以偏高岭土为主要固体原料,掺加少量粉煤灰和矿渣,以硅酸钠水玻璃为碱激发剂,制备了偏高岭土基地质聚合物.研究了粉煤灰含量、水玻璃模数、养护方式和矿渣掺量对样品抗压强度的影响.结果表明,在粉煤灰含量为35%、硅酸钠水玻璃模数为l.2、矿渣含量为10%时样品具有较高的抗压强度,养护温度为常温时,28天强度为72MPa,80℃时可达80MPa;通过XRD和MAS-NMR微观分析表明制备的地质聚合物具有类沸石结构,其微观结构形态为无定形态;-Si-O-Al-的键接方式主要为SiQ4(4Al)、SiQ4(2Al)和SiQ4(4Si).
In this paper,the influences of the factors,including the mass of fly ash,the modulus of sodium silicate,the method of curing and the amount of slag on the compress strength of metakaolin-based geopolymer are synthesized mainly from metakaolin,a spot of fly ash and slag and the alkli-activator:sodium silicate solution.It is concluded that while the mass fraction of fly ash is 35%,the modules of sodium silicate is 1.2 and the mass fraction of slag is 10%,the sample will gain higher compress strength.Metakaolin-based geopolymer cured at 80℃ gains higher compress strength than that of cured at 25℃.XRD and MAS-NMR are used to analyze the microstructure of products,which gains a three dimensional framework,like the zeolite crystals with amorphous structure.SiQ4(4Al) ,SiQ4(2Al) and SiQ4(4Si) are the main types of -Si-O-Al-bonds.
参考文献
| [1] | Davidovits J .G-eopolymers:Inorganic polymeric new materials[J].Journal of Thermal Analysis,1991,37:1611. |
| [2] | 王晴,吴昌鹏,赵新宇,隋智通.矿渣基无机矿物聚合物与减水剂的适应性[J].沈阳建筑大学学报（自然科学版）,2008(01):100-103. |
| [3] | 王鸿灵,李海红,冯治中,田农,阎逢元.偏高岭石基土聚水泥的研究[J].硅酸盐通报,2005(02):113-116. |
| [4] | Xu Hua;Van Deventer J S J.The geopolymerisation of alumino-silicate mineral[J].International Journal of Mineral Processing,2000(59):247. |
| [5] | Van Jaarsveld J G S;Van Deventer J S J;Lukey G C.The characterization of source materials in fly ash-based geopolymers[J].Materials Letters,2003(57):1272. |
| [6] | 张云升,孙伟,贾艳涛,金祖权.用IR探索地聚合物水泥硬化产物的组成和结构[J].武汉理工大学学报,2005(11):27-30. |
| [7] | 郝德生,赵家林,刘立佳,颜培力.粉煤灰地质聚合物的研制[J].齐齐哈尔大学学报（自然科学版）,2005(03):25-27. |
| [8] | 付兴华,陶文宏,孙凤金.水玻璃对地聚物胶凝材料性能影响的研究[J].水泥工程,2008(02):6-9,28. |
| [9] | 张云升 .高性能地聚合物混凝土结构形成机理及其性能研究[D].东南大学,2003. |
| [10] | Klinowski J.Nuclear magnetic resonance studies of zeolites[J].Progress in NMR Spectroscopy,1984(16):237. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%