Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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A Feasibility Study of Wood-plastic Composite Paver Block for Basic Rest Areas

  • Yang, Sungchul (School of Architectural Engineering, College of Science and Technology, Hongik University)
  • Received : 2018.10.18
  • Accepted : 2018.12.27
  • Published : 2019.01.25
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Abstract

A wood-plastic composite (WPC) paver block was manufactured using wood chips waste through an extrusion process, and it was intended to be used for paving in basic rest areas. The first stage in this study covered preliminary tests in terms of flexural strength and dimensional swelling to determine the optimal WPC compounding mix condition, by variation of the WPC ingredients. Next, three different paver blocks including the WPC block, a non-porous cement block, and a porous cement block were tested in terms of various material properties in the laboratory. Finally, two outdoor test sections of the proposed paver blocks were prepared to simulate a basic rest area. Test results indicated that the flexural strength of the WPC paver blocks was about 1.6 times greater than that of the tested cement paver blocks. The WPC block pavement was unaffected by water buoyance as well as volume expansion due to swelling. Results from the impact absorbance test and light falling weight deflectometer (LFWD) test clearly showed that the WPC block paving system marginally satisfied the comfortable and safe hardness range from the pedestrians' perspective, while the results demonstrated that it is structurally sound for application as a road paving block.

Keywords

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Fig. 1. Compounding with woodchip, PE and additives.

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Fig. 2. WPC blocks varnished with oil.

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Fig. 3. Measurement of Impact absorbance test.

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Fig. 4. Light falling weight deflectometer testing apparatus.

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Fig. 5. Flexural strength test for wood block.

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Fig. 6. Flexural strength test results from the preliminary test.

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Fig. 7. Samples before and after water absorption and dimensional swelling test.

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Fig. 8. Density results.

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Fig. 9. Water absorption test results.

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Fig. 11. Cross sectional layouts of test sections (#1 and #2)

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Fig. 10. Dimensional swelling test results.

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Fig. 12. Photo view of two test sections.

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Fig. 13. Flexural strength and relative flexural strength values of diverse block pavements.

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Fig. 14. Water absorption test results.

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Fig. 15. Dimensional swelling change test results.

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Fig. 16. Impact absorbance test results of diverse block pavements by a golf ball test.

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Fig. 17. Elastic modulus values of various block pavements determined by LFWD at two test sections.

Table 1. Various compounding proportions of WPC for preliminary test

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Table 2. Flexural strength test results of paving blocks

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