为了研究石膏、硅灰对硅酸盐胶凝材料早期强度的影响,分别测试了石膏、硅灰不同掺量下的胶凝材料的4 h、1 d、28 d的抗压强度。利用X射线衍射仪和扫描电子显微镜分析了水化产物的微观结构特征。研究表明,在一定的试验范围内,胶凝材料的抗压强度随石膏的增加而变大,掺量为0.75%时最佳,4 h和1 d的抗压强度分别达到5.8 MPa和63.4 MPa；硅灰掺量从0%增长到15%,胶凝材料的各龄期抗压强度均随掺量的增加而呈增长趋势；硬化浆体的微观结构特征表明,一定的试验范围内,石膏使体系中的AFt数量增加,硅灰使体系中的C-S-H凝胶增多,且硅灰未水化的细小颗粒体有效填充硬化浆体的孔隙。
In order to study the influence of gypsum and silica fume on the early compressive strength of portland cementing material, we test the compressive strength of cement with different content of gypsum and silica fume at 4 h, 1 d and 28 d respectively. The microstructure characteristics of hydration products were analyzed by X-ray diffraction and scanning electron microscope. In a certain range, research shows that the compressive strength of cementing material increases with the content of gypsum increases, the compressive strength reaches peak when the content is 0 . 75%, and compressive strength reached 5 . 8 MPa and 63. 4 MPa at 4 h and 1 d. Silica fume increased from 0% to 15%, the compressive strength of cementing material increased by the content went up. The microstructure characteristics of the hardened cement paste shows that in, a certain range of gypsum to brought the amount of AFt in the system increased, the silica made the C-S-H get increased in the system,and unhydrated silica filled the pore of system.
参考文献
| [1] | 范建平 .超早强水泥基材料的制备与性能研究[D].东南大学,2015. |
| [2] | 贾会霞;吕淑珍;胡景亮;高燕;段新勇.石膏掺量对高贝利特-硫铝酸盐水泥性能的影响[J].武汉理工大学学报,2014(1):24-28. |
| [3] | 张烁;潘志华.化学物质对碱-矿渣水泥凝结时间和强度性能的影响[J].混凝土,2010(9):68-70,73. |
| [4] | 李春;汪春荣;王奎;乔宝.石膏品种与SO3含量对矿粉活性的影响[J].四川水泥,2012(5):54-56,58. |
| [5] | 韩佃利;徐国强;张静.硅灰掺量对水泥基灌浆料早期性能的影响研究[J].混凝土,2014(8):71-73. |
| [6] | 叶东忠.早强剂对掺硅灰的水泥砂浆强度与结构影响的研究[J].北京工商大学学报（自然科学版）,2009(02):8-11. |
| [7] | 要秉文;梅世刚;宋少民.石膏对高贝利特硫铝酸盐水泥水化的影响[J].武汉理工大学学报,2009(7):1-4. |
| [8] | 向佳瑜;余保英;李红傲.硅灰掺量对超硫酸盐水泥水化进程的影响?[J].施工技术,2015(3):89-92. |
| [9] | 丁向群;张冷庆;孙艳丽.基于混料实验研究矿物外加剂对氯氧镁水泥性能的影响[J].沈阳建筑大学学报（自然科学版）,2016(3):476-485. |
| [10] | 沈洁;丁向群;邢进;王钰;周睿彤.细骨料中的泥对聚羧酸减水剂性能的影响[J].硅酸盐通报,2014(3):449-453. |
| [11] | 戴银所.硅灰对水泥性能的影响[J].水泥,2002(10):13-14. |
| [12] | 叶东忠.硅灰对水泥净浆与砂浆性能及砂浆结构影响的研究[J].北京工商大学学报（自然科学版）,2007(06):11-15. |
| [13] | 程瑶;张美霞.绿色高强混凝土--硅灰混凝土[J].安全与环境工程,2002(3):33-36. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%