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首页 > 过刊浏览>2023年第26卷第5期 >538-546. DOI:10.3969/j.issn.1007-9629.2023.05.012
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羟丙基甲基纤维素对硫铝酸盐水泥水化的影响
作者:
作者单位:

1.同济大学 先进土木工程材料教育部重点实验室，上海 201804;2.同济大学 材料科学与工程学院，上海 201804

作者简介:

王 茹（1975—），女，辽宁昌图人，同济大学教授，博士生导师，博士.E-mail： ruwang@tongji.edu.cn

通讯作者:

王 茹（1975—），女，辽宁昌图人，同济大学教授，博士生导师，博士.E-mail： ruwang@tongji.edu.cn

中图分类号:

TU528.41

基金项目:

国家自然科学基金资助项目（51872203）；中德科学中心资助项目（GZ 1290）


Effect of Hydroxypropyl Methyl Cellulose on Hydration of Calcium Sulfoaluminate Cement
Author:
Affiliation:

1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education，Tongji University，Shanghai 201804，China;2.School of Materials Science and Engineering，Tongji University，Shanghai 201804，China

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    摘要:

    采用X射线衍射分析、热分析、等温量热法和电感耦合等离子光谱法研究了羟丙基甲基纤维素（HPMC）对硫铝酸盐水泥水化的影响，并从孔溶液的性质和组成方面分析了其对水泥水化的影响机理.结果表明：HPMC改变硫铝酸盐水泥的水化放热速率，增加钙矾石（AFt）、单硫型水化硫铝酸钙（AFm）和铝胶（AH3）的含量，促进AH3与CaSO4和Ca（OH）2反应，并促进AFt向AFm转变；HPMC降低硫铝酸盐水泥孔溶液的表面张力，增大孔溶液的pH值，降低孔溶液中SO42-的浓度，增加Ca2+和［Al（OH）4］-的浓度，进而增大AFt和AFm的离子浓度积，有利于水化产物的析出，从而促进水泥水化.

    Abstract:

    The effect of hydroxypropyl methyl cellulose（HPMC） on the hydration of calcium sulfoaluminate cement was studied by X-ray diffraction analysis， thermal analysis， isothermal calorimetry and inductively coupled plasma-optical emission spectroscopy. The influence mechanism of HPMC was analyzed from the perspective of the properties and compositions of the pore solution. The results show that HPMC changes the hydration heat release rate， increases the content of ettringite（AFt）， monosulfate calcium sulfoaluminate hydrate（AFm） and alumina gel（AH3）， promotes the interaction of AH3 with CaSO4 and Ca（OH）2， and promotes the conversion of AFt into AFm. HPMC reduces the surface tension and increases the pH value of the pore solution， reduces the concentration of SO42-， increases the concentration of Ca2+ and ［Al（OH）4］-， thereby increases the ion concentration products of AFt and AFm， and benefits the precipitation of hydration products， hence promotes the cement hydration.

    图1 CSA水泥和HPMC改性水泥的水化放热曲线Fig.1 Hydration heat release curves of CSA cement and HPMC modified cement
    图2 CSA水泥和HPMC改性水泥在不同水化阶段的XRD图谱Fig.2 XRD patterns of CSA cement and HPMC modified cement at different hydration stages
    图3 CSA水泥和HPMC改性水泥在不同水化阶段的TG/DTG曲线Fig.3 TG/DTG curves of CSA cement and HPMC modified cement at different hydration stages
    图4 不同水化阶段CSA水泥和HPMC改性水泥中AFt的含量Fig.4 AFt contents in CSA cement and HPMC modified cement at different hydration stages
    图5 不同水化阶段CSA水泥和HPMC改性水泥中AH3的含量Fig.5 AH3 contents in CSA cement and HPMC modified cement at different hydration stages
    图6 水化2、24 h时CSA水泥和HPMC改性水泥的SEM图片Fig.6 SEM images of CSA cement and HPMC modified cement at hydration time of 2，24 h
    图7 不同水化阶段CSA水泥和HPMC改性水泥孔溶液的pH值Fig.7 pH values of pore solutions of CSA cement and HPMC modified cement at different hydration stages
    图8 不同水化阶段CSA水泥和HPMC改性水泥孔溶液的表面张力Fig.8 Surface tensions of pore solutions of CSA cement and HPMC modified cement at different hydration stages
    表 3 CSA水泥和HPMC改性水泥在不同水化阶段的放热量Table 3 Cumulative heat evolutions of CSA cement and HPMC modified cement at different hydration stages
    表 1 CSA水泥熟料的化学组成Table 1 Chemical composition of CSA cement clinker
    表 4 不同水化阶段CSA水泥和HPMC改性水泥孔溶液中AFt、AFm和AH3的离子浓度积Table 4 Ion concentration products of AFt，AFm and AH3 in pore solutions of CSA cement and HPMC modified cement at different hydration stages
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王茹,周袁宇,刘校荣,刘科.羟丙基甲基纤维素对硫铝酸盐水泥水化的影响[J].建筑材料学报,2023,26(5):538-546

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  • 收稿日期:2022-04-21
  • 最后修改日期:2022-07-04
  • 在线发布日期: 2023-06-08
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