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<p>California bearing ratio (CBR) testing was performed for 28 samples of base courses with different types and locations of geogrid to determine the effects of geogrid reinforcement. Three types of geogrids were used in this study: type A, type B, and type C. Section f of type A contained a sample with three layers of geogrid, resulting in a higher CBR value compared to section c, which contained a sample with two layers of geogrid. An analysis of variance (ANOVA) was performed on the replicates for each geogrid type to evaluate experimental consistency. The results from the ANOVA test in this study, which compared California bearing ratio (CBR) values of samples with different types and setups of geogrids, showed that there were no significant differences between the average values of the samples (<i>p</i> &gt; 0.05 for all geogrids), confirming that the experiment was accurate and reliable. The structural effect of geogrid reinforcement was evaluated using the 1993 AASHTO flexible pavement design guide. This assessment back-calculated the structure layer coefficient of reinforced base courses for each test section and concluded that section f achieved the highest traffic benefit ratio (TBR)&#xa0;and base course reduction (BCR)&#xa0;values. Results demonstrated that the reduction in the base course ranges between 0.87 and 18.79, based on the type of geogrid. The base course structural layer coefficient increased from 0.88 to 23.13%.</p>

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Experimental Evaluation and Quantification of Geogrid-Reinforced Base Course Materials for Flexible Pavements

  • 期刊论文

  • 发表日期：

    2025年8月12日

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  • Shadi Hanandeh,
  • Saad Abo-Qudais,
  • Ibrahim Khliefat,
  • Ruba Al-Kharabsheh

摘要

California bearing ratio (CBR) testing was performed for 28 samples of base courses with different types and locations of geogrid to determine the effects of geogrid reinforcement. Three types of geogrids were used in this study: type A, type B, and type C. Section f of type A contained a sample with three layers of geogrid, resulting in a higher CBR value compared to section c, which contained a sample with two layers of geogrid. An analysis of variance (ANOVA) was performed on the replicates for each geogrid type to evaluate experimental consistency. The results from the ANOVA test in this study, which compared California bearing ratio (CBR) values of samples with different types and setups of geogrids, showed that there were no significant differences between the average values of the samples (p > 0.05 for all geogrids), confirming that the experiment was accurate and reliable. The structural effect of geogrid reinforcement was evaluated using the 1993 AASHTO flexible pavement design guide. This assessment back-calculated the structure layer coefficient of reinforced base courses for each test section and concluded that section f achieved the highest traffic benefit ratio (TBR) and base course reduction (BCR) values. Results demonstrated that the reduction in the base course ranges between 0.87 and 18.79, based on the type of geogrid. The base course structural layer coefficient increased from 0.88 to 23.13%.