| 胡元元,李明泽,侯欣文,席 峥,徐 萍,魏伟伟.非洲地区用海工型抗硫酸盐硅酸盐
水泥应用研究[J].水泥工程,2025,38(5):78-81 |
| 非洲地区用海工型抗硫酸盐硅酸盐
水泥应用研究 |
| Application research on the use of marine-type sulfate-resistant Portland cement in Africa |
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| DOI： |
| 中文关键词: 氯离子扩散系数 抗硫酸盐侵蚀系数 孔隙率 |
| 英文关键词: Chloride ion diffusion coefficient sulfate resistance coefficient porosity |
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| 中文摘要: |
| 针对非洲地区生产海工型水泥受原材料资源限制的束缚，就地取材，以特定矿物组成的特种熟料为基材，辅以非洲当地石灰石、砂岩、玻璃等资源，研究开发一种适合在非洲地区制造、销售用海工型抗硫酸盐硅酸盐水泥。并采用扫描电子显微镜（SEM）和CT扫描技术研究材料微观结构的演变过程。结果表明，熟料掺量87%，石膏5%、石灰石3%、砂岩2%和玻璃相3%时配制的水泥主要物理和化学性能指标满足相应法国标准技术要求。同时结合特种水泥标准技术要求进行相应性能测试，其中抗硫酸盐侵蚀性系数为1.38，氯离子扩散系数为1.72×10-12 m2/s、14 d线性膨胀0.03%，水化热3 d、7 d分别为223 J/g、267 J/g，水泥石CT孔隙率大小为4.81%，水化产物结构致密。 |
| 英文摘要: |
| This article breaks through the limitations of raw material resources in the production of marine type cement in Africa， using sourced materials and special clinker composed of specific minerals as the base material， supplemented by local resources such as limestone， sandstone， and glass in Africa， to research and develop a marine type sulfur resistant silicate cement suitable for manufacturing and sales in Africa. And the evolution process of the microstructure of the material was studied using scanning electron microscopy （SEM） and CT scanning techniques. The results show that the main physical and chemical performance indicators of the cement prepared with a clinker content of 87%， gypsum content of 5%， limestone content of 3%， and sandstone content of 2% meet the corresponding French standard technical requirements. At the same time， corresponding performance tests were conducted in accordance with the technical requirements of special cement standards. The resistance coefficient to sulfate attack was 1.38， the chloride ion diffusion coefficient was 1.72×10-12 m2/s， and the linear expansion at 14 d was 0.03%. The hydration heat at 3 d and 7 d was 223 J/g and 267 J/g， respectively. The CT porosity of cement stone was 4.81%， and the hydration product structure was dense. |
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