Experimental study of energy evolution ofcoarse-grained red sandstone soil under static loading conditions

To study energy evolution of coarse-grained red sandstone soil under static loading conditions, static load compaction tests were conducted by using an electronic universal testing machine. Stress-displacement relations of coarse-grained red sandstone soil were obtained and the effects of moisture content and compaction energy on compaction property were analyzed. The results show that under the same compaction energy, when the moisture content is 8.3 %, the soil gets largest displacement; the relationship between unit-volume static compaction work and dry density can be described as logarithm relation; the essence of static compaction of soil is extruding soil gas, not squeezing out the moisture from the soil; the general moisture content has an adverse effect on the compaction of soil.