<abstract xmlns="http://www.w3.org/1999/xhtml">

This paper presents an investigation on substituting the cement content with an inert material, in a typical locally produced UHPC mix. A structured literature review was performed to enrichen the discussion and to benchmark the results towards already reported investigations in the research society. Investigations on cement substitution in UHPC are frequently reported. However, usually the cement is substituted with other binding materials – often pozzolanic by-products from other industries. Reports from investigations on the use of inert materials for cement substitution in UHPC seem scarce.
An experimental program that included a total of 210 test specimens was executed. This program included evaluating several questions embedded to the problem on how to substitute cement while keeping all other variables constant.
It is concluded that up to 40% of the cement can be substituted with an inert material, without significantly changing the flexural tensile strength or compressive strength of the hardened UHPC. Two preconditions were caretaken: the particle packing was maintained by securing that the substitution material had a Particle Size Distribution (PSD) near identical to the cement and that the water balance was maintained through preconditioning of the substitution material. Suggestions are made for improving benchmarking.
</abstract>

This paper presents an investigation on substituting the cement content with an inert material, in a typical locally produced UHPC mix. A structured literature review was performed to enrichen the discussion and to benchmark the results towards already reported investigations in the research society. Investigations on cement substitution in UHPC are frequently reported. However, usually the cement is substituted with other binding materials – often pozzolanic by-products from other industries. Reports from investigations on the use of inert materials for cement substitution in UHPC seem scarce.
An experimental program that included a total of 210 test specimens was executed. This program included evaluating several questions embedded to the problem on how to substitute cement while keeping all other variables constant.
It is concluded that up to 40% of the cement can be substituted with an inert material, without significantly changing the flexural tensile strength or compressive strength of the hardened UHPC. Two preconditions were caretaken: the particle packing was maintained by securing that the substitution material had a Particle Size Distribution (PSD) near identical to the cement and that the water balance was maintained through preconditioning of the substitution material. Suggestions are made for improving benchmarking.

Towards Efficient Use of Cement in Ultra High Performance Concrete

M.Sc, Assistant Professor, PhD Candidate, Department of Engineering sciences, Faculty of Engineering and Science

Professor, Department of Engineering sciences, Faculty of Engineering and Science

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Towards Efficient Use of Cement in Ultra High Performance Concrete"}

This paper presents an investigation on substituting the cement content with an inert material, in a typical locally produced UHPC mix. A structured literature...

Towards Efficient Use of Cement in Ultra High Performance Concrete

Published Online: Dec 30, 2021

Page range: 81 - 105

Received: Oct 05, 2021

Accepted: Dec 01, 2021

DOI: https://doi.org/10.2478/ncr-2021-0017

Keywords
UHPC, Cement substitution, Inert material, Circular economy, Cement and CO efficiency indexing

© 2021 Ingrid Lande et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Towards Efficient Use of Cement in Ultra High Performance Concrete

Published Online: Dec 30, 2021

Page range: 81 - 105

Received: Oct 05, 2021

Accepted: Dec 01, 2021

DOI: https://doi.org/10.2478/ncr-2021-0017

KeywordsUHPC, Cement substitution, Inert material, Circular economy, Cement and CO efficiency indexing

© 2021 Ingrid Lande et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
UHPC, Cement substitution, Inert material, Circular economy, Cement and CO efficiency indexing