United States Department of Transportation
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Development of a Materials and Engineering Database for Shales of Eastern Kansas
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2007-01-01
[PDF-1023.62 KB]
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TRIS Online Accession Number:01049504
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Edition:Final Report June 2003– July 2006
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Abstract:Construction site assessments as well as materials analyses are currently filed away when projects are completed. The accumulated data is not easy to access or manipulate. The past experience of contractors is also not systematically recorded and available. When similar materials or geologic units are encountered in future projects, the cycle of testing is repeated. This does not make efficient or effective use of previously gathered information. The primary filed data included in this database are shale lithology, structure, and color. Laboratory data include second cycle slake durability (Id2), jar index, water absorption, and calcium carbonate content. For some localities, contractors provided information on excavation and shale manipulation methods required to meet engineering specifications. The database is expandable and new localities, shale units, and types of data can be added easily. The database can also be converted into a web-based format that can be readily accessed by Kansas Department of Transportation (KDOT) employees, contractors, and other interested parties. It is anticipated that the development of a central database for shale materials will save KDOT many hours of field, laboratory, and administrative time. Such a database will minimize the duplication of testing. The identification of well-defined relationships between outcrop observations, test results, and engineering performance will enable the behavior of rock units to be better predicted. This should improve the success of both project planning and contractor bidding. The identification of potentially problematic units early will also save both time and money expended in redesign, remediation, and repair. This database will give KDOT inspectors and estimators a wealth of information for bids and construction of KDOT projects.
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