糯米淀粉对氯氧镁胶凝材料性能影响的研究  

Effect of the Glutinous Rice Amylopectin on the Properties of Magnesium Oxychloride Cement Material

作　　者：张晓彬 刘作冬 林晓如 殷博文 刘鹏[1] ZHANG Xiao-bin;LIU Zuo-dong;LIN Xiao-ru;YIN Bo-wen;LIU Peng(Henan Province Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan,Xinyang Normal University,Xinyang 464000,China)

机构地区：[1]信阳师范学院,河南省豫南非金属矿资源综合利用重点实验室,信阳464000

出　　处：《硅酸盐通报》2018年第3期861-867,共7页Bulletin of the Chinese Ceramic Society

基　　金：河南省重大科技专项(141100310600);信阳师范学院研究生科研创新基金(2016KYJJ13)

摘　　要：研究了糯米淀粉(GR)改性对氯氧镁胶凝材料(MOC)性能的影响和泛霜抑制作用,通过XRD、SEM和FT-IR对样品的水化相、微观结构形貌和官能团键合情况进行了表征和分析。实验结果表明:糯米淀粉的加入有利于MOC体系中强度相的生成,糯米淀粉的活性官能团与MOC发生一定的化学键合或物理结合,使水化物呈重叠交叉网状,结构更加致密。糯米淀粉的最佳用量为氧化镁质量分数的3%,在MOC中添加3%的生糯米淀粉(RGR),MOC的3 d、7 d、28 d抗压强度相对于空白样品分别提高46.78%、32.65%、29.49%,28 d软化系数为0.81;添加3%的糊化糯米淀粉(GGR),MOC的3 d、7 d、28 d抗压强度相对于空白样品分别提高38.26%、27.92%、24.91%,28 d软化系数为0.79。生糯米淀粉较糊化糯米淀粉对MOC性能改善更加明显。The influence of the modification of glutinous rice(GR)amylopectin on the properties of magnesium oxychloride cement(MOC)and the effects of the frost inhibition were studied.The hydration phase compositions,micromorphology and functional group bonding of the samples were characterized and analyzed by XRD,SEM and FT-IR,respectively.The results show that the addition of glutinous rice amylopectin is advantageous to formation of strength phase within the MOC system,the reactive functional groups of starch with MOC are chemically bonded or physical combination,the hydration phase formed crossover network and the micromorphology of samples are more compact.The optimal dosage of glutinous rice amylopectin(RGR)is 3%mass compared to magnesium oxide.Added 3%of raw glutinous rice amylopectin(GGR)into MOC,the 3d,7d and 28d compressive strength relative to the blank sample increased by 46.78%,32.65%and 29.49%,respectively,and 28 d softening coefficient is 0.81.Added 3%of gelatinized glutinous rice amylopectin into MOC,the 3d,7d and 28 d compressive strength relative to the blank sample strength increased by 38.26%,27.92%and 24.91%,respectively,and 28d softening coefficient is 0.79.Compared to gelatinized glutinous rice amylopectin,the raw glutinous rice amylopectin have more obviously effect in the improving of performance to the MOC.

关 键 词：糯米淀粉 氯氧镁胶凝材料 力学性能 耐水性 泛霜 

分 类 号：TQ172.72[化学工程—水泥工业]