Browsing by Subject "Joint faulting"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Adaptation of the 2002 Guide for the Design of Minnesota Low-Volume Portland Cement Concrete Pavements(Minnesota Department of Transportation, Research Services Section, 2007-06) Yut, Iliya; Husein, Shariq; Turgeon, Carly; Khazanovich, LevA new Mechanistic-Empirical Pavement Design Guide (MEPDG), also known as the 2002 Design Guide, was recently proposed in the United States. The development of such a procedure was conducted by the National Cooperative Highway Research Program (NCHRP) under sponsorship by the AASHTO. The Design Guide is a significant innovation in the way pavement design is performed. A comprehensive evaluation of the MEPDG performance predictions was conducted. It was found that the faulting model produced acceptable predictions, while the cracking model had to be adjusted. The cracking model was re-calibrated using the design and performance data for 65 pavement sections located in Minnesota, Iowa, Wisconsin, and Illinois. A prototype of the catalog of recommended design features for Minnesota low volume PCC pavements was developed using the MEPDG version 0.910. The catalog offers a variety of feasible design alternatives (PCC and base thickness, joint spacing and PCC slab width, edge support type, and dowel diameter) for a given combination of site conditions (traffic, location, and subgrade type). It is recognized, however, that version 0.910 is not the final version of the MEPDG. Therefore, the catalog should be updated after the MEPDG software is finalized.Item Synthetic Macro-Fibers for Mitigating Distresses in Thin Concrete Pavements(2021-07) Roy, SouvikApplication of Fiber Reinforced Concrete (FRC) in constructing concrete pavement overlaysand new concrete pavements is gaining more attention. However, there has been limited research on quantifying the performance benefits of fiber and its dosage in concrete pavements, specifically in thin concrete pavements. The present study focused on determining the influence of synthetic macro-fibers in keeping the joint performance high for a longer duration of pavement service life and in mitigating thin concrete pavement distresses such as transverse joint faulting and fatigue cracking. Field data was collected from fiber reinforced in-service test sections at the MnROAD test facility, located on I-94 westbound, 35 miles north-west of the twin cities metropolitan area, Minnesota. Field data included, falling weight deflectometer (FWD), environmental strain, transverse joint faulting, international roughness index (IRI), and crack survey data. It was found that joint performance was significantly affected by the inclusion of fibers. High fiber dosage resulted in greater LTE, lower differential displacement, and lower loaded-side displacement. A faulting prediction equation was proposed on the basis of faulting data and statistical relationships. A relationship was also established between the joint faulting and IRI. The distress data analysis indicated that fatigue cracking may not be the dominant distress of the thin fiber reinforced pavements, but the transverse joint faulting is.