基于振动成型的水泥稳定碎石抗压强度影响因素分析

Analysis on Influencing Factors of Compressive Strength for Cement Stabilized Macadam Based on Vibration Forming Test

为研究振动法成型水泥稳定碎石试件取代静压法的可行性,通过无侧限抗压强度试验测试了振动法成型试件的力学性能,分析讨论了相关影响因素,并通过与静压法及实际工程钻芯取样进行对比,分析了水泥稳定碎石振动成型的优势。结果发现,在提高水泥剂量的基础上,较长的振动时间能够提升水泥稳定碎石的抗压强度;同样的养生时间下,较长振动时间下形成的水泥稳定碎石的抗压强度较大;静压成型试件的抗压强度显著低于实际工程,而振动法成型试件的强度与实际工程较为接近。

In order to study the feasibility of substituting static pressure method by vibration method for fabricating cement stabilized macadam specimens,mechanical properties of specimens fabricated using vibration method were evaluated by the means of unconfined compressive strength test.What is more,the advantage of vibration method for cement stabilized macadam was analyzed by comparing static pressure method and drilling in practice.The results show that the compressive strength of cement stabilized macadam can be improved by longer vibration time on the basis of increasing cement dosage.The compressive strength of cement stabilized macadam formed under longer vibration time is higher for the same curing time.After comparison,the compressive strength of the specimens formed by static pressure is significantly lower than that of the actual project,while the strength of the specimens formed by vibration method is close to that of the actual project.