自燃煤矸石活性对水泥砂浆性能的影响

利用X-射线荧光光谱仪、X-射线衍射仪以及强度法对自燃煤矸石的活性进行了研究,将自燃煤矸石部分替代水泥制备成水泥砂浆,研究自燃煤矸石活性、用量对水泥砂浆性能的影响。结果表明,煤矸石中在自燃过程中形成的活性物为α-石英、无定形SiO2、κ-Al2O3和无定形Al2O3。自燃煤矸石的疏松程度会影响其活性;晶相结晶度的高低决定自燃煤矸石活性的高低;自燃煤矸石活性越高,其水泥基复合材料体系强度越高。

Influences of Activation Properties of Spontaneous Combustion Coal Gangue on Properties of Cement Mortar

The activation properties analysis of spontaneous combustion coal gangue is studied after selecting,crushing,milling and sieving by X-ray fluorescence spectrometer(XRF),X-ray diffraction(XRD) and method of intensity,and using spontaneous combustion coal gangue partly replacing cement to prepare cement mortar,the effects of activation properties and dosages of spontaneous combustion coal gangue on properties of cement mortar are investigated.The results indicate that the active substance of spontaneous combustion coal gangue are ??quartz,amorphous SiO2,amorphous Al2O3 and Al2O3.The activation properties of spontaneous combustion coal gangue are affected by the crystallization rate of crystal phase,and the activation properties is affected by the structure loose ratio.The strengths of cement-based compound materials are increased with the activation properties of spontaneous combustion coal gangue heightened.