Influence of Casting Conditions on Durability and Structural Performance of HPC-AR

The main objective of this project is to extend the understanding of dynamic segregation of self-consolidating concrete (SCC). Dynamic segregation is the separation of coarse aggregates from the mortar during flow, which can negatively affect the performance of concrete. By means of a modified version of the tilting box test, the dynamic segregation of SCC can be monitored over different cycles at different cycle times. A workability box for good stability has been proposed in literature. The proposed project aims to extend this workability box principle for different flow distances (number of cycles) and different concrete compositions. From previous studies, the paste volume (or mortar volume) in concrete appeared a critical factor. The laboratory research will be continued in an industrial setting. The testing parameters in the tilting box (number of cycles and duration of cycles) will be coupled to the flow distance and flow velocity in real formworks. Furthermore, the dynamic segregation index will be related to a reduction in concrete performance, in terms of mechanical properties and durability of the concrete, and bond strength with the rebars or prestress strands. Based on the outcome of the research, performance specifications, in terms of fresh concrete properties, will be developed and the robustness to small variations in constituent elements of a typical, well-performing SCC mixture will be investigated.

• Record URL:
  http://recast.mst.edu/projects/influenceofcastingconditionsonperformance/

Language

• English

Project

• Status: Completed
• Funding: $120614.00
• Contract Numbers:

  DTRT13-G-UTC45

• Sponsor Organizations:

  Research and Innovative Technology Administration

  University Transportation Centers Program
  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Research on Concrete Applications for Sustainable Transportation (RE-CAST)

  Missouri University of Science and Technology
  Rolla, MO  United States  65409-0710
• Project Managers:

  Feys, Dimitri

• Performing Organizations:

  Research on Concrete Applications for Sustainable Transportation (RE-CAST)

  Missouri University of Science and Technology
  Rolla, MO  United States  65409-0710
• Principal Investigators:

  Feys, Dimitri

• Start Date: 20150101
• Expected Completion Date: 20180630
• Actual Completion Date: 0
• Source Data: RiP Project 39134

Subject/Index Terms

• TRT Terms: Coarse aggregates; Durability; High performance concrete; Mechanical properties; Mortar; Reinforcing bars; Self compacting concrete; Workability
• Subject Areas: Construction; Highways; Pavements; I30: Materials;

Filing Info

• Accession Number: 01554032
• Record Type: Research project
• Source Agency: Research on Concrete Applications for Sustainable Transportation (RE-CAST)
• Contract Numbers: DTRT13-G-UTC45
• Files: UTC, RIP
• Created Date: Feb 25 2015 1:00AM