|Project Name:||Compression Response of a Rapid-Strengthening Ultra-High Performance Concrete Formulation|
Office of Infrastructure Research and Development |
|Team:||Bridge and Foundation Engineering Team|
Infrastructure Research and Technology Strategic Plan and Roadmap|
|Project Description:||Compressive mechanical properties are critical indicators of the degree of hydration of concrete and are frequently used as indicators of other mechanical and durability properties. The rate of compressive mechanical response development is of importance to construction projects wherein the concrete hydration is on the critical path. Ultra-high performance concrete (UHPC), when used in field-cast connections between prefabricated bridge elements, can create robust connections that emulate monolithic components. Traditional UHPC formulations tend to express a delay prior to setting and initial mechanical property development. This research program investigated the compressive mechanical response of a new UHPC formulation intended for use in field-cast infrastructure connections. The time to initiation and rate of property development was observed to be influenced by the ambient environment surrounding the concrete during curing. At an elevated curing temperature, the UHPC was observed to reach 10,000 pounds per square inch compressive strength at 11 hours. The compressive strength, modulus of elasticity, axial strain at peak strength, and overall stress-strain response were captured under three curing conditions from early age through 56 days after casting.|
|Start Date:||August 1, 2011|
|End Date:||September 30, 2012|
The objective of this research study was to evaluate the compressive mechanical response of a rapid strengthening ultra-high performance concrete (UHPC) formulation when exposed to a range of curing conditions. This research result is critical to the broader use of UHPC-class materials as field-cast grouts in connections between Prefabricated Bridge Elements and Systems (PBES) components.
|Test Methodology:||Complete standardized and modified material tests to assess basic compressive mechanical properties. Analyze results in context of prior research on similar materials.|
|Expected Benefits:||This project will facilitate the broader use of ultra-high performance concrete-class materials, thus allowing for the construction of a more robust, durable highway infrastructure.|
|Deliverables:||1. Name: Compression Response of a Rapid-Strengthening Ultra-High Performance Concrete Formulation.|
Product Type(s): Research report, Technical report
Description: Full report providing the results of the research.
2. Name: Compression Response of a Rapid-Strengthening Ultra-High Performance Concrete Formulation
Product Type(s): Techbrief
Description: TechBrief. Executive Summary of the findings of the research.
Bridges and other structures|