MIX DESIGN AND BASIC PROPERTIES OF A NEW UHPFRC FEATURING PORTLAND-LIMESTONE CEMENT

Author(s): B. Shao and P. Gauvreau
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 37-44
Total Pages: 8
Language: English

Abstract: This paper describes the development and validation of a new mix design for ultra highperformance fibre reinforced concrete that uses Portland-limestone cement as the primary cementing material. In Canada, Portland-limestone cement consists of Portland cement and between 6% and 15% of powdered limestone. This product was introduced to the Canadian market in 2011 as a means of reducing environmental problems associated with cement and is expected to become the primary type of cement for general use in Canada by 2020. In addition to Portland-limestone cement, the mix design described in this paper includes ground granulated blast-furnace slag and silica fume as supplementary cementing agents. Steel fibres account for 2 percent of the mix by volume. Tests of the properties of fresh and hardened concrete produced from this mix design demonstrated that Portland-limestone cement can be a suitable basis for the production of ultra high-performance fibre reinforced concrete. Typical mechanical properties at 56 days include cube compressive strength of at least 130 MPa and tensile strength (modulus of rupture) of 15 MPa. Free shrinkage strains are similar to comparable mixes and rapid chloride permeability is practically negligible.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00