Nordic Concrete Research – Publ. No. NCR 65 – ISSUE 2 / 2021 – Article 5, pp. 81-105 81 © Article authors. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivs licens. (http://creaticecommons.org/licenses/by.nc-nd/3.0/). ISSN online 2545-2819 ISSN print 0800-6377 DOI: 10.2478/ncr-2021-0017 Received: Oct. 5, 2021 Revision received: Dec. 1, 2021 Accepted: Dec. 1, 2021 Towards Efficient Use of Cement in Ultra High Performance Concrete Ingrid Lande M.Sc, Assistant Professor, PhD Candidate Department of Engineering sciences Faculty of Engineering and Science University of Agder Jon Lilletuns vei 9, 4879 Grimstad e-mail: [email protected] Rein Terje Thorstensen Professor Department of Engineering sciences Faculty of Engineering and Science University of Agder Jon Lilletuns vei 9, 4879 Grimstad e-mail: [email protected] 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.