Self-compacting, high strength steel fibre reinforced mortar for pre-cast sheet piles

Title: Self-compacting, high strength steel fibre reinforced mortar for pre-cast sheet piles
Author(s): E.S. Lappa, C. van der Veen, J.C. Walraven
Paper category : conference
Book title: International RILEM Symposium on Self-Compacting Concrete
Editor(s): O. Wallevik and I. Nielsson
Print-ISBN: 2-912143-42-X
e-ISBN: 2912143713
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 732 - 740
Total Pages: 9
Nb references: 6
Language: English

Abstract: Self-compacting, fibre reinforced high strength mortars have been developed at Delft University of Technology for the construction of sheet piles. Previously, a mix composition was developed which provided the demanded one-day compressive strength of at least 60 MPa, a slump flow of more than 600 mm and a funnel time of approximately 10 seconds. The mixture was supplied with 125 kg/m3 straight 13 mm long steel fibres with an aspect ratio of 81, and showed a compressive strength of 120 MPa at the age of 28 days. In this study it was investigated if aggregate, available at the local Dutch market as sand in large quantities with a maximum diameter of 2 mm, could be used instead of the previously developed laboratory aggregates composed out of separate fractions. The mixtures were tested on their workability and self-compacting ability in the fresh state. The compressive strength, splitting tensile strength, Young's Modulus, flexural strength and fracture energy were determined in the hardened state. The modified mixtures performed equally well compared to the reference one, showing that as long as the maximum diameter is reduced to 2 mm and the total volume of sand plus steel fibres does not exceed 43% by volume, a mixture fulfilling structural needs can be produced even with different aggregate size distributions.

Online publication: 2003-08-21
Publication type : abstract_only
Public price (Euros): 0.00