【摘要】：采用比表面積測(cè)試、活性鋁含量測(cè)定、TG/DSC、XRD和分析測(cè)試手段表征煅燒制度對(duì)高嶺土理化性質(zhì)和微觀結(jié)構(gòu)的影響,揭示煅燒活化高嶺土的相關(guān)活化機(jī)理。采用煅燒后的高嶺土為原料制備地聚物樣品,以抗壓強(qiáng)度評(píng)價(jià)煅燒制度對(duì)地聚物性能的影響。結(jié)果表明:高嶺土在600~900℃煅燒2 h后,大量羥基被脫除,晶體結(jié)構(gòu)崩塌,煅燒產(chǎn)物為非晶態(tài)偏高嶺土;在800℃煅燒4 h后,高嶺土比表面積和活性硅、鋁溶出率均達(dá)到最大值,具有較高的反應(yīng)活性,由其制備的地聚物試樣3 d抗壓強(qiáng)度達(dá)到最大30.22 MPa,高嶺土的煅燒制度對(duì)地聚物性能具有較大影響;地聚物抗壓強(qiáng)度與高嶺土中活性鋁含量呈正相關(guān)。
[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，

本文編號(hào)：2202187