蒸养静停时间对标养水泥石氯离子固化性能的影响

发布时间：2018-05-19 07:41

本文选题：蒸养 + 静停时间　；参考：《硅酸盐通报》2017年07期

【摘要】：采用吸附平衡方法研究了蒸养制度参数中静停时间对水泥石氯离子固化性能影响,讨论了蒸养结束后,该性能随后续标准养护时间变化特征。采用XRD和DTA分析水泥石水化产物物相变化特征与水泥石氯离子固化性能变化之间的关系。结果表明,蒸养对水泥石氯离子固化性能有较大的影响。水泥石中的固化态氯离子数量随着静停时间增加,先增加,后减少。当后续标养时间为28 d时,蒸养水泥石中的固化态氯离子数量要明显低于标养试样;但当后续标养时间达到90 d时,其出现明显增加,甚至高于标养试样。静停时间为4~6 h时,水泥石氯离子固化性能最优。蒸养水泥石中Friedel盐早期(28 d)形成数量较少,但随着后续养护时间的增加,其数量会持续增加。
[Abstract]:The influence of static stop time on the curing property of cement stone chloride ion was studied by adsorption equilibrium method, and the change characteristics of standard curing time were discussed. XRD and DTA were used to analyze the relationship between the phase change of hydration products of cement stone and the solidification property of chloride ion of cement stone. The results show that the curing property of cement stone is greatly affected by steaming. The number of solidified chloride ions in cement stone increases firstly and then decreases with the increase of static stop time. The amount of solidified chloride ions in steaming cement paste was significantly lower than that of standard sample when the follow-up standard time was 28 days, but when the follow-up standard time reached 90 days, the amount of solidified chlorine ion in steaming cement stone increased obviously, even higher than that of standard sample. When the static stop time is 4 ~ 6 h, the solidification property of chloride ion of cement stone is the best. The amount of Friedel salt formed in the early stage of 28 days in steaming cement stone is relatively small, but with the increase of subsequent curing time, the amount of Friedel salt will continue to increase.
【作者单位】：浙江大学宁波理工学院;
【基金】：“十二五”国家科技支撑项目(2015BAL02B03) 浙江省自然科学基金项目(LY17E080072,LY16E090007) 宁波市科学基金项目(2016A610220)
【分类号】：TU528

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