Author: Jason H. IdekerPublisher:
ISBN:
Category :
Languages : en
Pages : 27
Book Description
Research Project Work Plan for Internal Curing of Concrete Bridge Decks
Author: Jason H. IdekerApplication of Internal Curing to Improve Concrete Bridge Deck Performance
Author: Arman AbdigaliyevPublisher:
ISBN:
Category : Concrete
Languages : en
Pages : 89
Book Description
Research Project Work Plan for Concrete Bridge Deck Performance Data and Metrics for the State of Oregon
Author: Thomas SchumacherInternal Curing of Concrete Bridge Decks in Utah
Author: Joseph Michael YaedePublisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 97
Book Description
In the field, Schmidt rebound hammer testing showed that the internally cured concrete was neither consistently stronger nor weaker than the conventional concrete. On average, the internally cured concrete exhibited higher chloride concentrations than the conventional concrete. On average, the conventional concrete bridge decks had 4.6, 21.5, and 2.8 times more cracking than the internally cured concrete decks at 5 months, 8 months, and 1 year, respectively. At 1 year, very distinctive reflection cracks from the joints between the underlying pre-cast half-deck panels were observed on all of the decks.
Evaluation of Internally Cured Bridge Deck Concrete with Standard and Optimized Aggregate Gradation
Author: Arman AbdigaliyevPublisher:
ISBN:
Category : Bridges
Languages : en
Pages : 117
Book Description
Due to the relatively high cement content and low water-to-cement ratio (w/c) used, bridge deck concrete is prone to premature cracking. Internal curing has been found to greatly reduce the chance of premature cracking as well as concrete deterioration. This research developed internally cured bridge deck concrete based on a local mix design in Nebraska. Four different lightweight fine aggregate (LWFA) as internal curing agents were evaluated and their effects on fresh, mechanical, durability, and shrinkage properties of concrete were studied. The study focused on resolving two issues associated with fine aggregate replacement based on Bentz equation. To identify the most effective LWFA dosage for shrinkage reduction, different replacement rates of fine aggregates (50%, 100%, 125%, 150% and 175%) were adopted to account for the moisture loss during construction and drying period. Aggregate blends of internally cured mixes were also optimized to account for the disturbed aggregate gradations due to the introduced LWFA. Overall performance of internally cured concrete mixes with both non-optimized and optimized gradations were evaluated. The research demonstrated that effective internal curing concrete can be achieved with the optimized aggregate gradation.
Using Internal Curing to Prevent Concrete Bridge Deck Cracking
Author: Eric Charles MackPublisher:
ISBN:
Category : Concrete
Languages : en
Pages : 210
Book Description
Curing Concrete
Author: Peter C. TaylorPublisher: CRC Press
ISBN: 0203866134
Category : Technology & Engineering
Languages : en
Pages : 215
Book Description
Curing is one of those activities that every civil engineer and construction worker has heard of, but in reality does not worry about much. In practice, curing is often low on the list of priorities on the construction site, particularly when budgets and timelines are under pressure. Yet the increasing demands being placed on concrete mixtures also
Research Project Work Plan for Strategies to Increase the Service Life of Existing Bridge Decks
Author: O. Burkan IsgorCuring Practices to Reduce Plastic Shrinkage in Concrete Bridge Decks
Author: Steven W. PeytonPublisher:
ISBN:
Category : Bridges
Languages : en
Pages :
Book Description
"The large, exposed area of concrete bridge decks makes proper curing critical and difficult. Plastic shrinkage cracks are common in improperly cured bridge decks. The objective of this research was to identify curing regimens that successfully reduce plastic shrinkage cracking. This was accomplished by surveying Arkansas Highway and Transportation Department engineers to determine the current construction practices on Arkansas bridge decks, documenting the curing of five bridge decks under construction, and studying the effectiveness of curing regimens in the laboratory. The survey responses show inconsistencies in the interpretations of the construction specifications that were also evident in the field study. Delayed curing, high evaporation rate, and increased girder deflection increased the likelihood of cracking in the decks. Inconsistent application of curing materials caused increased cracking in the laboratory study. Removing impediments, such as tined finishes, to timely curing and clarifying curing specifications would reduce cracking in bridge decks."--Project summary.
Simulating the Curing of Concrete on Bridge Decks
Author: G. WojcikPublisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 8
Book Description