【作者】 卢忠远； 刘金梅； 徐迅； 严云；

【Author】 Lu Zhongyuana,b,Liu Jinmeia,b,Xu Xuna,band Yan Yuna,b a.Key Laboratory for Advanced Building Materials of Sichuan Province,Mianyang 621010,P.R.China b.School of Material Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,P.R.China

【机构】 先进建筑材料四川省重点实验室； 西南科技大学材料科学与工程学院；

【摘要】 本文利用自主开发的"以过热蒸汽作动力的超细粉体加工设备"制备超细粉煤灰,比较了不同细度的粉煤灰的性能。试验结果表明:利用过热蒸汽制备的超细粉煤灰性能优良,(1)当d(0.5)小于10μm时,其颗粒球度仍然保持完好,表面光滑,且颗粒粒径分布均匀;当d(0.5)达到3.66μm时,粉体中仍然有适量的球状颗粒;(2)超细粉煤灰细度越细活性越高,当d(0.5)达到3.66μm时,活性指数超过1(;3)超细粉煤灰与减水剂适应性良好,有共同减水作用,当d(0.5)达到3.66μm时,减水作用仍然明显;(4)用这种粉煤灰配制的砼性能优异。更多还原

【Abstract】 Ultra-fine fly ash(UFA)were prepared by using self-developed superheated steam flow pulverization system,and the performance of the as-prepared UFA with different degree of fineness has also been investigated.The results show that:(1)sphere-like UFA particles with smooth surfaces and homogeneous size distribution was observed when d(0.5)was less than 10 m,and amount of sphere-like particles were also existed when d(0.5)was 3.66 m,(2)the activity of the UFA increased with the increasing of the fineness,and the activity index would exceed to 1 when d(0.5) was 3.66 m,(3)the compatibility of the as-prepared UFA with superplasticizers was improved significantly,and the water-reducing synergistic effect has also been demonstrated;(4)the performane of the concrete was effectively improved with the adding of as-prepared UFA.更多还原