Catalog Search Results
Author
Pub. Date
2014.
Description
The purpose of this report is to document Accelerated Bridge Construction (ABC) techniques on IBRD (Innovative Bridge Research and Development) project 102470 for the construction of Bridge N-16-Q on State Highway 69 over Turkey Creek. The project demonstrated faster pier erection by utilizing precast pier caps to eliminate concrete cure time from the critical path in the construction schedule.
Author
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
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
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
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
Pub. Date
2018.
Description
This study analyzes the effects of temperature change and thermal gradients on deck joint movement and provide recommendations regarding deck joint elimination. The data indicates that temperature shifts and thermal gradients through the depth of the girders along the joint are impacting the bridge's movements and causing changes in stress. A strong parallel is shown between the temperature changes and the study joint's movement and changes in stresses...
Author
Pub. Date
[2018]
Description
This project focused on the chloride-induced corrosion of reinforcing steel in structural concrete. The primary goal of this project is to analyze the surface chloride concentration level of the concrete bridge decks throughout Colorado. The study indicates three factors that can affect chloride concentration levels in bridge decks: age of the concrete, traffic, and weather. Samples were collected from decks and curbs of bridges in different climate...
Author
Pub. Date
2010.
Description
The purpose of this study was to determine the procedures and possible benefits associated with flowing concrete. Based on the study presented in this report, it was determined that SCC was used successfully in the I-25 bridge replacement project in Trinidad. Unfortunately, the all-around lack of construction experience with SCC resulted in numerous aesthetic problems that are atypical of the material.
.png)