United States Department of Transportation
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners.
As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
i
Evaluation of microcracking and chemical deterioration in concrete pavements.
-
1995-10-31
[PDF-9.07 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final report.
-
Corporate Publisher:
-
Abstract:The major objective of this research project was to investigate the
chemistry and morphology of portland cement concrete pavements in
Iowa. The integrity of the various pavements was evaluated qualitatively,
based on the presence or absence of microcracks, the presence or
absence of sulfate minerals, and the presence or absence of alkali-silica
gel(s).
Major equipment delays and subsequent equipment replacements
resulted in significant delays over the course of this research project.
However, all these details were resolved and the equipment is currently in
place and fully operational. The equipment that was purchased for this
project included: (I) a LECO VP 50, 12-inch diameter, variable speed
grinder/polisher: (2) a Hitachi S-2460N variable pressure scanning electron
microscope; and (3) a OXFORD Instruments Link ISIS microanalysis system
with a GEM (high-purity germanium) X-ray detector.
This study has indicated that many of the concrete pavements
contained evidence of multiple deterioration mechanisms: and hence,
the identification of a single reason for the distress that was observed in
any given pavement typically had to be based on opinion rather than
empirical evidence.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
