振动法微粘结级配碎石矿料级配与性能研究.pdfVIP

学兔兔 公路交通技术 2015年8月 第4期 Technology of Highway and Transport Aug．2015 No．4 DOI：10．13607／j．cnki．gljt．2015．04．001 振动法微粘结级配碎石矿料级配与性能研究 董树国 (承德市公路工程管理处，河北 承德 067000) 摘 要：在分析级配碎石粗集料骨架组成的基础上，采用振动压实仪进行室内CBR试验，以研究细集料含量对级配 碎石承载特性的影响规律，并优化得出骨架密实型级配碎石的矿料级配组成。另外，采用振动成型方式对不同结构 类型微粘结级配碎石性能进行对比试验。试验结果表明：微粘结级配碎石的内部结构类型对其性能有重要影响，与 悬浮密实结构相比，骨架密实结构微粘结级配碎石的抗压强度与抗压回弹模量更优，而抗弯拉性能略差。 关键词：振动成型；微粘结级配碎石；级配；性能 文章编号：1009—6477(2015)04—0001—05 中图分类号：U414 文献标识码：A Research on Grading and Performance of Microbond Grading Gravel Mineral Aggregate in Vibration Method DONG Shuguo Abstract：On the basis of analyzing composition of skeleton of grading gravel coarse aggregate，this paper carries out indoor test by means of vibration compaction meter to research the rule of influences of fine aggregate Off bearing characteristics of grading gravel and to optimize composition of the resulting mineral aggregate grading of dense skeleton type grading grave1．In addition，the paper adopts vibration molding method to conduct comparative test of the performance of microbond grading gravel of different structure types．The test results show that the interior structure types of microbond grading gravel exhibit important influences on its performance，and in comparison with suspension dense structure，the compressive strength and compressive elastic modulus of microbond grading gravel in skeleton dense structure are more superior，but the bending／stretching resistance is not as good． Key words：vibration molding；microbond grading gravel；grading；performance 微粘结级配碎石是由少量(≤3％)水泥、级配 配混合料力学性能有很大差异，因此，该级配范围用 碎石和水组成的一种复合材料