在击数一定时，当含水率较低时，击实后的干密度随着含水率的增加而增大；而当含水率达到某一值时，干密度达到最大值，此时含水率继续增加反而招致干密度的减小。干密度的这一最大值称为最大干密度，与它对应的含水率称为最优含水率。
最大干密度 [水文] maximum dry density ; maximum dry unit weight
By the method of surface vibrating compaction of the laboratory testing,this paper analyzes the factor influencing the maximum dry density of soil-agggregate mixture of airslake(weathering)sandstone,mudstone and lime.
基于表面振动台法的试验条件参数对风化砂岩、泥岩的混合料和石灰岩材料两种不同性质土石混合料最大干密度的影响因素进行室内系统试验研究。
参考来源 - 土石混合料振动击实特性的试验研究This text beginning with the physical property of loess analyzes and studies the pellet form and its main characteristics, discusses the method of confirming the biggest dry density. According to the heavy compact experiment, draw the compacted curve.
本文从黄土的机械物理性质入手,分析研究了黄土材料的颗粒组成和主要特点,讨论了黄土最大干密度的确定方法,通过重型击实试验绘制了黄土击实特性曲线。
参考来源 - 黄土压实机理研究Research therules of change about optimum water content, maximum dry density, strength, none pressure expansion, swelling force and elasticity modulus of improved expansive soil adapted to different times of cycle loading.
研究了天然膨胀土和石灰改良土的最优含水率、最大干密度变化规律，无侧限抗压强度的变化规律，无荷膨胀率、膨胀力的变化规律以及改良膨胀土弹性模量随循环加载次数的变化规律。
参考来源 - 石灰改良膨胀土室内试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
最大干密度是确定填石料压实质量的一个主要指标。
The maximum dry density is a mainly index of compaction quality for rockfill material.
为指导施工和控制填土质量，研究了最大干密度试验方法。
For guidance of construction and assurance of quality of soil compaction, a study was performed on the test method for the maximum dry density.
本文通过击实试验，确定了风积沙的最佳含水量和最大干密度。
In the paper, through the compaction test, the optimum moisture content and maximal dry density of aeolian sand are determined.
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