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Durability, permeability, and mechanical performance of sprayed UHPC, as an attribute of fibre content and geometric stability

journal contribution
posted on 2023-09-28, 10:37 authored by Eeman Al-Ameen, Ana Blanco-AlvarezAna Blanco-Alvarez, Sergio Cavalaro

Sprayed concrete relies on the presence of an accelerator to set rapidly in place and achieve adequate geometric stability. This significantly reduces its strength, workability, and limits its application to specialised projects whereby the technical advantages of spraying outweigh the limitations rendering it more suitable over conventional placing methods. This study proposes the development of a novel sprayed ultra-high-performance concrete (SUHPC), suited for the application of complex shaped structures, utilising high glass fibre content and thin section requirements to achieve geometric stability. The study assesses the effects of fibre content on the mechanical, permeability, and durability performance of the developed SUHPC, and provides an assessment of its feasibility for spraying complex shaped free form architectural structures. The study found that incorporating high fibre contents in excess of 2 vol% allowed the mix to maintain geometric stability, while attaining ultra-high compressive strengths of up to 144 MPa. Meanwhile the durability and permeability performance remained above the typical threshold for typical UHPC. This study allows the revitalisation of UHPC for sprayed applications, incorporating an all-in-one architectural and structural design solution.

Funding

Loughborough University

Specwall

History

School

  • Architecture, Building and Civil Engineering

Published in

Construction and Building Materials

Volume

407

Publisher

Elsevier

Version

  • AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Construction and Building Materials and the definitive published version is available at https://doi.org/10.1016/j.conbuildmat.2023.133393

Acceptance date

2023-09-15

Publication date

2023-09-27

Copyright date

2023

ISSN

0950-0618

eISSN

1879-0526

Language

  • en

Depositor

Dr Ana Blanco Alvarez. Deposit date: 27 September 2023

Article number

133393

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