文献类型：期刊文献

中文题名：交流电养护对偏高岭土基地聚合物组成、结构和性能的影响

英文题名：Influence of AC Curing on the Composition,Structure and Properties of Metakaolin Based Geopolymer

作者：王全林[1,2,3];胡云进[1,2,3];何曜谷[1,2,3]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]浙江省岩石力学与地质灾害重点实验室,浙江绍兴312000;[3]浙江省山体地质灾害防治协同创新中心,浙江绍兴312000

年份：2022

卷号：40

期号：6

起止页码：1034

中文期刊名：材料科学与工程学报

外文期刊名：Journal of Materials Science and Engineering

收录：CSTPCD、、北大核心、CSCD、北大核心2020、CSCD_E2021_2022

基金：国家自然科学基金资助项目(41977256)。

语种：中文

中文关键词：地聚合物;交流电压;内部温度;抗压强度

外文关键词：Geopolymer;AC voltage;Internal temperature;Compressive strength

中文摘要：本研究以偏高岭土为主要硅铝原材料,通过添加碳纤维来提高固化效率和导电性能,得到了不同交流电压养护2 h后的地聚合物抗压强度以及试样内部温度的变化规律,并通过扫描电镜(SEM)、压汞法(MIP)、X射线衍射(XRD)和傅里叶变换红外光谱(FTIR)等表征手段研究了其电养护机理。结果表明:随着交流电压的增大,地聚合物试样内部温度峰值增高,峰值到达时间减小,抗压强度增大;交流电压为5 V时抗压强度达到45 MPa,与常温养护相比增加了36%,与同时间烘箱养护相比增加了32%。随着交流电压的增大,凝胶结构致密,孔隙较小,碳纤维与凝胶界面之间粘接很好;Si—O—Si键和Si—O—Al键不对称拉伸和振动,波长向低方向移动导致抗压强度升高。

外文摘要：Metakaolin was used as the main raw material,and carbon fiber was added to improve the curing efficiency and conductivity.The compressive strength of geopolymer and the change of internal temperature of sample after 2 h of AC curing under different conditions were obtained.The mechanism of electrical curing was studied by scanning electron microscopy(SEM),mercury intrusion porosimetry(MIP),X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTIR).The results show that with the increase of AC voltage,the peak temperature of geopolymer sample increases,the peak arrival time decreases,and the compressive strength increases.When the AC voltage is 5 V,the compressive strength can reach 45 MPa increased by 36%compared with normal temperature curing,and increased by 32%compared with oven curing at the same time.With the increase of the AC voltage,the gel microstructure is compact and the pores are small.The bonding between the carbon fiber and the gel interface is very good.FTIR analysis shows that the Si—O—Si bonds and Si—O—Al bonds are asymmetrically stretched and vibrate along with the increase of the AC voltage,and the wavelength shifts to the lower direction,resulting in the increase of the pressure resistance.