激发剂对氟石膏适应性的研究

Study on the adaptability of activator to fluorogypsum

氟石膏在自然环境中水化进程缓慢,历时2年结晶水含量为17.25%,水化率为82%。KA(lSO4)2.12H2O和K2SO4能加快氟石膏的水化进程,随添加量增加和水化时间延长,试样的水化率均出现不同程度增大。早强快硬硫铝酸盐水泥能有效提高氟石膏基材料的绝干抗压强度,随着水泥掺量增加,绝干抗压强度增大;当掺量为20%时,绝干抗压强度为14.5 MPa;KA(lSO4)2.12H2O对氟石膏基材料有良好的适应性,当掺2.78%KA(lSO4)2.12H2O和20%硫铝酸盐水泥时,其绝干抗压强度为22.4 MPa。

The hydration process of fluorogypsum was slow in natural environment. The crystal water content is 17.25% and the hydration rate was obtained 82% after two years. It was found that,in the presence of activators KAI（SO4）2＊12H2O and K2S04, the hydration process of fluorogypsum to gypsum is enhanced considerably. With the increase of dosage ratio and extension of hy- dration time, the hydration rate of the specimens increase in different degree. High early-strength and quick hardening calcium sulfoaluminate cement could improve the dry compression strength of fluorogypsum-based material. The dry compression strength has been obtained 14.5 MPa,when the content of calcium sulfoaluminate cement was added in the range of 20%. KAI（SO4）2＊12H20 has good adaptability to the fluorogypsum-based material. The results show that the dry compression strength of fluorogypsum has been obtained 22.4 MPa when the KA1 （S04）2＊ 12H2O content was 2.78% and calcium sulfoaluminate cement content was 20%.