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采用具有粒子动态混合密实功能的SPACE系统,实现了高集料体积分数模型砂浆结构的生成。从而,以3种细集料粒径分布的模型砂浆(其中一种的粒径范围为0.125~1.34mm,另外两种的粒径范围为0.25~5.00mm)结构为例,研究了集料细度和集料体积分数(φ=40%~70%)对邻近集料表面最近间距分布的影响。结果表明,集料细度增加和集料体积分数增大都会使大尺度邻近集料表面最近间距出现的概率减小、小尺度邻近集料表面最近间距出现的概率增加,且峰值概率的位置向小间距方向偏移。另外,邻近集料表面最近间距的分区段累计概率结果分析表明,3种模型砂浆结构的邻近集料表面最近间距分布的57%以上小于10μm。最后,邻近集料表面最近间距的平均值的分析结果显示,当集料体积分数在40%~70%之间变化时,邻近集料表面最近间距的平均值在54.6~1.1μm之间变化;当砂浆中集料的体积分数在50%~70%之间变化时,邻近集料表面最近间距的平均值与集料的体积分数基本上呈线性关系;单位砂浆体积下集料的表面积的变化对邻近集料表面最近间距的平均值有影响,但二者之间的比值并非常数。
The SPACE system with dynamic mixing and compactness of particles was used to generate mortar structure with high aggregate volume fraction model. Therefore, taking the model mortar with one of the three kinds of fine aggregate particle size distribution (one size range of 0.125 ~ 1.34mm and the other two size range of 0.25 ~ 5.00mm) as an example, Degree and Aggregate Volume Fraction (φ = 40% ~ 70%) on the Distribution of Nearest Aggregate Surface Spacing. The results show that the increase of the aggregate fineness and the increase of the aggregate volume fraction will decrease the probability of the nearest neighbor of the large-scale adjacent aggregate surface, and the probability of the nearest neighbor of the small-scale adjacent aggregate surface increases, and the location of the peak probability Small pitch offset. In addition, the results of the cumulative probability of sub-sections close to the nearest aggregate surface show that the closest distance between the adjacent aggregate surfaces of the three model mortar structures is more than 57% less than 10μm. Finally, the analysis of the average value of the nearest neighbor of the aggregate surface shows that when the aggregate volume fraction varies from 40% to 70%, the average value of the nearest neighbor surface of the adjacent aggregate varies from 54.6 to 1.1 μm. When the volume fraction of aggregates in the mortar varies between 50% and 70%, the average value of the nearest spacing of adjacent aggregates is basically linear with the volume fraction of aggregates; the change of surface area of aggregates per unit volume of mortar There is an effect on the average value of the nearest spacing of adjacent aggregates, but the ratio between them is not constant.