【作者】 王晓钧； 朱红飞； 从小晔； 郭亮志；

【Author】 WANG Xiao-jun~*,ZHU Hong-fei,CONG Xiao-ye,GUO Liang-zhi (College of Material Science and Engineering,Nanjing University of Technology,Nanjing 210009,China)

【机构】 南京工业大学材料科学与工程学院；

【摘要】 对硅灰掺量为10%、20%和30%,水灰比为0.28、0.32和0.36的硅灰.水泥复合胶凝体系3d至90d的抗压强度和水化率进行了研究,比照对应的水泥净浆的抗压强度和水化率,结合硅灰在模拟水泥碱度条件下反应率,得出硅灰加速硅灰.水泥复合胶凝体系水化的作用。在模拟水化过程中,硅灰的硅氧结构从Q4结构发生分解,转为Q2类的结构,在90天时硅灰的Q4主体结构全部分解,转化为Q1、Q2B和Q2P结构共溶的CSH凝胶。由于硅灰在碱环境条件下的火山灰活性逐渐地体现,所以硅灰.水泥复合体系的抗压强度在56天接近P.I水泥净浆的抗压强度,在90天后超越水泥净浆的强度。更多还原

【Abstract】 The compression strength and the hydration degree of the complex cement paste with 10%,20%and 30%of silica fume and water to cement ratio of 0.28,0.32 and 0.36 from three days to ninety days were studied.Compared to both the compression strength and the hydration degree of the P.I cement paste and the reaction degree of silica fume in simulate alkaline solution,it was deduced that the silica fume accelerated the hydration of the complex cement paste.The acceleration mechanism was that the Q4 structure in silica fume decomposed and changed into the Q2 structure of CSH,and till 90 days the Q4 structure was completely transformed into CSH gel with Q1,Q2B and Q2P structure.As the pozzolana of silica fume was released significantly,the compression strength of the complex cement paste was approached to that of P.I cement paste at 56 days and exceeded at 90 days.更多还原