Details:

Creators:
Shuler, Scott
Corporate Creators:
Colorado State University
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
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Aggregates Benefit Cost Analysis Chip Seals Condition Surveys Feasibility Analysis Local Materials Low Volume Roads Pavement Maintenance Pavement Performance Preservation
Publication/ Report Number:
CDOT-2013-7
Resource Type:
Tech Report
Geographical Coverage:
Colorado
Corporate Publisher:
Colorado. Dept. of Transportation. Research Branch
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance;
Abstract:
This report documents the performance of two low traffic volume experimental chip seals constructed using

locally available, minimally processed sand and gravel aggregates after four winters of service. The projects

were constructed by CDOT maintenance personnel during the summer of 2009 using two sources of aggregate.

These aggregates consisted of locally available products representing 1) materials routinely utilized and 2)

materials that were marginal with respect to aggregate gradation and crushing requirements. An objective of

this work was to evaluate the feasibility and cost/benefit of using aggregates in chip seals of lower quality than

normally used with respect to gradation on low volume roadways. Because the cost of transporting high quality

aggregates from front range sand and gravel and quarry locations to the eastern regions of Colorado is high and

much of the pavement preservation activities in eastern Colorado are on low volume roadways, utilizing locally

available aggregates would provide economic benefits if acceptable performance were demonstrated.

After four winters and three summers service both experimental chip seals are performing well. Condition

surveys of each pavement were conducted after each winter and summer to document pavement condition.

Results indicate that pavement distress is in the form of longitudinal and transverse cracking and localized

flushing due to non-uniform asphalt emulsion application during construction. Based on results from the last

condition survey, both test pavements should perform acceptably for the next several years assuming no

significant change in traffic levels. No significant differences were measured in performance for any of the

evaluation sections.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:edd463eb48bf1a0c8492a875d7053f91a10fa262dde7d91a7104de808aef4ae0
Download URL:
https://rosap.ntl.bts.gov/view/dot/26265/dot_26265_DS1.pdf
File Type:

Supporting Files

• No Additional Files

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