SRX稳定碎石骨架密实级配及路用性能

发布时间：2018-02-10 12:47

  本文关键词： 道路工程 SRX稳定碎石 级配 垂直振动成型方法　出处：《建筑材料学报》2017年02期 　论文类型：期刊论文

【摘要】：基于垂直振动成型方法(VVCM)研究了粗集料级配对其振实密度的影响,细集料级配对有机高分子聚合物SRX稳定细集料抗压强度的影响,粗、细集料质量比及关键筛孔通过率对SRX稳定碎石抗压强度的影响,以抗压强度最大为原则提出了SRX稳定碎石骨架密实级配,并验证了其路用性能.结果表明:当粒径为19~37.5mm,9.5~19mm,4.75~9.5mm的粗集料质量比为48∶30∶22时,混合粗集料振实密度最大;当筛孔通过率的递减系数I=0.65时,SRX稳定细集料抗压强度最大;当粗、细集料质量比为65∶35时,SRX稳定碎石抗压强度最大;当关键筛孔31.5,19,9.5,4.75,2.36,0.6,0.075mm通过率分别为95.0%~100.0%,64.0%~71.0%,44.0%~52.0%,32.0%~40.0%,22.0%~29.0%,11.0%~18.0%和5.0%~11.0%时,SRX稳定碎石抗压强度最大;与规范级配和水泥碎石级配相比,骨架密实级配SRX稳定碎石抗压强度、劈裂强度至少可分别提高13%和19%.
[Abstract]:Based on the vertical vibration molding method, the influence of coarse aggregate gradation on its vibrational density and the effect of fine aggregate gradation on the compressive strength of organic polymer SRX stabilized fine aggregate were studied. The effect of the mass ratio of fine aggregate and the pass rate of key sieve holes on the compressive strength of SRX stabilized macadam was studied. Based on the principle of maximum compressive strength, the dense gradation of SRX stabilized macadam framework was put forward. The results show that when the mass ratio of coarse aggregate is 48: 30: 22, when the coarse aggregate mass ratio is 48: 30: 22, the maximum vibrational density of mixed coarse aggregate is obtained, and the maximum compressive strength of SRX stabilized fine aggregate is obtained when the decreasing coefficient of pass ratio of sieve hole is Ig 0.65, and when the mass ratio of coarse aggregate is 48: 30: 22, the SRX stabilized fine aggregate has the highest compressive strength. When the mass ratio of fine aggregates is 65: 35, the compressive strength of SRX stabilized macadam is the highest; when the key sieve hole is 31.5199.752.750.36 / 2.36.0.60.75mm, the passing rate is 95.00.0100.0100.0100.0100.0100.052.032.040.052.029.011.0% and 5.0- 11.0mm respectively. Compared with the standard grade and cement crushed stone grade, the SRX stabilized crushed stone has the highest compressive strength. The compressive strength and splitting strength of SRX stabilized macadam with dense gradation of skeleton can be increased by at least 13% and 19, respectively.
【作者单位】： 长安大学特殊地区公路工程教育部重点实验室;金华市公路管理局;
【基金】：浙江交通科技项目(2013H18)
【分类号】：U414
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本文编号：1500548