| 摘要: |
| 研究了不同掺量磷建筑石膏对硫铝酸盐水泥熟料凝结时间、化学收缩、自收缩、浆体内部相对湿度和干燥收缩的影响.结果表明：随着磷建筑石膏掺量的增加，熟料浆体的凝结时间显著缩短，化学收缩变化速率加快，浆体内部相对湿度逐渐降低，浆体自收缩与内部相对湿度具有较好的相关性；当磷建筑石膏掺量不超过25%时，硫铝酸盐水泥浆体化学收缩到达稳定阶段的时间缩短；当磷建筑石膏掺量为25%~30%时，硫铝酸盐水泥浆体在自收缩测试条件下产生膨胀，且干燥收缩小于空白组. |
| 关键词: 磷建筑石膏 化学收缩 自收缩 内部相对湿度 干燥收缩 |
| DOI：10.3969/j.issn.1007-9629.2022.09.002 |
| 分类号:TQ172 |
| 基金项目:长江科学院开放研究基金资助项目（CKWV2019756/ KY）；国家自然科学基金资助项目（51608402） |
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| Effect of Phosphorous Calcined Gypsum on Shrinkage Characteristics of Calcium Sulfoaluminate Cement Clinker |
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HUANG Haoran1,2, LIAO Yishun1,3, JIANG Guoxi1, LIAO Guosheng1,3, MEI Junpeng1,3
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1.School of Urban Construction， Wuhan University of Science and Technology， Wuhan 430065， China;2.China First Metallurgical Group Company Limited， Wuhan 430080， China;3.Institute of High Performance Engineering Structure， Wuhan University of Science and Technology， Wuhan 430065， China
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| Abstract: |
| The setting time， chemical shrinkage， autogenous shrinkage， internal relative humidity and drying shrinkage of calcium sulfoaluminate （CSA） cement clinker blended with different amounts of phosphorous calcined gypsum （PCG） were investigated. The results show that the setting time of paste is shortened significantly with the increase of PCG content， and the rate of chemical shrinkage and the internal relative humidity of the paste is decreased gradually. The autogenous shrinkage has a good relationship with the internal relative humidity of the paste. The stable stage of chemical shrinkage is accelerated when the content of PCG is not more than 25%. When the content of PCG is 25% to 30%, the CSA cement paste expanded during the autogenous shrinkage test and the drying shrinkage of CSA cement clinker pastes are less than the control sample. |
| Key words: phosphorous calcined gypsum（PCG） chemical shrinkage autogenous shrinkage internal relative humidity drying shrinkage |
