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山东大学学报 (工学版) ›› 2018, Vol. 48 ›› Issue (5): 118-123.doi: 10.6040/j.issn.1672-3961.0.2017.487

• 土木工程 • 上一篇    下一篇

废旧轮胎片体-风化料混合物压实特性的试验研究

张磊1(),肖溟1,王磊1,崔新壮2,*(),孙连勇3,黄丹1,苏俊伟1   

  1. 1. 山东大学土建与水利学院，山东 济南 250061
    2. 山东大学深圳研究院，广东 深圳 518057
    3. 济南轨道交通集团有限公司，山东 济南 250101
  • 收稿日期:2017-10-08 出版日期:2018-10-01 发布日期:2017-10-08
  • 通讯作者: 崔新壮 E-mail:837827723@qq.com;cuixz@sdu.edu.cn
  • 作者简介:张磊(1991—)，男，山东菏泽人，硕士研究生，主要研究方向为道路工程. E-mail: 837827723@qq.com
  • 基金资助:
    国家自然科学基金资助项目(51379115);国家自然科学基金资助项目(51579140);深圳市科技计划资助项目(JCYJ20160429183630760);山东省住房城乡建设科技计划项目(2017-R1-025)

Experimental study on compaction properties of tire derived aggregate-weathered rock material mixtures

Lei ZHANG1(),Ming XIAO1,Lei WANG1,Xinzhuang CUI2,*(),Lianyong SUN3,Dan HUANG1,Junwei SU1   

  1. 1. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China
    2. Shenzhen Research Institute, Shandong University, Shenzhen 518057, Guangdong, China
    3. Jinan Rail Transit Group, Jinan 250101, Shandong, China
  • Received:2017-10-08 Online:2018-10-01 Published:2017-10-08
  • Contact: Xinzhuang CUI E-mail:837827723@qq.com;cuixz@sdu.edu.cn
  • Supported by:
    国家自然科学基金资助项目(51379115);国家自然科学基金资助项目(51579140);深圳市科技计划资助项目(JCYJ20160429183630760);山东省住房城乡建设科技计划项目(2017-R1-025)

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摘要：

为了推进废旧轮胎在土木工程中的应用，选择废旧轮胎片体(tire derived aggregates, TDA)与分布广且价格低的风化料混合形成混合料，并用TDA在混合料中以0~60%的掺量，通过大尺寸击实设备开展重型击实试验，研究废旧轮胎片体-风化料混合物的压实特性。试验结果表明，混合料的击实曲线与纯风化料的击实曲线有明显差异，增加废旧轮胎片体的掺量能够有效减小混合料的最大干密度，能减小混合料的最优含水率，废旧轮胎片体-风化料混合物是一种性能优良的轻质填料。根据室内试验结果，TDA掺量为20%时，混合料的最大干密度和最优含水率分别为1.865 g/cm3和6.25%；TDA掺量为40%时，混合料的最大干密度和最优含水率分别为1.600 g/cm3和4.90%，给出了不同掺量混合料击实指标建议值供设计参考。

关键词: 废旧轮胎片体, 风化料, 压实特性

Abstract:

To promote the usage of scrap tires in civil engineering, the 0~60%content of tire derived aggregates by weight were mixed with widely distributed and low price weathered rock materials, and the compaction properties of tire derived aggregate-weathered rock material mixtures were studied based on heavy compaction tests performed by the large size compaction equipment. The experimental results showed that the compaction curves of mixtures were obviously different from that of pure weathered rock materials. As the content of tire derived aggregates increased, the maximum dry density of mixtures effectively decreased and the optimum water content of mixtures reduced. Tire derived aggregate-weathered rock material mixtures could be used as the lightweight backfill with good properties. According to the results of laboratory tests, the maximum dry density and optimum moisture content of mixtures were 1.865 g/cm3 and 6.25% when the TDA content was 20%, and the maximum dry density and the optimum moisture content of mixtures were 1.600 g/cm3 and 4.90% when the TDA content was 40%. Compaction parameters of mixtures could be proposed for design based on laboratory test results.

Key words: tire derived aggregates, weathered rock materials, compaction properties

中图分类号: 

  • U414

表1

废旧轮胎片体参数"

直径/mm 质量分数
%		 平均密度
/(g·cm-3)		 堆积密度/
(g·cm-3)
30~40 14.28
40~50 42.86 1.368 0.486
50~60 42.86

图1

风化料级配曲线"

图2

风化料击实曲线"

表2

击实设备及试验方法参数"

击锤质量/
kg		 击锤底直径/
cm		 落高/
cm		 击实筒尺寸 装土层数 每层击数 单位体积功能/
(kJ·m-3)		 单位面积冲量/
(kN·s·m-2)
直径/cm 高度/cm 体积/cm3
35.2 15 60 30 28.8 20 357 3 88 2 682.9 7

表3

击实试验方案"

试验方案 P/% 风化料含水率/% 混合料含水率/%
1 20 6 4.648
2 20 8 6.438
3 20 10 8.030
4 20 12 9.489
5 20 14 10.814
6 40 6 3.472
7 40 8 4.607
8 40 10 5.717
9 40 12 7.130
10 40 14 7.955
11 60 2 0.805
12 60 4 1.572
13 60 6 2.297
14 60 8 3.048
15 60 10 3.731
16 60 12 4.500
17 60 14 5.157

图3

不同TDA掺量混合料的击实曲线"

图4

TDA掺量与混合料干密度关系"

图5

混合料TDA掺量与最优含水率关系"

表4

压实指标参考值"

掺量/% 最大干密度/(g·cm-3) 最优含水率/%
20 1.865 6.25
40 1.600 4.90
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