Investigation of PCC Pavement Deterioration: A Few Facts are Worth More than 100 Opinions, Interim Report, HR-2074, 1995

(1995) Investigation of PCC Pavement Deterioration: A Few Facts are Worth More than 100 Opinions, Interim Report, HR-2074, 1995. Transportation, Department of

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Abstract

Portland Cement Concrete (PCC) pavement has served the State of Iowa well for many years. The oldest Iowa pavement was placed in LeMars in 1904. Beginning in 1931, many miles of PCC pavement were built to "get out of the mud.” Many of these early pavements provided good performance without deterioration for more than 50 years. In the late 1950's, Iowa was faced with severe PCC pavement deterioration referred to as D cracking. Research identified the cause of this deterioration as crushed limestone containing a bad pore system. Selective quarrying and ledge control has alleviated this problem. In 1990, cracking deterioration was identified on a three year old pavement on us 20 in central Iowa. The coarse aggregate was a crushed limestone with an excellent history of performance in PCC pavement. Examination of cores showed very few cracks through the coarse aggregate particles. The cracks were predominately confined to the matrix. The deterioration was identified as alkali-silica reactivity (ASR) by a consultant.

Item Type: Departmental Report
Keywords: Coarse aggregates, Crushed limestone, Deterioration by environmental action, Electron microscopes, Fatigue cracking, Portland cement concrete
Subjects: Transportation > Pavements
Transportation
Transportation > Materials
Transportation > Materials > Gravel and aggregates
Transportation > Roads and highways
Transportation > Research
Transportation > Design and Construction
ID Code: 22115
Deposited By: Iowa DOT Library
Deposited On: 13 May 2016 19:25
Last Modified: 13 May 2016 19:25
URI: http://publications.iowa.gov/id/eprint/22115