根据结晶诱导、超细粉体、化学激发等效应,通过抗压强度测试、XRD、热重、SEM等分析手段对大掺量粉煤灰的硫铝酸盐水泥进行了研究。实验结果表明,引入增强组分M后,试块2 h、3,7,28 d 最高抗压强度分别提高了140％,116％,80％和60％；钙矾石及铝胶生成量增多,体系变的更致密,2h 就能达很高强度；M的引入,可能使钙矾石初始结晶度变差；随养护龄期的延长,钙矾石结晶度逐渐变好,M促使粉煤灰参与后续水化反应,使粉煤灰颗粒被水化物紧密包裹,体系变得更致密,试块后期强度变大。
The composite cement of flyash and sulphatealuminium cement was studied by compressive strength XRD TG and SEM on the basis of induced crystallization effect particle effect and priming effect,etc.The re-sults show that,after adding M,the compressive strength of 2 h,3,7 and 28 d have improved 140%,116%, 80% and 60% respectively;more AFt and alumina gel are produced in early age and samples become more com-pactness;early phase crystalline forms of AFt may get poor;with the prolong of hydration time,crystalline forms of AFt improves,flyash participates in the send hydration reaction and is tightly binded by its hydration products,the system gets more compactness,so the long-term strength increases.
参考文献
| [1] | Wang Yanmou;Su Muzhen;Zhang Liang.Sulphoalumi-nate Cement[M].Beij ing:Beij ing Industrial University Press,1999 |
| [2] | Zhang Yunfei;Zhang Decheng.Study on the influ-ence of admixtures on the durability of sulphoaluminate cement based concrete[J].Cement,2007(10):16-18. |
| [3] | 王希泉,张玉飞,栾佳春,李军超.掺合料对硫铝酸盐水泥基混凝土抗压强度和抗渗性的影响[J].山东化工,2011(02):57-60. |
| [4] | Shi Yunxing;Wang Yiyun.Forming condition and Stabil-ity of Ettringite[J].Concrete,2000(08):52-54. |
| [5] | 韩建国,阎培渝.锂化合物对硫铝酸盐水泥水化历程的影响[J].硅酸盐学报,2010(04):608-614. |
| [6] | Wu Zongdao .Micromorphology of ettringite[J].China Building Materials Science and Technology,1995,4(04):9-14. |
| [7] | 彭家惠,楼宗汉.钙矾石形成机理的研究[J].硅酸盐学报,2000(06):511-515. |
| [8] | 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. |
| [9] | Shin G Y;Glasser F P .Chemistry of cement pore fluids I.Suspension reactions of Ca3-x Na2x Al2 O6 solid solutions with and without gypsum additions[J].Cement and Con-crete Research,1983,13(03):366-376. |
| [10] | Currell B R;Grzeskowlak R;Mldgley H G et al.The acceleration and retardation of set high alumina cement by additives[J].Cement and Concrete Research,1987,17(03):420-432. |
| [11] | Liu Shuhua;Leng Faguang;Li Lihua.Supplementary ce-menting materials used in concrete[M].Beijing:China Building Materials Press,2010 |
| [12] | Xinghua Fu;Chunxia Yang;Zongming Liu .Studies on effects of activators on properties and mechanism of hydration of sulphoaluminate cement[J].Cement and Concrete Research,2003(3):317-324. |
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