针对高掺量矿渣水泥与普硅水泥不同龄期时强度及水化机理的差异,测试分析了普硅水泥浆体(编号PC)和掺60％矿渣粉的水泥浆体(编号SC)各龄期强度及强度发展系数,并对比了两组试样早期水化放热速率,各龄期水化产物相及孔结构的变化.结果表明:SC试样3d、7d强度仅为25.6 MPa、39.5 MPa,分别低于同龄期PC试样13.3MPa及8.3 MPa;28 d、90d强度分别为55.7 MPa、59.6 MPa,高于同龄期PC试样3.5 MPa及2.2 MPa.两种水泥浆体早期强度主要受早期水化放热速率、孔结构分布特征的影响,后期高掺量矿渣水泥强度发展的优势在于:矿粉颗粒的填充效应以及二次火山灰活性,使其浆体形成了更多的水化产物,孔结构更加致密,有利于浆体强度的提高.
参考文献
| [1] | 孔德玉,张俊芝,倪彤元,蒋靖,方诚.碱激发胶凝材料及混凝土研究进展[J].硅酸盐学报,2009(01):151-159. |
| [2] | O. Boukendakdji;S. Kenai;E.H. Kadri;F. Rouis .Effect of slag on the rheology of fresh self-compacted concrete[J].Construction and Building Materials,2009(7):3593-3598. |
| [3] | Qiang Zeng;Kefei Li;Teddy Fen-chong .Pore structure characterization of cement pastes blended with high-volume fly-ash[J].Cement and Concrete Research,2012(1):194-204. |
| [4] | Hae-Jeong Hwang;Seung-Heun Lee;Etsuo Sakai .Rheological behavior of a slag cement paste prepared by adjusting the particle size distribution[J].Journal of Ceramic Processing Research. (Text in English),2009(4):409-413. |
| [5] | S.C. Pal;A. Mukherjee;S.R. Pathak .Investigation of hydraulic activity of ground granulated blast furnace slag in concrete[J].Cement and Concrete Research,2003(9):1481-1486. |
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%