Accurate and timely moisture measurement of earthwork during compaction of foundation layers is crucial to proper construction and long-term durability of the pavement structures. Since the traditional methods for measuring moisture are point specific, expensive and/or time consuming. None of the existing methods have been able to deliver real-time, continuous moisture measurements that would aid engineers in delivering more durable pavement structures.
Continue reading Continuous Moisture Measurement During Pavement Foundation ConstructionTag Archives: pavement
Effect of Low and Moderate Recycled Concrete Aggregate Replacement Levels on Concrete Properties
As the demand for aggregate in construction increases, recycling concrete waste as aggregate has been recognized as an environmentally sustainable solution with potential cost savings. It would allow recycling of construction and demolition waste and reduce some of the need to quarry and haul virgin aggregate. However, the use of recycled concrete aggregate (RCA) has been limited by concerns over its quality and performance, and by lack of uniform specifications as to what kind and how much of the aggregate to use in pavement construction. Studies and on-the-ground experience have shown that high levels of RCA reduce the durability of pavements. The effects of lower replacement levels have not been well documented, however.
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Comparing Additives Used in Stabilized Full-Depth Reclamation
Beltrami and Hubbard counties planned pavement rehabilitation on a shared road, presenting a unique opportunity to directly compare two stabilizers: engineered emulsion and Base One, a proprietary mix. While there were some variations in performance and cost, both met design values for pavement strength.
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Putting Research Into Practice: Fog Sealing Chip Sealed Roads Can Improve Performance
Applying a protective surface—or chip seal—to existing asphalt on relatively low-traffic roads is a pavement preservation method used by many transportation agencies. Yet despite its popularity, chip seals can cause various issues. Some agencies have found that applying a fog seal following a chip seal is a cost-effective strategy for improving asphalt performance and public satisfaction.
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Research Pays Off Webinar Series: Intelligent Compaction Technology as a Service and for Compliance
The National Road Research Alliance (NRRA) is hosting “Intelligent Compaction Technology as a Service and for Compliance – How ICT Research has led to the Removal of Technicians from Construction Sites in the UK” on July 19 at 10 a.m. CST, presented by Ruairi Charlesworth of Highway Data Systems.
Continue reading Research Pays Off Webinar Series: Intelligent Compaction Technology as a Service and for ComplianceResearch Pays Off Webinar Series: Intelligent Compaction Technology as a Service and for Compliance
The National Road Research Alliance (NRRA) is hosting “Intelligent Compaction Technology as a Service and for Compliance – How ICT Research has led to the Removal of Technicians from Construction Sites in the UK” on March 15 at 10 a.m. CST, presented by Ruairi Charlesworth of Highway Data Systems.
Continue reading Research Pays Off Webinar Series: Intelligent Compaction Technology as a Service and for ComplianceResearch Pays Off Webinar Series: Performance Benefits of Fiber-Reinforced Thin Concrete Pavement and Overlays
The National Road Research Alliance (NRRA) is hosting “Performance Benefits of Fiber-Reinforced Thin Concrete Pavement and Overlays” on September 21 at 10 a.m. CST, presented by Manik Barman, University of Minnesota Duluth.
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Evaluating Pavement Thickness With 3D Ground-Penetrating Radar
Building on previous MnDOT-sponsored work, researchers have developed a nondestructive method of assessing pavement thickness using 3D ground-penetrating radar (GPR). A vehicle equipped with an array of transmitting and receiving antenna pairs travels at traffic speed collecting full-width GPR data for analysis, minimizing the amount of pavement coring required.
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Evaluating Cracking Resistance Test Methods for Asphalt Pavements
A new method of testing low-temperature cracking in asphalt pavement shows promise for design, quality control and quality assurance. Test results produced by the new method, which is faster and less expensive than the previous method, match well with results from the older method.
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New Project: Have Minnesota’s Warmer Winters Increased the Number of Freeze Thaw Cycles?
Minnesota is experiencing warmer winters and an increase in freeze-thaw events may negatively impact pavement systems. However, the impacts of these recent climate changes on freeze-thaw cycles have not been well studied.
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