地聚物多孔轻质高强材料的制备及孔结构特性  

Preparation and Pore Structure of Porous Geopolymer Material with Lightweight and High Strength

作　　者：尚建丽[1] 陈奇侠 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《硅酸盐通报》2016年第5期1385-1389,1395,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家"十二五"科技支撑计划项目(2011BAB03B05-1)

摘　　要：为了解决地聚物多孔材料质轻与高强难以取得一致性的问题,本文采用正交试验,对粉煤灰地聚物多孔材料表观密度和强度进行试验,在此基础上,利用超细矿渣粉的独特性,对双氧水发泡剂及辅助稳泡材料进行了优选,制备出抗压强度达到5.9 MPa、表观密度仅为557 kg/m^3的地聚物多孔材料。结果表明:当粉煤灰/矿渣比例为1∶1,双氧水掺量为2.0%,硬脂酸钙掺量为1.0%,MnO_2掺量为0.3%,制备的矿渣-粉煤灰基地聚物多孔材料可以达到质轻高强的目的。采用XRD、SEM和低场核磁共振技术对多孔材料进行了微观测试,并对其抗压强度、表观密度与孔结构之间关系进行了分析。In order to solve the problem of obtaining the consistency between light weight and high strength of the porous material,the orthogonal experiment was used to test the compressive strength and volume density of the fly ash-based foamed geopolymer. On this basis,by adding superfine slag powder and optimizing contents of hydrogen peroxide and foam stabilizer,and the compressive strength of the fly ash and slag based porous geopolymer was 5. 9 MPa,and its volume density was 557 kg / m3. The results showed that the fly ash and slag based porous geopolymer could achieve light weight and high strength under the conditions of 1∶ 1 ratio of the fly ash / slag,2. 0% hydrogen peroxide and 1. 0% stearic acid and0. 3% manganese dioxide. The microstructures of porous materials were tested by X-ray diffraction,scanning electron microscope and low field nuclear magnetic resonance（ NMR）,and the relationship among compressive strength,volume density and pore structure was analyzed.

关 键 词：粉煤灰 地聚物 多孔材料 矿渣 孔结构 

分 类 号：TD98[矿业工程—选矿]