高贝利特水泥早期水化活性的激发研究

关键字：高贝,利特,水泥,早期,水化,活,性的,激发,研究,

（成都理工大学 工程技术学院，四川 乐山  614000）

摘要：利用机械粉磨和早强剂激发高贝利特水泥（HBC）早期水化活性，研究细度和早强剂对HBC早期强度的影响，并结合水化热分析和SEM等手段，得出HBC最佳细度和最优早强剂掺量。结果表明：HBC中位径（D50）为15.57 μm左右时，有利于早期强度发挥，并且生产工艺易于控制；单掺TEA、晶胚和Fe2（SO4）3在适宜掺量时能够提高HBC的早期强度；当采用2%Fe2（SO4）3、0.03%TEA和3%晶胚复掺时，能够显著提高HBC的早期水化活性。粉磨较细的HBC在掺入早强剂后，早期水化活性激发不明显，而且对后期强度不利。

关键词：高贝利特水泥；细度；早强剂；抗压强度；水化热；水化活性

中图分类号：TU528.04；TQ172.7        文献标识码：A        文章编号：1001-702X（2019）08-0060-04

 

Excitation on early hydration activity of high belite cement

XIA Yanqing，SHI Zhanzhan

（The Engineering & Technical College of Chengdu University of Technology，Leshan 614000，China）

Abstract：Using mechanical grinding and hardening accelerator to stimulate the early hydration activity of HBC，the influence of fineness and hardening accelerator on the early intensity of HBC was studied，and the optimum fineness and hardening accelerator dosage were obtained by means of hydration thermal analysis and SEM. The results show that when the HBC median diameter（D50） is about 15.57 μm，it is beneficial to the early strength and easy to control in the production process. The early strength of HBC can be improved by TEA，crystal embryo and Fe2（SO4）3 when the dosage is suitable，and when 2% Fe2（SO4）3 is mixed with

0.03% TEA and 3% crystal embryo，the early hydration activity of HBC can be significantly improved. Moreover，The early hydration activity of HBC with fine grinding is not obvious after the addition of hardening accelerator，and it is unfavorable to the later strength development.

Key words：high belite cement，fineness，hardening accelerator，compressive strength，hydration heat，hydration activity