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<p>This study presents back-analyses from full-scale road test sections constructed using unreinforced and geocell-reinforced layers and subjected to in-situ deflection tests. The field-testing program was conducted on a 40-m-long test track during the construction of an access road in an industrial facility. An unbound aggregate was adopted for the construction of the subbase and base layers of the pavement structure, with some sections reinforced using two different types of geocell. The field-testing program included a total of 270 Benkelman Beam Tests (BBT), conducted in each of the layers of five different test sections. The test results were used to back-calculate the elastic moduli of the unreinforced and reinforced layers in the different test sections. This allowed for determining the Modulus Improvement Factor (MIF) corresponding to the geocell reinforcements, as well as situating the experimental results within a broader set of literature data to evaluate the accuracy and applicability of an analytical methodology for predicting MIF. The results showed a significant improvement in the elastic modulus of the aggregate layers when using geocell reinforcement, with MIF values ranging from 2.1 to 2.5 depending on the geocell pocket size. The analytical method was found to adequately predict the MIF values, confirming its potential applicability in the design of pavement layers reinforced with geocells.</p>

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Experimental and Analytical Evaluation of Elastic Modulus and MIF in geocell-reinforced Granular Layers Using Benkelman Beam Tests

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • J. O. Avesani Neto,
  • M. P. Albuquerque,
  • M. C. I. Pérez,
  • J. G. Zornberg

摘要

This study presents back-analyses from full-scale road test sections constructed using unreinforced and geocell-reinforced layers and subjected to in-situ deflection tests. The field-testing program was conducted on a 40-m-long test track during the construction of an access road in an industrial facility. An unbound aggregate was adopted for the construction of the subbase and base layers of the pavement structure, with some sections reinforced using two different types of geocell. The field-testing program included a total of 270 Benkelman Beam Tests (BBT), conducted in each of the layers of five different test sections. The test results were used to back-calculate the elastic moduli of the unreinforced and reinforced layers in the different test sections. This allowed for determining the Modulus Improvement Factor (MIF) corresponding to the geocell reinforcements, as well as situating the experimental results within a broader set of literature data to evaluate the accuracy and applicability of an analytical methodology for predicting MIF. The results showed a significant improvement in the elastic modulus of the aggregate layers when using geocell reinforcement, with MIF values ranging from 2.1 to 2.5 depending on the geocell pocket size. The analytical method was found to adequately predict the MIF values, confirming its potential applicability in the design of pavement layers reinforced with geocells.