Catalog Search Results
Author
Publisher
Colorado Department of Transportation, Research Branch
Pub. Date
2003.
Description
This study evaluates the strength and long-term performance of CFRP prestressed panels in a bridge deck, compares the behavior of bridge decks designed with the empirical and conventional methods of AASHTO, and a new limit-state design, and examines the influence of lap splices between precast panels on deck cracking.
Author
Publisher
Colorado Department of Transportation, Applied Research and Innovation Branch
Pub. Date
2017.
Description
The ongoing deterioration of highway bridges in Colorado dictates that an effective method for allocating limited management resources be developed. In order to predict bridge deterioration in advance, mechanistic models that analyze the physical processes causing deterioration are capable of supplementing purely statistical models and addressing limitations associated with bridge inspection data and statistical methods. A review of existing analytical...
Author
Publisher
Colorado Department of Transportation, Applied Research and Innovation Branch
Pub. Date
2018.
Description
This report presents the development of ultra-high performance concrete (UHPC) using locally available materials that reduce construction costs compared with commercial products. With the aim of achieving a specified compressive strength of 20 ksi, a UHPC mixture is formulated. The implications of various constituent types are examined with an emphasis on silica compounds (silica fume, silica powder, silica sand, finer silica sand, pyrogenic silica,...
Author
Publisher
Colorado Department of Transportation, Research Branch
Pub. Date
2007.
Description
Self-consolidating concrete (SCC) is a stable and highly flowable concrete that consolidates without the help of external vibration and can flow through heavy reinforcement and around corners in complex formwork under its own weight. The exceptional performance of this remarkable material has attracted the attention of construction firms and DOTs in the United States interested in using SCC on new bridge construction and bridge repair projects.
Author
Publisher
Colorado Department of Transportation, Applied Research and Innovation Branch
Pub. Date
2020.
Description
This report presents a case study on the evaluation of bridge decks using various non-destructive test methods. The primary interest lies in quantifying delaminated areas in deck concrete covered with asphalt overlays. Analytical and computational models are formulated to decompose the intensity of GPR scales into two categories: i) initiation and progression of corrosion and ii) delamination of deck concrete, which show good agreement...
Author
Publisher
Colorado Department of Transportation, Applied Research and Innovation Branch
Pub. Date
2014.
Description
The study found that FAST systems have demonstrated the potential to reduce the number of crashes and reduce the cost of winter maintenance activities, if sited at appropriate locations (e.g., high-traffic-volume ice-prone ramps). However, improved installation techniques and involvement of maintenance crews during FAST installation are necessary to further increase the cost-effectiveness of a FAST system deployment. Extra effort will be made in sharing...
Author
Publisher
Colorado Department of Transportation, Applied Research and Innovation Branch
Pub. Date
2018.
Description
In the past several decades, reinforced concrete structures have deteriorated similarly by chemical attack, especially chloride attack. For highway bridges, this phenomenon becomes more severe since bridges are exposed to extreme environmental conditions, such as snow and ice. In an effort to better protect the bridge decks and reduce maintenance costs. The use of WPMs was investigated by the Colorado Department of Transportation (CDOT) to analyze...
Author
Publisher
Colorado Department of Transportation, DTD Applied Research and Innovation Branch
Pub. Date
2010.
Description
Bridge decks deteriorate faster and require more maintenance and repair than any other structural components on highway bridges. Topical protection systems act as barriers to protect bridge decks from corrosion damage by preventing water, oxygen, and chloride ions from reaching the reinforcement. This study evaluated topical protection systems commonly used on highway bridge decks in Colorado, including low-permeability concrete overlays and waterproof...
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