研究了不同掺量纳米SiO2对硫铝酸盐水泥抗压/抗折强度的影响,即掺入纳米SiO2使水泥砂浆早期抗压/抗折强度显著提高,后期抗折强度未出现倒缩现象且具有较大的上升空间,掺3％纳米SiO2水泥砂浆2,8h,1,3,28和56 d抗折强度相比空白样分别提高了44.84％,41.80％,37.85％,37.78％,42.32％和65.03％.并通过XRD、SEM-EDS及水化热揭示了强度发展的影响机理.即水化早期的微集料填充作用、结晶成核作用使硬化浆体微观结构均匀密实,并促进了硫铝酸盐水泥8h前的水化;水化后期纳米SiO2的火山灰效应进一步提高了水泥的水化程度.
参考文献
| [1] | Ellis Gartner.Industrially interesting approaches to "low-CO_2" cements[J].Cement and Concrete Research,20049(9):1489-1498. |
| [2] | C. D. Popescu;M. Muntean;J. H. Sharp.Industrial trial production of low energy belite cement[J].Cement & concrete composites,20037(7):689-693. |
| [3] | 韩建国;阎培渝.碳酸锂对硫铝酸盐水泥水化特性和强度发展的影响[J].建筑材料学报,2011(1):6-9. |
| [4] | 马保国;朱艳超;胡迪;李海南.甲酸钙对硫铝酸盐水泥早期水化过程的影响[J].功能材料,2013(12):1763-1767. |
| [5] | 马保国;韩磊;李海南;谭洪波;王允栋.硫铝酸盐水泥基胶凝材料的改性研究?[J].功能材料,2015(5):5062-5066. |
| [6] | F.P. Glasser;L. Zhang.High-performance cement matrices based on calcium sulfoaluminate-belite compositions[J].Cement and Concrete Research,200112(12):1881-1886. |
| [7] | 王培铭;徐玲琳;张国防.0～20℃养护下硅酸盐水泥水化时钙矾石的生成及转变[J].硅酸盐学报,2012(5):646-650. |
| [8] | Ali Nazari;Shadi Riahi.The effects of SiO_2 nanoparticles on physical and mechanical properties of high strength compacting concrete[J].Composites, Part B. Engineering,20113(3):570-578. |
| [9] | Bo Yeon Lee;Amal R. Jayapalan;Kimberly E. Kurtis.Effects of nano-TiO_2 on properties of cement-based materials[J].Magazine of concrete research,201321/22(21/22):1293-1302. |
| [10] | Ye Qing;Zhang Zenan;Kong Deyu.Influence of nano-SiO_2 addition on properties of hardened cement paste as compared with silica fume[J].Construction and Building Materials,20073(3):539-545. |
| [11] | 叶青;张泽南;孔德玉;陈荣升;马成畅.掺纳米SiO2和掺硅粉高强混凝土性能的比较[J].建筑材料学报,2003(4):381-385. |
| [12] | L. Zhang;F. P. Glasser.Hydration of calcium sulfoaluminate cement at less than 24 h[J].Advances in Cement Research,20024(4):141-155. |
| [13] | Frank Winnefeld;Barbara Lothenbach.Hydration of calcium sulfoaluminate cements — Experimental findings and thermodynamic modelling[J].Cement and Concrete Research,20108(8):1239-1247. |
| [14] | Irvin A. Chen;Craig W. Hargis;Maria C.G. Juenger.Understanding expansion in calcium sulfoaluminate-belite cements[J].Cement and Concrete Research,20121(1):51-60. |
| [15] | M.CG. Juenger;F. Winnefeld;J.L. Provis.Advances in alternative cementitious binders[J].Cement and Concrete Research,201112(12):1232-1243. |
| [16] | Pengkun Hou;Kejin Wang;Jueshi Qian.Effects of colloidal nanoSiO_2 on fly ash hydration[J].Cement & concrete composites,201210(10):1095-1103. |
| [17] | 徐迅;卢忠远.纳米二氧化硅对硅酸盐水泥水化硬化的影响[J].硅酸盐学报,2007(4):478-484. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%