{"id":900623,"date":"2026-11-06T18:57:40","date_gmt":"2026-11-06T18:57:40","guid":{"rendered":"https:\/\/www.metaflotech.com\/?p=900623"},"modified":"2026-11-10T19:36:12","modified_gmt":"2026-11-10T19:36:12","slug":"sandy-soil-stabilization-for-forestry-roads-performance-under-traffic-loads-of-up-to-250-tonnes","status":"publish","type":"post","link":"https:\/\/www.metaflotech.com\/es\/sandy-soil-stabilization-for-forestry-roads-performance-under-traffic-loads-of-up-to-250-tonnes\/","title":{"rendered":"Sandy Soil Stabilization for Forestry Roads: Performance Under Traffic Loads of Up to 250 Tonnes"},"content":{"rendered":"<h2><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-900626\" title=\"Road construction in a forested area, where soil stabilization helps improve load-bearing capacity and long-term road durability.\" src=\"https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/5-Operational-Bottlenecks-That-Increase-Industrial-Wastewater-Treatment-Costs-1.webp\" alt=\"Unpaved road in a forested area undergoing construction, with heavy machinery carrying out road preparation and soil stabilization activities.\" width=\"768\" height=\"428\" srcset=\"https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/5-Operational-Bottlenecks-That-Increase-Industrial-Wastewater-Treatment-Costs-1.webp 768w, https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/5-Operational-Bottlenecks-That-Increase-Industrial-Wastewater-Treatment-Costs-1-300x167.webp 300w, https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/5-Operational-Bottlenecks-That-Increase-Industrial-Wastewater-Treatment-Costs-1-18x10.webp 18w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Forestry roads are among the most demanding components of the wood and pulp industry&#8217;s transportation infrastructure. Subjected to daily heavy vehicle traffic, these roads must maintain reliable operating conditions, even in areas with low-bearing-capacity soils and seasonal weather patterns alternating between dry periods and heavy rainfall.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When road structures cannot withstand these conditions, problems such as bogging, corrugation, erosion, and rutting can develop. Beyond affecting road accessibility, these issues require frequent maintenance and increase the complexity of logistics operations.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this context, soil stabilization plays an important role in improving the structural performance and durability of unpaved roads.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">To evaluate an alternative technology for these conditions, MetaFLO Technologies partnered with a pulp producer to study the application of its SoilTech biopolymer on a forestry road.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The project combined laboratory testing conducted by the Transportation Laboratory at the Federal University of Mato Grosso do Sul (LATRAN\/UFMS) with 12 months of monitoring on a field trial section.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The results demonstrated substantial improvements in bearing capacity and the preservation of the stabilized layer&#8217;s structural integrity under actual operating conditions.<\/span><\/p>\n<h3><b>The Challenge: Supporting 250-Tonne Truck Configurations on Sandy Soil<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Forestry operations require road infrastructure capable of supporting exceptionally heavy transport configurations. On the evaluated section, 21-axle trucks operated with a Gross Combination Weight (GCW) of up to 250 tonnes, carrying approximately 192 tonnes of eucalyptus timber payload. Axle loads exceeded 13 tonnes.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The challenge was further compounded by the characteristics of the local soil. Classified by Brazil&#8217;s National Department of Transport Infrastructure (DNIT) as tropical fine sand, the material was also non-plastic (PI = NP), indicating low natural cohesion.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In laboratory testing conducted by LATRAN\/UFMS using modified compaction effort, the natural soil recorded a California Bearing Ratio (CBR) of 38.8%. This value served as the baseline for evaluating the performance of the different stabilization mixtures.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Under repeated heavy vehicle traffic, these soil characteristics contributed to deformation and increased road maintenance requirements.<\/span><\/p>\n<h3><b>SoilTech: A Seaweed-Based Biopolymer for Soil Stabilization<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">To address this challenge, <a href=\"https:\/\/www.metaflotech.com\/es\/productos\/biopolimeros\/soiltech\/\" target=\"_blank\" rel=\"noopener\">SoilTech<\/a> was selected as a seaweed-based biopolymer developed to improve the properties of soils used in infrastructure construction.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The technology promotes soil particle binding, increasing cohesion between particles and improving the mechanical behaviour of the stabilized material.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">SoilTech is applied at low dosages, with field application rates ranging from 0.01% to 0.03% by dry soil mass.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Another important advantage is its compatibility with conventional road construction equipment. The product can be incorporated using water trucks, soil recyclers or agricultural disc harrows, motor graders, and compactors.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This allows SoilTech to be integrated into conventional road construction processes without requiring specialized equipment.<\/span><\/p>\n<h3><b>Laboratory Validation: SoilTech and Cement Combination Achieves a CBR of 207.1%<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The mechanical performance of the mixtures was evaluated by the Transportation Laboratory at the Federal University of Mato Grosso do Sul (LATRAN\/UFMS).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Testing was conducted using modified compaction effort, comparing natural soil with different chemical and granular stabilization alternatives.