Forensic Investigation of AC and PCC Pavements with Extended Service Life : Volume 3 : Petrographic Examination of Blast Furnace Slag Aggregate Concrete Cores taken from PCC Pavements in Cuyahoga County , Ohio : Executive Summary Report
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2010-09-01
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Edition:Executive summary report.
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Abstract:Air-cooled blast furnace slag has been used as a coarse ; aggregate in portland cement-based pavement concretes ; since at least the early 1900’s. Many of these concretes ; have performed satisfactorily. In recent times a number ; of PCC slag aggregate pavements constructed in ; Michigan in the early 1990’s have shown extensive ; cracking and joint deterioration after only ten years or so ; of service. The nature of this pavement distress is ; described as being unique to the slag aggregate ; concretes. This situation prompted a number of field ; and laboratory studies, which are cited in the present ; report. Currently there is an on-going FHWA study of ; this distress issue. ; Four slag aggregate concrete pavements in District 12 ; (Cleveland) of the ODOT system currently show ; evidence of the same type of unique distress. Cores ; taken from these pavements were petrographically ; examined in Phase 3 of the present Forensic ; Investigation. The findings are of direct value to ODOT ; and provide additional input and insights for the FHWA ; study.
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Main Document Checksum:urn:sha-512:0b9a2edaf76676fbe35e44798c69eee3d81d442e5c9951dbf11ecf1c56f96febdb362d2ee458e485416298ab52a015b3dd2dca1646b749c54874a432c408501b