Mechanical Properties of Ultra High Performance Concrete with calcium carbonate as a substitute of cementitious material

Hermes Ariel Vacca Gamez, Yezid Alexander Alvarado Vargas, Javier Fuentes, Vivian Ulloa, María León, Andrés Núñez

Research output: Contribution to conferencePaperpeer-review

Abstract

The influence of calcium carbonate -as a filling material- on the mechanical properties of an Ultra High Performance Concrete (UHPC) featuring silica fume and cement as cementitious materials, was evaluated. Properties like compressive, flexural, and tensile strength, as well as the elastic modulus were evaluated for three different calcium carbonate substitution rates (47%, 35,5% and 24%), and were all compared to a reference mixture of UHPC with no substitution. A better packaging of dry materials, leading to improvement in compactness and resistance, was observed when a higher quantity of calcium carbonate was used. Results of 56-day-compressive strength were higher for samples with calcium carbonate compared to those of the reference mixture, but presented a different trend for other properties. Temperature measurement led to develop a viable methodology to substitute the cementitious material for carbonate calcium or any other filling material.
Original languageEnglish
DOIs
StatePublished - 2019
EventInternational interactive symposium on Ultra-High performance concrete - , United States
Duration: 08 Jun 2019 → …

Conference

ConferenceInternational interactive symposium on Ultra-High performance concrete
Country/TerritoryUnited States
Period08/06/19 → …

Keywords

  • UHPC
  • calcium carbonate
  • cement
  • silica fume and concrete
  • tensile strength

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