土工基础

›› 2018, Vol. 32 ›› Issue (6): 668-671.

• 工程实录 • 上一篇    下一篇

花岗岩大粒径级配碎石试验方法

郭志国,谭  波,岳爱军   

  1. （桂林理工大学,广西桂林 541004）
  • 收稿日期:2018-03-09 修回日期:2018-03-26 出版日期:2018-12-20 发布日期:2018-12-21
  • 作者简介:郭志国（1992-），男，硕士研究生，研究方向为岩土工程。

Testing of the Large Size Granite Gravel Gradation Selections

GUO Zhiguo, TAN Bo， YUE Aijun   

  1. (Guilin University of Technology, Guilin 541004)
  • Received:2018-03-09 Revised:2018-03-26 Online:2018-12-20 Published:2018-12-21

摘要： 由粒子间的干涉理论与泰波法，初拟级配组成，采用重型击实、振动台振动、人工捣实的成型方法，以试件的最大干密度、最佳含水率为目标，寻求最大公称粒径为53mm的花岗岩级配碎石试件的成型方法。试验结果表明，花岗岩大粒径级配碎石主骨料D0（26.5～53mm）:D1(4.75～26.5mm)=6:4,泰波指数n=0.5级配设计最为合理；击实试样在含水率4.2%取得最大干密度2.327g/cm3，是振动最大密度的1.034倍，捣实最大密度的1.12倍；击实成型试样级配组成（0～4.75mm）含量改变6.8%，是振动成型的1.19倍，捣实成型的1.097倍；试样干密度越大力学性能越好。

关键词: 级配组成, 成型方法, 花岗岩, 大粒径级配碎石, 力学性能

Abstract: The optimized coarse granite aggregate gradation selection tests were performed using interference of particles and Talbol’s theory through three different compaction methods: heavy compaction, vibratory table, and hand compaction. The objective of the testing was to obtain the optimized gradation of granite aggregates with a maximum grain size of 53mm. The results indicate that optimized gradation should have the ratio of the main grain size D0 (26.55～53mm) : D1 (4.74 ～26.5 mm) = 6:4 and a Talbol Index n =0.5. Under a moisture content of 4.2%, the maximum dry density of 2.327 g/cm3 can be achieved by the heavy compaction method. This dry density is 1.037 time of the dry density prepared by vibratory table and 1.12 time that of prepared by hand compaction. The content of grain sizes between 04.75 mm has 6.8% change under heavy compaction method. This content is 1.19 times that of prepared by the vibratory table method and 1.097 times that of prepared by the hand compaction method. Higher dry density has better mechanical properties.

Key words: Gradation, Sample Preparation Method, Granite Aggregates, Largesize Aggregates, Mechanical Properties