Investigation of Concrete from I-20 Near Monroe, Louisiana

摘要

This report covers an investigation conducted in l994-1995 to determine theprobable cause of concrete pavement deterioration in certain lanes of I-20 east and west of Monroe, LA. The investigation was conducted by the U.S. Army Corps of Engineers Waterways Experiment Station at the request of the Louisiana Department of Transportation. Cores taken from distressed and non-distressed areas from different sections of the roadway were evaluated to determine the following: (a) the role of alkali-carbonate-rock reaction: (b)the role of alkali-silica reaction; (c) the contribution of freezing-and-thawing action to the deterioration; and (d) the contribution of fresh concrete properties and construction practices to the deterioration. The report includes the results of these analyses as well as conclusions and recommendations.