Dai Di, Peng Jie, Bai Lanlan, Li Gang, Lin Hongmin
Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China.
JSTI Group, Nanjing 210019, China.
Polymers (Basel). 2022 Feb 25;14(5):929. doi: 10.3390/polym14050929.
In road construction, a large number of excavated soils need to be treated with stabilizers. The addition of superabsorbent polymer (SAP) can improve the road performance of these stabilized soils. In order to predict roadbed deformation, dynamic triaxial tests were carried out on cemented soil containing SAP to investigate its resilient and plastic strain behavior. The effects of SAP content, cyclic stress ratio, and loading frequency on cement-stabilized soils with SAP were analyzed combined with the number of cycles. This study demonstrates how these influencing factors effect the resilient strain, dynamic elastic modulus, and accumulated plastic strain, which are crucial to better understanding the strain behavior of cement-stabilized soil with SAP. The results show that SAP can significantly improve the brittle failure characteristics and dynamic strength of cement-stabilized soil. Soil with higher SAP content possesses smaller accumulated plastic strain; with the increase in the cyclic stress ratio, the dynamic elastic modulus decreases significantly, whereas the accumulated plastic strain has the opposite trend. In addition, the lower frequency produces larger cumulative axial strain.
在道路建设中，大量挖掘出的土壤需要用稳定剂进行处理。添加高吸水性聚合物（SAP）可以改善这些稳定土的道路性能。为了预测路基变形，对含SAP的水泥土进行了动三轴试验，以研究其弹性和塑性应变行为。结合循环次数，分析了SAP含量、循环应力比和加载频率对含SAP水泥稳定土的影响。本研究展示了这些影响因素如何影响弹性应变、动弹性模量和累积塑性应变，这对于更好地理解含SAP水泥稳定土的应变行为至关重要。结果表明，SAP能显著改善水泥稳定土的脆性破坏特性和动强度。SAP含量较高的土具有较小的累积塑性应变；随着循环应力比的增加，动弹性模量显著降低，而累积塑性应变则呈相反趋势。此外，较低的频率会产生较大的累积轴向应变。
