【摘要】 针对辽河中下游特细砂产量大、亟待开发利用的现状,展开辽河特细砂及特细砂混凝土相关研究;首先通过加密筛分试验确定该地区特细砂分布情况,并结合分形理论探讨其颗粒级配的分形特征,进而进行特细砂混凝土的试验研究,确定不同特细砂混凝土间和易性与强度的差异,并同普通中砂混凝土相应性能进行比较分析;最终,确定该地区特细砂粒度分布情况、测定了砂样的分维值并探讨了其对特细砂的表征意义,同时,获得特细砂混凝土强度随水灰比提高而下降、砂率在27%左右的特细砂混凝土强度会出现峰值、流动性低于同条件中砂混凝土等的性能规律,以期为当地工程应用提供有价值的参考,开启特细砂资源利用的崭新篇章。更多还原

【Abstract】 In view of this situation,where the super-fine sand was in high production and distributed widely along the Liao River,the research was focused on the super-fine sand and the super-fine sand concrete.Regarding the super-fine sand of Liao River as the object,conduct encrypted sieving experiment and ascertain this particle sample distribution.And then explore the distribution characteristics of the super-fine sand based on the fractal theory,so that ascertain the fractal dimension of samples and analysis its significance.At the same time,conduct the super-fine sand concrete preparation,and research the influence of the super-fine sand on corresponding concrete property.更多还原