SO3和H3BO3对高镁熟料中方镁石含量和C2S晶型的影响

关键字：高镁熟料,方镁石,C2S,SO3

（西安建筑科技大学 材料与矿资学院，陕西 西安  710055）
 

    摘要：高镁熟料的生产具有补偿混凝土收缩和缓解石灰石资源日益匮乏的作用。研究了在水泥生料中外掺SO3对熟料中方镁石含量的影响，同时研究了SO3及H3BO3单独和共同掺杂对C2S晶型和水化反应的影响。结果表明，SO3的掺入有利于减少高镁熟料中方镁石的含量。H3BO3掺杂能够稳定β型C2S，形成Ca7MgSi4O16等晶体矿物，掺入SO3后会导致Ca7MgSi4O16中的MgO分解出来，形成方镁石。当SO3和H3BO3同时掺杂稳定β型C2S时，SO3内掺4.0%，H3BO3内掺0.5%时效果最佳。
    关键词：高镁熟料；方镁石；C2S；SO3
    中图分类号：TU528.04；TQ172.4        文献标识码：A        文章编号：1001-702X（2017）03-0101-05

Influence of SO3 and H3BO3 on periclase content and polymorphisms of C2S in high magnesium content clinker
ZHANG Qiongqiong，SONG Qiang，FENG Xuchao
（College of Materials and Mineral Resources，Xi'an University of Architecture and Technology，Xi'an 710055，China）

    Abstract：High magnesium clinker plays an important role in compensating concrete shrinkage and mitigating limestone resources shortage. In this paper，discussed the influence of SO3 on periclase content and studied the effect of SO3 and H3BO3 on polymorphisms and hydration reaction of C2S in high magnesium content clinker. The results showed that the incorporation of SO3 could effectively reduce the periclase content in high magnesium clinker，the incorporation of H3BO3 could stabilize β-C2S，formed Ca7MgSi4O16 the incorporation of SO3，could lead MgO decomposed from Ca7MgSi4O16 to form periclase. When SO3 and H3BO3 simultaneously mixed with stabilized β-C2S，the SO3 content was 4%，the H3BO3 content was 0.5%，the result is optimum.
    Key words：high magnesium clinker，periclase，C2S，SO3