硫酸盐性能较好,具有良好的实用价值。针对C_4AF是否具有胶凝性这一有争议的问题,本文研究表明,烧结法所制得的C_4AF确实具有较好的胶凝性能;Cr^(a+)、Ni^(a+)、Ti^(4+)既可促进C_4AF的形成,又能提高其早期强度;二水石膏虽然能提高C_4AF的早期强度,但降低了其水化速率,特别是早期水化速率。C_4AF的性能受实验方法、实验条件影响较大,作者认为这可能是历来各家结果不一致的主要原因。
One kind of energy saving and high early strength cement could be prod-uced by using bauxite of poor quality which was refuse before. After a seriesof expeximents proper chemical compositions of the cement were obtained, andthe cement clinker was clinkered at low temperature (1250℃) and with the usdof the bauxite to the utmost limit. the result shows, the cement ont only hashigh early strength but also has a good characteristic of resisting corrosionby sulfate. So it will be of great practical use. the hydrauliccproperties ofC_4AF are always problematical, it was studied againin this paper, showingthat C_4AF has good hydraulic properties exactly; Cr^(3+), Ni^(3+) and Ti^(4+) can ppr-omote the formation of C_4AF and increase its early strength; CaSO_4·2H_2Ocan also improve 3 days, strength but reterds its hydration especially inearly ages.
关键词
水泥
原料
铁矾土
胶凝
综合利用
Cement
Bauxite of poor quality
Utilization
Hydraulic property
