Material Property Characterization of Ultra-High Performance Concrete Final rept. (Oct 02-Dec 05)

摘要

In the past decade significant advances have been made in the field of high performance concretes (HPC). The next generation of concrete, ultra-high performance concrete (UHPC), exhibits exceptional strength and durability characteristics that make it well suited for use in highway bridge structures. This material can exhibit compressive strength of 193 megapascals (MPa) (28 kilopounds per square inch (ksi)), tensile strength of9.0 MPa (1.3 ksi), significant tensile toughness, elastic modulus of52.4 gigapascals (GPa) (7,600 ksi), and minimal long-term creep or shrinkage. It can also resist freeze-thaw and scaling conditions with virtually no damage and is nearly impermeable to chloride ions. This report presents the results from a large suite of material characterization tests that were completed in order to quantify the behaviors of a commercially available UHPC. The characteristics of this UHPC under four different curing regimes were captured. This study focused on strength-based behaviors (e.g., compressive and tensile strength), long-term stability behaviors (e.g., creep and shrinkage), and durability behaviors (e.g., chloride ion penetration and freeze-thaw).