热活化污泥—高钙粉煤灰复合地聚合物的性能与机理研究

研究采用水玻璃激发的高钙粉煤灰和热活化污泥制备复合地聚合物的可行性,并讨论制备的复合地聚合物的性能与机理.结果表明:经900℃焙烧1h的污泥(<45μm)以10%质量分数的掺量取代高钙粉煤灰后研制成的地聚合物具有较好的抗压强度;在复合地聚合物体系中,无定形地聚合物凝胶包裹在球状粉煤灰颗粒周围,有类沸石矿物生成,出现Al—O/Si—O对称伸缩峰及Si—O—Si/Si—O—Al弯曲振动峰.这一研究可以丰富地聚合物原材料的选择,有助于含硅铝相和含钙工业废弃物的资源化利用.

PERFORMANCES AND MECHANISM OF COMPLEX GEOPOLYMERS PREPARED FROM THERMALLY-TREATED SLUDGE AND HIGH-CALCIUM FLY ASH

A study was made of the feasibility to prepare a complex geopolymer by water glass-activated high-calcium fly ash and thermally-treated sludge,and the performance and mechanism of the geopolymer were also explored.The results show that compressive strength of the geopolymer is better when 10% fly ash is replaced by thermally-activated sludge(<45 μm) at 900 ℃ for 1 hour.In complex geopolymeric matrix,amorphous geopolymeric gel coveres around spherical fly ahs granule,the Zeolite-like mineral formes,meanwhile,the asymmetric stretching Al—O/Si—O bonds and Si—O—Si/Si—O—Al bending band appear.This work is beneficial for extending raw materials of geopolymer,and also for utilizing of multi industrial wastes,especial the wastes containing silicate-aluminum phase and calcium.