煅烧制度对高岭土活性及地聚物性能的影响
发布时间：2018-08-25 07:32
【摘要】：采用比表面积测试、活性铝含量测定、TG/DSC、XRD和分析测试手段表征煅烧制度对高岭土理化性质和微观结构的影响,揭示煅烧活化高岭土的相关活化机理。采用煅烧后的高岭土为原料制备地聚物样品,以抗压强度评价煅烧制度对地聚物性能的影响。结果表明:高岭土在600~900℃煅烧2 h后,大量羟基被脱除,晶体结构崩塌,煅烧产物为非晶态偏高岭土;在800℃煅烧4 h后,高岭土比表面积和活性硅、铝溶出率均达到最大值,具有较高的反应活性,由其制备的地聚物试样3 d抗压强度达到最大30.22 MPa,高岭土的煅烧制度对地聚物性能具有较大影响;地聚物抗压强度与高岭土中活性铝含量呈正相关。
[Abstract]:The effects of calcination system on the physicochemical properties and microstructure of kaolin were characterized by means of specific surface area measurement, TG- / DSC-XRD and analysis. The activation mechanism of calcined activated kaolin was revealed. After calcined kaolin was used as raw material to prepare polymer samples, and the influence of calcination system on the properties of geopolymers was evaluated by compressive strength. The results show that after calcined at 600 鈩，
本文编号：2202187
[Abstract]:The effects of calcination system on the physicochemical properties and microstructure of kaolin were characterized by means of specific surface area measurement, TG- / DSC-XRD and analysis. The activation mechanism of calcined activated kaolin was revealed. After calcined kaolin was used as raw material to prepare polymer samples, and the influence of calcination system on the properties of geopolymers was evaluated by compressive strength. The results show that after calcined at 600 鈩，
本文编号：2202187
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