【作者】 王刚； 马鸿文； 冯武威； 丁秋霞；

【Author】 WANG Gang, MA Hong_wen, FENG Wu_wei and DING Qiu_xia (School of Material Science and Technology, China University of Geosciences, Beijing 100083, China)

【机构】 中国地质大学材料科学与工程学院；

【摘要】 利用富钾岩石提钾后的废渣代替硅酸钠(钾)、大部分高岭石和氢氧化钠(钾) ,以粉煤灰为主要原料,制备出矿物聚合材料,并采用正交实验确定其优化工艺条件为:煅烧高岭石用量为10 %～15 % ,废渣用量约35 % ,氢氧化钠用量为5 %～6 %。代表性样品的7d抗压强度可达到4 0～5 0MPa ,耐酸性、耐碱性分别为99.99%和10 0 % ,密度1.77～1.88g/cm3 ,收缩率0 .13%～0 .2 8% ,导热系数0 .4 8～0 .5 1W/m·K ,平均硬度3.4 3。X射线粉末衍射分析表明,由铝硅酸盐聚合反应形成的基体相呈非晶态。扫描电镜分析絮凝状的基体相与粉煤灰玻璃体结合紧密,从而为制品具备良好的力学性能提供了结构基础。该矿物聚合材料成本低廉,同时又能利用粉煤灰等工业固体废物而达到改善环境的目的更多还原

【Abstract】 Fly ash was used as the main material to prepare mineral polymer in this study. The potassium_distilled waste residue obtained from potassium_rich slate was used as the raw material to replace sodium (potassium) silicate, calcined kaolin, sodium (potassium) hydroxide which are frequently used abroad to prepare mineral polymer. In this way, mineral polymer was prepared. The optimal technical parameters were determined by the orthogonal experiments: the weight proportions of calcined kaolin, waste residue and sodium hydroxide are about 10%～15%, 35% and 5%～6%, respectively. Compressive strengths of the representative mineral polymer samples were tested up to 40～50 MPa after 7d’s solidification. Tests show that the acid and alkali resistances of the samples are 99.99% and 100%, respectively, and their density, contractility, thermal conductivity and mean rigidity are 1.77～1.88 g/cm 3 , 0.13%～0.28%, 0.48～0.51 W/m·K and 3.43, respectively. XRD analysis shows that the matrix phase is amorphous. SEM photograph analysis shows that the floccule matrix phase is combined closely with the glass phase of the fly ash, which provides a good structural basis for the samples. The cost of mineral polymer is low, and it can improve the environment by the utilization of offal_like fly ash.更多还原