Shear Characteristics of Compacted Marble Waste Powder under the Influence of Multiple Factors
In order to understand the shear properties of marble waste powder in more detail,the marble waste powder was prepared as specimens with different moisture content(14.6％,20％,23.8％)and different compaction work(2 013.7,2 684.9,3 356.2 kJ·m-3)through the percussion test to perform the triaxial consolidation undrained shear test.The results de-scribe the trend of shear strength change of marble waste powder with the change of damage form in shear process.The test results show that the maximum dry density of the marble waste powder becomes larger and the optimum moisture content decreases with the increase of the compaction work.In the case of 14.6％moisture content with compaction work from 75％to 100％and 125％,the ultimate partial stress of the specimens increased by 12.99％and 57.94％.The ultimate partial stress of the specimens increases as the moisture content of the specimens gets closer to its optimum moisture content.Compared to the optimum moisture content,the ultimate partial stress decreased by 18.54％for the dry-side moisture content case and by 3.98％for the wet-side moisture content case.The damage of the specimens was in the form of shear shrinkage followed by shear expansion under low circumferential pressure condi-tions.Changing the moisture content and the compaction work will affect the original degree of consolidation of the marble waste powder to a certain extent,resulting in a change in the form of damage to sustained shear shrinkage.
万方数据
维普
