Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Full-Depth Reclamation: New Test Procedures and Recommended Updates to Specifications
Rehabilitating an old pavement by pulverizing and stabilizing the existing pavement is a process referred to as Full Depth Reclamation (FDR). The stabilized layer becomes either the base or sub-base of the new pavement structure. This process has been used widely for over 20 years in Texas to strengthen and widen structurally inadequate pavement sections. This project developed guidelines on successful FDR practices, developed training materials, and identified areas where improvements to current practices are required. To improve the FDR process, this report includes the following enhancements: Current laboratory testing to select the optimal type and amount of stabilizer takes too long and requires too much material. Continue to run parallel testing with the small sample test protocols proposed in this report. Use the falling weight deflectometer (FWD) during construction to validate that the design assumptions are being met. Implement the proposed bond test to select the optimum prime material and amount needed to effectively bond the base to the surfacing materials. Modify the specifications to avoid working in freezing conditions. Consider implementing the other modifications to specifications proposed in this report.
Full-Depth Reclamation: New Test Procedures and Recommended Updates to Specifications
Rehabilitating an old pavement by pulverizing and stabilizing the existing pavement is a process referred to as Full Depth Reclamation (FDR). The stabilized layer becomes either the base or sub-base of the new pavement structure. This process has been used widely for over 20 years in Texas to strengthen and widen structurally inadequate pavement sections. This project developed guidelines on successful FDR practices, developed training materials, and identified areas where improvements to current practices are required. To improve the FDR process, this report includes the following enhancements: Current laboratory testing to select the optimal type and amount of stabilizer takes too long and requires too much material. Continue to run parallel testing with the small sample test protocols proposed in this report. Use the falling weight deflectometer (FWD) during construction to validate that the design assumptions are being met. Implement the proposed bond test to select the optimum prime material and amount needed to effectively bond the base to the surfacing materials. Modify the specifications to avoid working in freezing conditions. Consider implementing the other modifications to specifications proposed in this report.
Full-Depth Reclamation: New Test Procedures and Recommended Updates to Specifications
T. Scullion (Autor:in) / S. Sebesta (Autor:in) / C. Estakhri (Autor:in) / P. Harris (Autor:in) / C. S. Shon (Autor:in)
2012
104 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Highway Engineering , Ground penetrating radar , Flexible pavements , Pavement recycling , Gradation , Reclamation , Texas , Base courses , Gyratory compactor , Pavement bases , Subgrades , Soil stabilization , Phenolphthalein , Field tests , Full depth reclamation
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