Abstract
To study the influences of curing period and sulfate concentration on the dynamic mechanical properties of cement soil, this study used a split Hopkinson pressure bar device. Impact tests were conducted on cement soil specimens with different curing periods and different sulfate concentrations. The relationships between the dynamic stress–strain, dynamic compressive strength, and absorption energy of these cement soil specimens were analyzed. The test results show that with continuous loading, cement soil specimens mainly experience an elastic stage, plastic stage, and failure stage; with increasing curing period and sulfate concentration, the dynamic compressive strength and absorption energy of cement soil specimens follow a trend of first increasing and then decreasing. The dynamic compressive strength and absorption energy of cement soil specimens reached maximum values at a curing period of 14 d and a Na2SO4 solution concentration of 9.0 g/L. Increasing the dynamic compressive strength and absorption energy can effectively improve the ability of cement soil specimens to resist damage. This paper provides a practical reference for the application of cement soil in dynamic environments.
Highlights
Cement soil, which is widely used in engineering construction applications, is a composite material with a certain strength formed by uniformly mixing a specific proportion of soil, cement, and water [1,2]
The results showed that with increasing numbers of dry–wet cycles, both the compressive strength and tensile strength of specimens increased first and decreased; mechanical strength could be effectively improved by adding a specific amount of basalt fibers to specimens
The results showed that adding the appropriate amount of basalt fibers improves the compressive, frost-resistance, and fatigueresistance properties of cement soil
Summary
Cement soil, which is widely used in engineering construction applications, is a composite material with a certain strength formed by uniformly mixing a specific proportion of soil, cement, and water [1,2]. The microstructure and mineral composition of the cement soil specimens were analyzed by scanning electron microscope tests and X-ray diffraction tests to study the effects of the changes in the internal substance composition of the specimens on their dynamic mechanical properties after sulfate erosion. To gain a clearer understanding of the changes in the internal structure and material composition of cement soil specimens exposed to different environments, samples of cement soil specimens were separately soaked in water and sulfate solution. Cement soil specimens, eroded by different curing periods and different concentrations of Na2SO4 solution, were subjected to dynamic impact tests and the original waveform diagrams were obtained. Cement soil specimens, eroded by different curing periods and different concentrations of Na2SO4 solution, were subjected to dynamic impact tests and the original w6aovfe form diagrams were obtained.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
