钢渣-水泥复合胶凝材料水化过程及性能研究-材料工程专业论文.docxVIP

北京化工大学硕士学位论文分水化。水胶比为0．35、0．45、O．55、0．65时，钢渣一水泥复合胶凝材料水 北京化工大学硕士学位论文 分水化。水胶比为0．35、0．45、O．55、0．65时，钢渣一水泥复合胶凝材料水 化历程均为NG_I_÷D。增加净浆的水胶比，则KNG、墨、KD均减小，并 且净浆结构逐渐变得松散。 提高沙钢精炼渣的比表面积能够降低钢渣．水泥复合胶凝材料的净浆 膨胀率。在钢渣掺量lO％时，与比表面积为454．99 m2．kg-1的钢渣比较， 钢渣比表面积为598．43 ms·kg‘1的净浆沸煮膨胀率降低了72．14％，压蒸膨 胀率降低了51．40％。’SEM分析微观结构，增大钢渣的比表面积，浆体整 体结构逐渐致密。灰色关联度分析，在沸煮、压蒸条件下，钢渣掺量与膨 胀率的关联度分别为O．7207和0．8225，比表面积与膨胀率的关联度分别 为O．6081和0．5536，钢渣掺量对膨胀率的影响程度更大。 30％九江钢渣．70％水泥复合胶凝材料的胶砂强度在振实时间160 S 时，振实充分，并且3 d和7 d抗压强度最高。水胶比为0．40、0．45、0．50 和0．55时，胶砂抗压抗折强度随着水胶比的增加而降低。灰色关联度分 析得知，相较于振实时间，水胶比对于胶砂抗压抗折强度的影响更大，因 此为了提高钢渣的掺量，可以在降低水胶比的前提下，选择合适的振实时 间。 关键词：钢渣，水泥，水化热，动力学，膨胀率，强度 Ⅱ 万方数据 ABSTRACllSTUDY ABSTRACll STUDY ON HYDRATIoN PRoCESS AND PROPERTIES oF STEEL SLAG—CEMENT COMPLEX BINDER ABSTRACT Steel slag has the similar composition with cement，which its primary oxide compositions are Si02，CaO；hydraulic binding materials are C2S，C3S， and C3A．The application value from hydration heat point was researched when steel slag was used as cementitious material；hydration control mechanism from kinetics point was discussed；in order to improve the content of steel slag in gel materials，the improved methods of volumetric stability and early strength were studied in this paper． Hydration heat emission rate curve of complex binder with steel slag from Xinyu and cement was similar with the cement’S，which involved pre—induction period，induction period，acceleratory period，deceleration period and stabilization period．When adding quantities of steel slag were 20％， 30％，40％，in the early hydration stage，steel slag had inhibiting effect to the early hydration of cement．When the content of steel slag was 0-40％，with the increase of steel slag，hydration heat emission rate of acceleratory period reduced，hydration heat reduced．Steel slag could reduce the hydration heat， thermal stress and probability of crack appearance．The strength of 万方数据 北京化工大学硕士学位论文composition 北京化工大学硕士学位论文 composition binder would be reduced when the content of steel stag was too hi曲．W