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Among the evaluated mixtures, the combination of 2% CP II cement and 0.2% SoilTech achieved the highest California Bearing Ratio (CBR): <\/span><b>207.1%<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-900628\" title=\"SoilTech Soil Stabilization \u2013 Laboratory CBR Results\" src=\"https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/Resultados-laboratoriais_-estabilizacao-do-solo-1.png\" alt=\"Laboratory test results comparing the California Bearing Ratio (CBR) and swelling of natural soil and stabilized soil mixtures, highlighting SoilTech's 207.1% CBR with 2% cement.\" width=\"666\" height=\"444\" srcset=\"https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/Resultados-laboratoriais_-estabilizacao-do-solo-1.png 1536w, https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/Resultados-laboratoriais_-estabilizacao-do-solo-1-300x200.png 300w, https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/Resultados-laboratoriais_-estabilizacao-do-solo-1-1024x683.png 1024w, https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/Resultados-laboratoriais_-estabilizacao-do-solo-1-768x512.png 768w, https:\/\/www.metaflotech.com\/wp-content\/uploads\/2026\/11\/Resultados-laboratoriais_-estabilizacao-do-solo-1-18x12.png 18w\" sizes=\"auto, (max-width: 666px) 100vw, 666px\" \/><\/p>\n<p style=\"text-align: center;\"><i><span style=\"font-weight: 400;\">Source: LATRAN\/UFMS laboratory testing using modified compaction effort.<\/span><\/i><\/p>\n<p><span style=\"font-weight: 400;\">In addition to achieving the highest CBR, the cement and SoilTech mixture recorded an optimum moisture content of 5.8%, compared with 9.2% for the cement-only mixture.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">These findings demonstrate the potential of this combination to improve soil bearing capacity and modify its compaction characteristics.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It is important to note that laboratory results reflect specific testing conditions and should not be confused with the performance subsequently observed in the field trial section.<\/span><\/p>\n<h3><b>From Laboratory to Field: 12 Months of Performance Under Heavy Traffic<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Based on the technical evaluations, a field trial section was constructed using the following composition:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">70% natural soil (sandy, A-2-4 classification);<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">30% graded crushed stone (BGS);<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">0.02% SoilTech;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">2% CP II cement.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The section was monitored for 12 months to assess its performance under continuous 21-axle truck traffic and varying regional weather conditions.<\/span><\/p>\n<p><b>Monitoring observations over time:<\/b><\/p>\n<p><b>1 month:<\/b><span style=\"font-weight: 400;\"> Road surface conditions remained satisfactory, with no plastic deformation or rutting.<\/span><\/p>\n<p><b>5 months:<\/b><span style=\"font-weight: 400;\"> The stabilized layer maintained its structural integrity, even under wet conditions and axle loads exceeding 13 tonnes.<\/span><\/p>\n<p><b>9 months:<\/b><span style=\"font-weight: 400;\"> During the heavy rainfall season, with continuous timber transport from two forestry properties, the stabilized section maintained surface cohesion, unlike surrounding untreated roads.<\/span><\/p>\n<p><b>12 months:<\/b><span style=\"font-weight: 400;\"> After one year of operation, the first localized corrective maintenance was performed, consisting of minor pothole repairs.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The monitoring period demonstrated the stabilized layer&#8217;s ability to maintain its performance under varying operating conditions, including periods of increased moisture and intensive heavy vehicle traffic.<\/span><\/p>\n<h3><b>An Alternative for Forestry Infrastructure Challenges<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The study demonstrates how biopolymer-based soil stabilization can contribute to improving the performance of unpaved roads exposed to demanding operating conditions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The combination of laboratory results and field monitoring demonstrated substantial improvements in bearing capacity, preservation of structural integrity over 12 months, and positive indicators of construction efficiency.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In forestry operations, where continuous heavy vehicle traffic demands durable and reliable infrastructure, selecting the appropriate stabilization technology requires consideration of soil characteristics, traffic loads, and regional climatic conditions. This assessment makes it possible to develop tailored solutions suited to the material properties and specific requirements of each project.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">With SoilTech, MetaFLO develops solutions designed to improve soil performance and support operational efficiency in infrastructure projects.<\/span><\/p>\n<p><b>Is your operation facing challenges with unpaved roads and heavy vehicle traffic?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Contact MetaFLO&#8217;s technical team to explore how SoilTech can be applied to your project.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Forestry roads are among the most demanding components of the wood and pulp industry&#8217;s transportation infrastructure. Subjected to daily heavy vehicle traffic, these roads must maintain reliable operating conditions, even in areas with low-bearing-capacity soils and seasonal weather patterns alternating between dry periods and heavy rainfall. When road structures cannot withstand these conditions, problems such&hellip;<\/p>","protected":false},"author":20,"featured_media":900626,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_joinchat":[],"footnotes":""},"categories":[23],"tags":[167,145],"class_list":["post-900623","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","tag-soil-stabilization","tag-soiltech"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Soil Stabilization for Forestry Roads | SoilTech<\/title>\n<meta name=\"description\" content=\"Discover how SoilTech improved sandy soil bearing capacity, achieving a 207.1% CBR in laboratory testing for heavy-duty forestry road applications.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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