摘要
本文在碱激发粉煤灰基地质聚合物基础上,在粉煤灰中掺入适量石棉尾矿酸浸渣制备了一种发泡地质聚合物材料,研究了不同掺量下,石棉尾矿酸浸渣对粉煤灰基发泡地质聚合物性能的影响。结果表明,石棉尾矿酸浸渣的掺入明显提高了粉煤灰基发泡地质聚合物力学性能。在聚合物体系中Si O2/Al2O3=3.7、Na2O/Al2O3=1条件下,石棉尾矿酸浸渣掺量为10%时,聚合物28d抗压强度最高,为1.8MPa,比不掺石棉尾矿酸浸渣的地质聚合物抗压强度高了26%。SEM微观形貌分析表明,掺入适量石棉尾矿酸浸渣对发泡地质聚合物物孔结构有优化作用;X射线衍射分析表明,形成的地质聚合物为无定形矿物相。
The effect of acid leaching residue of asbestos tailings (RAT) on the performance of fly ash based geopolymers was investigated. The results show that the addition of RAT significantly improve the mechanical properties of fly ash based foam geopolymer. In the case of SiO2/Al2O3 = 3.7, Na20/Al2O3 = 1, and 10% RAT, the compressive strength of the specimens reaches 1.8 MPa which increases by 26% comparing to the specimens without RAT. The SEM images show that the pore structure is improved by adding RAT. The XRD results indicate that the geopolymer formed is amorphous phase.
出处
《电子显微学报》
CAS
CSCD
2015年第6期508-513,共6页
Journal of Chinese Electron Microscopy Society
基金
中央高校基本科研业务费(2009QH02
2009KH09)
关键词
发泡地质聚合物
循环流化床粉煤灰
石棉尾矿酸浸渣
微观形貌
强度
foam geopolymer
circulating fluidized bed combustion fly ash
acid leaching residue of asbestos tailings
microstructure
strength