矿渣基地质聚合物的吸水性能与孔结构分形特征研究  

Study on water absorption and pore structure fractal characteristics of slag-based geopolymer

作　　者：陈振[1] 张增志[1] 王立宁 王晗[1] 张尚生 Chen Zhen;Zhang Zengzhi;Wang Lining;Wang Han;Zhang Shangsheng(School of Mechanical Electronic and Information Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《矿业科学学报》2021年第2期204-209,共6页Journal of Mining Science and Technology

基　　金：国家自然科学基金(50772131);国家“863”计划(2011AA322100);教育部重点项目(106086);中央高校基本科研业务费专项资金(2010YJ05)。

摘　　要：为了研究矿渣基地质聚合物多孔材料在不同孔隙率、孔径分布情况下的吸水性能及改善机理,以高炉矿渣、粉煤灰、水玻璃为主要原料,以过氧化氢为发泡剂进行矿渣基地质聚合物的吸水、释水性能实验,并结合图像分析软件和分形理论分析其微观形貌及孔结构分形特征。实验结果表明,随着发泡剂使用量的增加,多孔材料的孔隙率、最可几孔径和吸水率相应增大,而材料释去单位质量水所需时间和孔隙表面分形维数随之减少;当发泡剂掺量为0.87%时,材料吸水率达到62%,释去单位质量水仅需1.38 h,此时材料兼顾了吸水性能和释水性能。To explore slag-based geopolymer porous material under the condition of different porosity,pore diameter distribution of performance and improve the mechanism of water absorption,the experiments on the water absorption,water release properties of the slag-bnsed geopolymer were Conducted,with blast furnace slag,fly ash,and sodium silicate as the main raw material,and hydrogen peroxide as foaming agent,Image analysis softwares and the fractal theory were adopted to analyze its microstructure and pore structure fractal characteristics.The results show that the porosity,maximum pore size and water absorption of the porous material increase with the increase of the foaming agent,while the time needed to release water per unit mass and fractal dimension of the pore surface decrease.When the dosage of foaming agent is 1.6 ml,the water absorption rate of the material reaches 62%,and the time required to release water per unit mass is only 1.38 h.At this point,both water absorption and water release properties of the material are taken into account.

关 键 词：多孔材料 孔隙率 孔径分布 图像分析 分形理论 吸水性 

分 类 号：TB32[一般工业技术—材料科学与工程]