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Hammer, Kevin Phillip (2005) ANALYSIS OF GRANULAR MATERIALS IN PENNSYLVANIA HIGHWAYS. Master's Thesis, University of Pittsburgh. (Unpublished)

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ABSTRACTANALYSIS OF CRUSHING OF GRANULAR BASES IN PENNSYLVANIA HIGHWAYSKevin P. Hammer, MSUniversity of Pittsburgh, 2005The purpose of this study is to investigate the phenomena of crushing of granular materials forming part of actual flexible pavement systems. Crushing can occur in granular bases during three separate phases, installation and placement, compaction and through everyday vehicular traffic. Crushing in the granular base material could result in a breakdown in strength of the pavement section which could results in pavement cracking or pavement failure. Crushing of the pavement base can occur as a result of a combination of compressive and shear stresses that result from traffic loading and/or construction equipment. Very few field studies exist on the crushing of granular materials under asphalt pavements. This investigation will analyze the crushing of granular bases forming part of actual flexible pavements.For this research, granular materials from actual roadways were analyzed using sieve analysis, point load testing and fractal analysis. In addition to the roadway base samples obtained from actual flexible pavements, "baseline" samples were obtained from stockpiles of roadway base typically used by the Pennsylvania Department of Transportation (PENNDOT).A comparison of the actual a road base samples with those "baseline" samples indicated that some crushing took place in the granular bases. This crushing, however, was not severe. This conclusion is based on the results from the sieve and fractal analyses used in the research program.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Hammer, Kevin
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee MemberGarcia, Calixto Igarcia@engr.pitt.eduCIGARCIA
Committee MemberLin, Jeen-Shangjslin@engr.pitt.eduJSLIN
Committee MemberVallejo, Luisvallejo@civ.pitt.eduVALLEJO
Date: 13 October 2005
Date Type: Completion
Defense Date: 7 July 2005
Approval Date: 13 October 2005
Submission Date: 21 July 2005
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Civil and Environmental Engineering
Degree: MSCE - Master of Science in Civil Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: crushing; fractal; granular base
Other ID:, etd-07212005-124604
Date Deposited: 10 Nov 2011 19:52
Last Modified: 15 Nov 2016 13:46


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