摘要
为探究磷石膏制备基层材料的工程适用性,优化配比,通过室内试验和现场实践相结合的方法分析了改性磷石膏基层和磷石膏-水泥稳定碎石基层的路用性能.结果表明:①改性磷石膏基层的强度与水泥掺量正相关,但固化体的强度形成较为缓慢,当水泥掺量控制在7%~10%时可以较好地兼顾经济性和路用性能.②骨料的加入使得磷石膏-水泥稳定碎石层更易于被压实,基层强度和刚度也得到了显著提升,28 d抗压强度可以达到7 MPa.③磷石膏-水泥稳定碎石层的刚度较大,属于典型的半刚性基层,其28 d抗压强度与碎石掺量相关性不大,但较高的碎石比例能够产生更高的早期强度.
In order to explore the engineering applicability of phosphogypsum to prepare base materials and optimize the mixture ratio,the road performance of modified phosphogypsum base and phosphogypsum-cement stabilized macadam base was analyzed by combining indoor test and field practice.The results show that:①the strength of the modified phosphogypsum base is positively related to the cement parameters,but the strength of the solidified body is formed slowly,and when the cement parameters are controlled between 7%and 10%,the economy and road performance can be well considered.②The addition of aggregate makes the phosphogypsum-cement stabilized macadam layer easier to be compacted,and the strength and stiffness of the base are also significantly improved,and the 28 d compressive strength can reach 7 MPa.③The phosphogypsum-cement stabilized macadam layer is a typical semi-rigid base with high stiffness,and its 28 d compressive strength has little correlation with macadam parameters,but a higher proportion of macadam can produce higher early strength.
作者
程树范
曾卫新
殷源
杨春
郝才平
CHENG Shufan;ZENG Weixin;YIN Yuan;YANG Chun;HAO Caiping(Hubei Province Road and Bridge Co.Ltd.,Wuhan 430056,China;Hubei Ruida Scientific Research&Testing Co.Ltd.,Wuhan 430056,China)
出处
《武汉理工大学学报(交通科学与工程版)》
2025年第6期1306-1310,共5页
Journal of Wuhan University of Technology(Transportation Science & Engineering)
基金
国家自然科学基金项目(51878521,42107175,12172280)。
关键词
固废综合利用
路面基层填料
改性磷石膏
磷石膏-水泥稳定碎石
路用性能
solid waste comprehensive utilization
road course filler
cement-modified phosphogypsum(CMP)
phosphogypsum-cement stabilized gravel(PCG)
pavement performance
