| 基于CT扫描技术的水泥净浆微观结构及水化程度 |
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| 引用本文： | 吴泽弘,魏亚. 基于CT扫描技术的水泥净浆微观结构及水化程度[J]. 复合材料学报, 2020, 37(4): 971-977. DOI: 10.13801/j.cnki.fhclxb.20190612.001 |
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| 作者姓名： | 吴泽弘 魏亚 |
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| 作者单位： | 清华大学 土木工程系 土木工程安全与耐久教育部重点实验室, 北京 100084 |
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| 基金项目： | 中国交建2016年创新平台建设应用基础研究项目（2016-ZJKJ-PTJS04）；高寒高海拔地区道路工程安全与健康国家重点实验室基金（YGY2017KYPT-06） |
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| 摘 要： | 进行了0.3和0.5两种水灰比的水泥净浆从1~40天龄期的CT扫描试验,成功重构了水泥净浆尺度上的三维微观模型,观测了未水化水泥颗粒、水化产物和孔隙在这期间的形态变化。基于CT扫描的结果量化未水化水泥颗粒体积含量,进行了水化程度的计算。计算结果与常用的TGA方法进行比较,发现可比性好, CT扫描为一项较可靠的量化水泥水化程度的方法,但需要高精度的CT扫描设备。
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| 关 键 词： | 水泥净浆 CT扫描 三维重构 TGA 水化程度 |
| 收稿时间： | 2019-04-03 |
Microstructure and hydration degree of cement paste based on CT |
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| WU Zehong,WEI Ya. Microstructure and hydration degree of cement paste based on CT[J]. Acta Materiae Compositae Sinica, 2020, 37(4): 971-977. DOI: 10.13801/j.cnki.fhclxb.20190612.001 |
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| Authors: | WU Zehong WEI Ya |
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| Affiliation: | Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | CT scanning tests of cement paste with water/cement ratios of 0.3 and 0.5 from 1-40 days' age were carried out. The 3D microscopic model of cement paste was successfully reconstructed, and the morphological changes of unhydrated cement particles, hydration products and pores during this period were observed. Based on the results of CT scanning, the volume fraction of unhydrated clinkers and the hydration degree were calculated. The calculated results were compared with the commonly used TGA method, and agree well with the TGA results. CT scanning could be used as a reliable method for quantifying the hydration degree of cement. |
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| Keywords: | cement paste CT scanning 3D reconstruction TGA degree of hydration |
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