不同成型方法对级配碎石的影响
发布时间：2018-10-31 15:41
【摘要】：为进一步了解成型方法对级配碎石性能的影响,本文通过目前两种比较常用的成型方法——击实成型和振动成型两种成型方法的级配碎石,对其做进一步分析研究。首先采用变K法对级配碎石进行级配设计,采用击实成型和振动成型方法分别成型级配碎石试件,然后分别测两种成型方法下的级配碎石试件的最大干密度、最佳含水量以及CBR值等参数,并对比分析测得的两种成型方法的级配碎石参数。分析研究试验数据得知:击实成型对级配碎石原有级配扰动比较大,尤其是对13.2~1.18 mm这几档的级配影响;振动成型对级配碎石原有级配扰动较小,基本保持了级配碎石的原有级配;相同级配条件下,振动成型的CBR值要远高于击实成型的CBR值,振动成型的CBR值是击实成型的CBR值的2倍;并非越密实的级配碎石其CBR值越大。
[Abstract]:In order to further understand the influence of molding methods on the performance of graded crushed stones, this paper makes a further analysis and study on them through two common molding methods: compaction molding and vibration molding. At first, gradation design of graded crushed stone was carried out by variable K method, compaction molding method and vibration molding method were used to form graded crushed stone specimen respectively, and then the maximum dry density of graded crushed stone specimen was measured respectively under two kinds of molding methods. The parameters such as water content and CBR value were compared and analyzed, and the gradation parameters of the two molding methods were compared and analyzed. The experimental data show that compaction molding has great disturbance on the original gradation of graded macadam, especially on the gradation of 13.21.18 mm; Vibration molding has little disturbance on the original gradation of graded macadam and basically keeps the original gradation of graded crushed stone. Under the same gradation condition, the CBR value of vibration molding is much higher than the CBR value of compaction molding, the CBR value of vibration molding is 2 times that of CBR value of compacted molding, but the CBR value of graded crushed stone is not more dense than that of compacted gravel.
【作者单位】： 交通运输部公路科学研究院;东南大学交通学院;
【基金】：国家自然科学基金项目(51178112)
【分类号】：U414
[Abstract]:In order to further understand the influence of molding methods on the performance of graded crushed stones, this paper makes a further analysis and study on them through two common molding methods: compaction molding and vibration molding. At first, gradation design of graded crushed stone was carried out by variable K method, compaction molding method and vibration molding method were used to form graded crushed stone specimen respectively, and then the maximum dry density of graded crushed stone specimen was measured respectively under two kinds of molding methods. The parameters such as water content and CBR value were compared and analyzed, and the gradation parameters of the two molding methods were compared and analyzed. The experimental data show that compaction molding has great disturbance on the original gradation of graded macadam, especially on the gradation of 13.21.18 mm; Vibration molding has little disturbance on the original gradation of graded macadam and basically keeps the original gradation of graded crushed stone. Under the same gradation condition, the CBR value of vibration molding is much higher than the CBR value of compaction molding, the CBR value of vibration molding is 2 times that of CBR value of compacted molding, but the CBR value of graded crushed stone is not more dense than that of compacted gravel.
【作者单位】： 交通运输部公路科学研究院;东南大学交通学院;
【基金】：国家自然科学基金项目(51178112)
【分类号】：U414
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相关期刊论文 前4条
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