【摘要】 本研究以煤气化炉渣为主要原料，煤化工高盐废水替代自来水为拌合剂，辅以少量的Ca（OH）₂制备了煤气化炉渣基胶凝材料，研究了高盐废水掺量和养护制度对煤气化炉渣基胶凝材料的抗压强度的影响，并借助X射线衍射仪（XRD）、傅里叶变换红外光谱仪（FTIR）和扫描电子显微镜（SEM）等技术手段分析材料的性能影响机理。结果表明：高盐废水辅助Ca（OH）₂激发的煤气化炉渣基胶凝材料的抗压强度随废水掺量的增加，呈先增加后减少规律；蒸汽养护优于常温养护，蒸汽养护的试件28 d抗压强度可达到14 MPa,与室温养护相比提高了2.6倍。高盐废水辅助Ca（OH）₂加速了煤气化炉渣中活性硅铝的水化，使T-O的非对称伸缩振动吸收峰和H-O的非对称伸缩振动吸收峰发生了偏移，生成更多的硅铝酸盐凝胶，提高了煤气化炉渣基胶凝材料的致密度。更多还原

【Abstract】 Coal gasification slag based cementitious materials were prepared by using coal chemical high-salt wastewater instead of tap water as the mixing water, supplemented with a small amount of Ca（OH）₂. The influence of high-salt wastewater content and curing system on the compressive strength of coal gasification slag based cementitious materials was studied, and the mechanism was analyzed by means of X-ray diffraction（XRD）, Fourier transform infrared spectroscopy（FTIR） and scanning electron microscope（SEM）. The results showed that the compressive strength of coal gasification slag based cementitious materials increased initially and then decreased with the increasing content of wastewater. The compressive strength of coal gasification slag based cementitious materials cured with steam developed better than cured at the room temperature. The compressive strength of specimens cured with steam reached 14 MPa at 28 days, which is 2.6 times higher than that cured at room temperature. The co-excitation of high-salt wastewater and Ca（OH）₂ accelerated the hydration of activated silica and aluminum in the coal gasification slag, resulting in the migration of the asymmetric stretching vibration absorption peak of T-O and the asymmetric stretching vibration absorption peak of H-O. Thus more aluminosilicate gel was generated and the density of coal gasification slag based cementitious materials was increased.更多还原