Details:

Creators:
Ahlborn, Theresa M. ; Peuse, Erron J. ; Misson, Donald Li
Ahlborn, Theresa M. ; Peuse, Erron J. ; Misson, Donald Li Less -
Corporate Creators:
Michigan Technological University. Department of Civil and Environmental Engineering
Corporate Contributors:
Michigan. Dept. of Transportation. Construction and Technology Division
Subject/TRT Terms:
[+]
Bridge Construction Bridge Design Concrete Bridges Concrete Bridges--Design And Construction High Strength Concrete High Strength Concrete--Testing Structural Analysis Structural Analysis (Engineering) Testing
Publication/ Report Number:
RC-1525
Resource Type:
Tech Report
Geographical Coverage:
Michigan
Edition:
Final report.
Corporate Publisher:
Michigan. Department of Transportation
Abstract:
One of the latest advancements in concrete technology is Ultra-High Performance Concrete (UHPC). UHPC is

defined as concretes attaining compressive strengths exceeding 25 ksi (175 MPa). It is a fiber-reinforced, denselypacked

concrete material which exhibits increased mechanical performance and superior durability to normal and

high strength concretes. UHPC has great potential to be used in the bridge market in the United States. However, to

gain acceptance by designers, contractors, and owners this material needs to be tested according to American

Society for Testing and Materials (ASTM) International and American Association of State Highway Transportation

Officials (AASHTO) standards, and new practices must be developed.

The focus of this research was to investigate how the age at which UHPC undergoes a steam (thermal) treatment

affects some mechanical and durability properties. Four mechanical properties (compressive strength, modulus of

elasticity, Poisson’s ratio, and flexural characteristics) and properties related to durability (chloride ion penetration

resistance, freeze-thaw durability, and coefficient of thermal expansion) were investigated. The testing was

conducted with differing curing conditions and at different ages to examine how these factors influence each of the

measured properties. Specimens, independent of age at thermal treatment, yielded compressive strengths of over 30

ksi, modulus of elasticity values in excess of 8000 ksi, and a Poisson’s ratio of 0.21. Flexural characteristics were

dependent on curing regime. Testing consistently validated that UHPC had negligible chloride ion penetration, a

high resistance to freeze-thaw cycling (durability factor of 100), and coefficient of thermal expansion values similar

to that of normal strength concretes for both ambient cured and thermally treated specimens. Additional results

revealed UHPC’s autogenous healing properties while undergoing freeze-thaw cycling, low variability between

batches, and the reproducibility of results between different U.S. laboratories.

Lastly, recommendations were developed for future testing of UHPC durability properties and a preliminary lifecycle

cost comparison showed that the low life-maintenance costs of UHPC can offset higher initial costs, especially

as the use of UHPC in the U.S. increases and the initial cost of the material decreases.


Format:
PDF
Funding:
2003-0063
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:32e26606d97a33cd02a4b91bc26c4681946721eb7bce3d22fda6c148e4264883
Download URL:
https://rosap.ntl.bts.gov/view/dot/18193/dot_18193_DS1.pdf
File Type:

Supporting Files

• No Additional Files

More +