Synthesis and Microstructure Analysis of Autoclaved Aerated Concrete with Carbide Slag Addition

查看全文 作　　者：[1]范俊杰;CAO [2]Deguang;[1]景镇子;ZHANG [1]Yi;PU [1]Li;JING [3]Yani

机构地区：[1]School of Materials Science and Engineering, Tongji University;[2]School of Materials Science and Engineering,Guangxi University;[3]School of Internet of Things Engineering, Jiangnan University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2014年第29卷第5期,共6页

基　　金：Funded by the National Natural Science Foundation of China(Nos.51272180,51072138) 摘　　要：Synthesis of autoclaved aerated concrete(AAC) has been carried out with carbide slag addition, and the carbide slag could be used as a main material to produce the AAC with the compressive strength about 2 MPa and the density below 0.6 g?cm-3. In this study, quartz sand acted as frame structure phase in the matrix, and quartz addition also infl uenced the Si/Ca of starting material. Tobermorite and CSH gel were formed readily at 62%, which seemed to enhance the compressive strength of samples. Curing time seemed to affect the morphology of phase produced, and specimen with the plate-like tobermorite formed at 10 h appeared to have a better compressive strength development than the fiber-like one at 18 h. The higher curing temperature seemed to favor the tobermorite and CSH gel formation, which also exerted a significant effect on the strength development of the samples. On the micro-scale, the formed CSH gel was filled in the interface of the matrix, and the tobermorite appeared to grow in internal-surface of the pores and interstices. The tobermorite or/and CSH formation seemed to densify the matrix, and therefore enhanced the strength of the samples. 关键词：蒸压加气混凝土电石渣合成 CSH凝胶抗压强度雪硅钙石加法固化时间

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Synthesis and Microstructure Analysis of Autoclaved Aerated Concrete with Carbide Slag Addition

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