研究炭化秸秆纤维与硅藻土协同作用对秸秆水泥基复合材料净化性能的影响,结果表明,经过600℃煅烧处理的低品位硅藻土表面微孔隙增加,比表面积增大。经过200℃真空炭化20min后,秸秆纤维的毛细管变得更加通透,秸秆炭化后比表面积比炭化前提高了近34倍。当硅藻土掺量占胶凝材料的25%时,测得原秸秆水泥基复合材料24h对甲醛的净化率为82.65%,持久净化率为51.96%;炭化后秸秆水泥基复合材料的24h净化率为88.59%,持久净化率为55.37%。可见,炭化秸秆纤维和硅藻土两者协同作用使秸秆水泥基复合材料对甲醛的净化能力显著提高。

The synergistic influence of carbonized straw fiber and diatomite on the formaldehyde purification performance of straw cement-based composite was studied.The results shown that the micro pores and specific surface area of low-grade diatomite calcined at 600℃ were increased.After 20 minutes of carbonization in vacuum at 200℃,the capillary of straw fiber became more transparent,and the specific surface area of straw fiber before and after carbonization increased nearly 34 times.When the content of diatomite accounts for 25% of the cementitious material,the purification rate of the original straw cement-based composite for formaldehyde in 24 hours was 82.65%,and the lasting purification rate was 51.96%.After lasting purification rate was 55.37%.The synergistic influence of carbonized straw fiber and diatomite significantly improved the formaldehyde purification ability of the composite.