Journal of Shandong University(Engineering Science) ›› 2018, Vol. 48 ›› Issue (5): 118-123.doi: 10.6040/j.issn.1672-3961.0.2017.487

• Civil Engineering • Previous Articles     Next Articles

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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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

CLC Number: 

  • U414

Table 1

Properties of tire derived aggregates"

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

Fig.1

Grading curveof weathered rock materials"

Fig.2

Compaction curve of weathered rock materials"

Table 2

Factors for compaction test and equipment"

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

Table 3

Designations of compaction tests"

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

Fig.3

Compaction curves of mixtures at various TDA contents"

Fig.4

Relations of TDA content vs. dry density formixtures"

Fig.5

Relations of TDA content vs.optimum water content for mixtures"

Table 4

Compaction parameters of mixtures"

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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