Comparing Chemical Stabilizers for Improving Iowa Granular Road Bearing Capacity
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2024-10-25
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Springer, Singapore
Abstract
Granular roads in Iowa are essential for transporting agricultural goods and providing access to isolated regions such as rural homes. Regular maintenance is necessary to ensure the safety and comfort of all types of vehi-cles, including heavy farm and quarry trucks, as well as local residents' cars. The strength and stability of the aggregate layer are critical to the overall per-formance and longevity of the granular roads. This study aims to evaluate the performance of different chemical stabilizers for improving the aggregate lay-er's strength. Limestone was used in the study which is the primary aggregate utilized in Iowa, and three proprietary chemical stabilizers were tested, includ-ing two ionic-based stabilizers and a single enzyme-based stabilizer. Laboratory California Bearing Ratio (CBR) tests were used to measure the strength. The optimized subgrade soil portion that provided the highest CBR value was found to be between 6-8%. The data were analyzed using a two-way Analysis of the Variance (ANOVA) test, which showed that the number of curing days and the type of chemical, as well as their interaction, played a significant role in the CBR value of aggregate materials. Overall, this study highlights the importance of chemical stabilizers in improving the strength of granular roads in Iowa and provides valuable insights for road maintenance and construction.
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This is a manuscript of a proceeding published as Alsheyab, Mohammad Ahmad, Bo Yang, Halil Ceylan, and Sunghwan Kim. "Comparing Chemical Stabilizers for Improving Iowa Granular Road Bearing Capacity." In International Conference on Transportation Geotechnics, pp. 1-8. Singapore: Springer Nature Singapore, 2024. doi: https://doi.org/10.1007/978-981-97-8225-3_1.