【摘要】 以Ca(OH)2、SiO2化学纯为原料,分别掺入不同质量分数的Ni2O3制备不同晶型的C3S相,运用化学分析、XRD、DTA、SEM、水化热测试方法,研究了掺Ni2O3后C3S矿物相形成、晶型及其水化特性变化趋势。结果表明,Ni2O3促进C3S形成效应一般,掺量大于2%后促进效应增强;且掺量大于2%时,Ni2O3可稳定单斜型C3S存在;含Ni的C3S具有一定的活性点或活性面,水化后会导致液相呈现较高的Ca2+浓度,轻微地加快了C3S水化速率,且水化产物颗粒较小,分散度和水化程度高。更多还原

【Abstract】 Such chemically pure Ca(OH)2,SiO2 as raw materials were mixed with different mass fraction of Ni2O3 to prepare different crystal composition of C3S,with the use of chemical analysis,XRD,DTA,SEM,heat of hydration test method to research the phase formation,crystal structure and hydration properties of C3S mineral doped Ni2O3.The results show that: the effect of promoting the formation of C3S doped with Ni2O3 was general,when do-sage was greater than 2%,increased step by step;at the same time,monoclinic type C3S can be stabled by Ni2O3;there were some active sites and surface in C3S doped with Ni,high Ca2+ concentration was present in liquid because of the reaction,C3S hydration was accelerated at a slight extent of accelerated rate,and with hydration products of smaller particles,high degree of dispersion and hydration.更多还原