The Effect of Joint Width on the Performance of Interlocking Block Pavements
Publication: Geo-Congress 2023
ABSTRACT
Interlocking block pavement (IBP) consists of discrete blocks, joint and bedding sands, base, and subbase. Among others, joint sand plays an important role in the overall performance of an IBP, because it facilitates the load transfer between the blocks. Previously, researchers have performed IBP model test in order to determine the appropriate joint width. The proposed value, however, varies depending on the researchers because the geotechnical information (relative density and shear strength) of the joint sands is often neglected and not clearly defined. Therefore, in this study, a laboratory block pavement test was carried out by varying the joint width while considering the geotechnical properties of the paving materials. In addition, the model test was conducted in a newly designed 2D model chamber which enables particle image velocimetry (PIV) analysis. The test results show that the IBP settlement resistance and load dispersion ability are greater for IBPs with narrow joint widths owing to their higher load transfer efficiency (LTE).
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Geo-Congress 2023
Pages: 366 - 376
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Published online: Mar 23, 2023
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