摘要
提出了一种在干旱区植树造林新材料技术,通过在粘土中加入不同比例或是经过不同试剂改性的粉煤灰,以增加其比表面积,从而提高导水性能,改进干旱区土壤的毛细引水特性,解决该地区植树造林的水分问题;同时达到对废弃粉煤灰资源再利用的目的。采用比表面积与孔径分布测定仪,扫描电镜,热重分析仪等仪器测试手段对试样进行表征。实验结果表明,粘土中粉煤灰所占比例为20%(质量分数)时,试样的导水效果最好;用盐酸或碳酸钠对添加剂粉煤灰进行改性能够提高粘土的导水能力,并分别在盐酸浓度为0.3mol/L、碳酸钠浓度为0.5mol/L时效果最好。
A new type technique of material which was used to plant trees in drought areas was developed. Joining the different comparison or modified fly ash by different reagent in clay, can increase its surface areas and improve conductivity function. This can ameliorate the soil＇s characteristic of water conductivity by capillarity in drought areas, solve its problem of lacking of water, and recycle scrap fly ash. The chosen samples were analyzed by BET surface area measurement, scanning electron microscope and thermal multi-analyzer. The results showed that the water conductivity of samples was best when fly ash was 20% in clay. Modified fly ash can improve its water conductivity function by using hydrochloric acid or sodium carbonate, and the effect was best when the concentration of hydrochloric acid was 0.3mol/L or sodium carbonate was 0. 5mol/L.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第7期22-26,共5页
Journal of Materials Engineering
基金
教育部重点项目(106086)
关键词
改性粉煤灰
粘土
比表面积
导水
modified fly ash
clay
surface areas
water conductivity
