The weathered red sandstone soil is seen with extreme strength reduction after encountering water. With an aim to evaluate the long-term stability of the weathered red sandstone soil as the roadbed filler, laboratory experiments are carried out for soil stabilised with cement dosages of 0%, 3%, 4%, and 5%, respectively. Meanwhile, the compressive rebound modulus and the unconfined compressive strength of the cement-stabilised soil are measured after 0–7 cycles of wetting and drying, respectively. Besides, scanning electron microscope (SEM) is used to observation and quantitative analyse. The testing results shows that the strength attenuation laws of stabilised soils with different cement dosages after wetting and drying cycles. Moreover, this study proposes the technical standard for cement-stabilised red sandstone soil used as roadbed filler.

风化的红砂岩土壤遇水后强度极度降低。为了评估风化红砂岩土作为路基填料的长期稳定性，分别对水泥用量为0%、3%、4%和5%的土壤进行了室内试验。同时，分别在 0-7 个干湿循环后测量了水泥稳定土的压缩回弹模量和无侧限抗压强度。此外，扫描电子显微镜（SEM）用于观察和定量分析。试验结果表明，不同水泥用量的稳定土在干湿循环后强度衰减规律。此外，本研究提出了水泥稳定红砂岩土作为路基填料的技术标准。