利用赤泥制备高强陶粒的试验研究

本资料包含pdf文件1个，下载需要1积分

High-strength ceramisite was prepared by using Bayer red mud, shale and fly ash. When the content of red mud was 50% , ceramisite bulk density of 840 kg/m3, cylindrical compress strength of 7.5 MPa, strength grade of 45 MPa, 1 h-water absorption of 7.6% , apparent density of 1 000 kg/m3 and porosity of 16.0% were obtained. The radioactivity of the ceramistie can meet the requirement for lightweight aggregate. The sintering mechanism of red mud ceramisite was analyzed by XRD, SEM and other analytical methods.利用拜耳法赤泥、页岩和粉煤灰等原料制备了高强陶粒。赤泥掺入量为50％时，陶粒堆积密度840kg／m^3，筒压强度达到7．5MPa，强度标号45MPa，1h吸水率7．6％，表观密度1000kg／m^3，孔隙率16．0％，放射性能够满足作为轻集料的活度要求。利用XRD、SEM等分析手段，对赤泥陶粒烧结机理进行了探讨。