【摘要】 用差热分析、热失重分析、X射线分析等半定量方法,研究了掺入MF减水剂对硅酸盐水泥水化动力学过程的影响,并用扫描电镜和水银压入测孔法研究了掺与不掺MF减水剂的水泥砂浆结构。试验结果表明:MF减水剂加入后水泥砂浆强度提高的原因不是由于加速了水泥的水化速度,主要是改善了水泥砂浆的结构,即减少了水泥砂浆的总孔隙率并使孔隙变小,从而使结构变得致密,并由于MF减水剂的分散作用使水泥砂浆结构变得均匀。 经上述工具鉴定,未发现掺MF减水剂的水泥有新的水化产物的形成。更多还原

【Abstract】 Differential thermal analysis, thermo-gravimetric analysis and X-ray semiquantitativeanalysis have been employed in the study of the effect of MF water reducing agent on thehydration kinetics of portland cement, and scanning electronmicroscope and mercuryporosimeter have been used in comparing the structure of cement mortars with or withoutthe addition of MF agent. Results obtained indicate that the increase of mortar strength after introducing MFagent is not due to the acceleration of cement hydration but to the improvement of struc-ture and reduction of total porosity of the mortar, the pore size being diminished andstructure becoming denser.Furthermore due to the dispersive action of MF, the motar struc-ture on the whole becomes more homogeneous. Lastly in the present investigation no new hydration product has been found by addingMF agent.更多还原