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为探讨采用旋转成型法(gyratory compation,GCM)进行水泥稳定碎石组成设计的可行性,分析旋转与静压成型方法(static compaction method,SCM)对水泥稳定碎石(cement stabilizedmacadam mixtures,CSMM)性能的影响,采用旋转压实、静压方法成型3种不同结构类型的水泥稳定碎石混合料试件,测试、比较不同成型方法所得混合料试件的物理力学指标,并与振动成型、现场取芯所得结果进行比较。研究结果表明:成型方法是影响水泥稳定碎石混合料性能的关键因素,采用旋转成型法能够得到混合料的干密度-含水率单峰曲线,从而确定最佳含水率和最大干密度;与重型击实相比,旋转成型试件的最佳含水率平均低6.7%,最大干密度平均高2.0%;与静压成型相比,旋转成型试件的7d无侧限抗压强度、28d劈裂强度平均高出117%、106%;旋转成型试件粗集料形成的骨架结构具有更高的抗荷载能力,且破碎程度低,粗细集料在成型过程中能够达到更好的嵌挤状态;旋转成型骨架密实结构水泥稳定碎石与其他结构类型相比具有最佳的物理力学性能;旋转成型试件的物理力学指标与静压成型试件存在线性关系。室内旋转成型混合料试件的7d无侧限抗压强度强度、集料分布破碎情况与振动成型和试验路更为接近;采用旋转成型法进行水泥稳定碎石混合料组成设计是合理可行的。
In order to discuss the feasibility of using GCM to design the cement stabilized aggregate, the influence of the static compaction method (SCM) on the properties of cement stabilized macadam (CSMM) , Three types of cement stabilized aggregate samples with different types of structures were formed by rotary compaction and static pressure method. The physical and mechanical indexes of the mixture samples obtained by different molding methods were compared with those of vibration molding. Core results obtained for comparison. The results show that the molding method is the key factor that affects the performance of cement-stabilized macadam mixes. The dry-density-moisture single peak curve of the mixture can be obtained by rotary molding method to determine the optimum moisture content and the maximum dry density. Compared with the hydrostatic compaction, the optimal moisture content of the rotatively formed specimens was 6.7% lower on average and the maximum dry density was 2.0% higher on average. Comparing with the hydrostatic compaction, the unconfined compressive strength at 7d and 28d The average strength of the sample is 117% and 106% higher than that of the original sample. The skeleton structure formed by the coarse aggregate of the rotating mold specimen has a higher anti-load capacity and a lower degree of crushing. The thick aggregate can achieve a better intrusion state during the forming process. Compared with other types of structures, the rotationally-molded skeleton compact structure of cement-stabilized macadam has the best physical and mechanical properties. The physical and mechanical indexes of the rotational molded specimens have a linear relationship with the hydrostatic specimens. The strength of unconfined compressive strength of 7d rotational mixing compound specimen is close to that of vibration molding and test road. The design of cement stabilized aggregate is feasible and feasible by the rotary forming method.