Title: Impact of Materials, Proportioning, and Curing on Ultra- High-Performance Concrete Properties

Author(s): A. S. Carey, I. L. Howard, D. A. Scott, R. D. Moser, J. Shannon, and A. Knizley

Publication: Materials Journal

Volume: 117

Issue: 1

Appears on pages(s): 213-222

Keywords: compressive strength; optimization; ultra-high-performance concrete; varying proportions

DOI: 10.14359/51719076

Date: 1/1/2020

Abstract:
This paper evaluated constituent proportions on mechanical and thermal properties of ultra-high-performance concrete. This paper assessed how fine aggregates and fibers at varying proportions enhance cement paste and can improve its mechanical properties to a desired compressive strength, elastic modulus, or tensile strength. Approximately 400 specimens were tested for mechanical properties within four curing regimes and 22 different mixtures. These experiments aimed to add to the body of knowledge found during literature review. Past efforts found in literature have drawn conclusions by varying one ingredient at a time, whereas the current effort systematically varied multiple ingredients. Results showed compressive strength to be due to synergistic relationships between cement paste, fine aggregates, and steel fibers where absence of any ingredient reduced strength. Tensile strength and elastic modulus were dominated by a single ingredient.