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Influence of fine recycled concrete aggregates in the design and properties of UHPC
RISE - Research Institutes of Sweden, Built Environment, CBI Swedish Cement and Concrete Research Institute.
RISE - Research Institutes of Sweden, Built Environment, CBI Swedish Cement and Concrete Research Institute.
2019 (English)In: Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, International Federation for Structural Concrete , 2019, p. 165-172Conference paper, Published paper (Refereed)
Abstract [en]

The properties of UHPC containing fine recycled concrete aggregates (FRCA) are investigated. FRCA in the particle range 0.125-2 mm in diameter were used. The water-binder ratio was kept constant for all mixes. Natural crushed aggregates (NCA) were replaced by 0%, 25%, 50%,75% and 100% FRCA. Autogenous shrinkage decreased by 16-45% with an increase in the amount of FRCA whereas drying shrinkage increased by 12-33%. Generally, there was strength increase of 4-17% for concrete containing FRCA after 1 day. However, after 28 days the difference is negligible. Hydration kinetics were not affected by the replacement of NCA by FRCA.

Place, publisher, year, edition, pages
International Federation for Structural Concrete , 2019. p. 165-172
Keywords [en]
Mechanical properties, Recycled aggregates, Shrinkage, UHPC, Concretes, Recycling, Autogenous shrinkage, Crushed aggregates, Drying shrinkages, Hydration kinetics, Recycled concrete aggregates, Water binder ratio, Concrete aggregates
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38963Scopus ID: 2-s2.0-85066083803ISBN: 9782940643004 (print)OAI: oai:DiVA.org:ri-38963DiVA, id: diva2:1324637
Conference
fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, 27 May 2019 through 29 May 2019
Note

Funding details: Center for Bioenergy Innovation; Funding text 1: The authors would like to thank for the financial support of RISE CBI Betonginstitutet´s industrial consortium consisting of Cementa, Färdig Betong, Abetong, Strängbetong, Betongindustri and Swerock and the fruitful discussions with the reference group of the consortium.

Available from: 2019-06-14 Created: 2019-06-14 Last updated: 2019-06-14Bibliographically approved

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CiteExportLink to record
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