Performance evaluation of steel-polypropylene hybrid fiber reinforced concrete under supercritical carbonation

Bao, Hao and Yu, Min and Chi, Yin and Liu, Yu and Ye, Jianqiao (2021) Performance evaluation of steel-polypropylene hybrid fiber reinforced concrete under supercritical carbonation. Journal of Building Engineering, 43: 103159. ISSN 2352-7102

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Abstract

In this paper, systematic supercritical carbonation tests of steel-polypropylene hybrid fiber reinforced concrete (SPFRC) were carried out to evaluate the performance of SPFRC under supercritical condition. The effects of the length-diameter ratio of steel fiber, volume fraction of steel fiber, and polypropylene fiber on the carbonation depth and compressive strength of concrete under supercritical condition were studied. A one-dimensional mathematical model for the physical-chemical coupling process of supercritical carbonation of cement-based materials was established. The relational model between the equivalent porosity and the compressive strength of fully carbonated SPFRC was also proposed. Results indicate that whether the addition of steel fibers or polypropylene fibers or the inclusion of fibers can accelerate the carbonation process by the increase of porosity. The carbonation depths of SPFRC increase with the increase of the addition of steel fibers and polypropylene fibers. The compressive strength after carbonation is significantly increased. The maximum relative compressive strength was obtained when the volume fraction of steel fibers and polypropylene fibers were 1.5% and 0.0% and the length-diameter ratio of steel fiber was 60, respectively. Furthermore, a mathematical model was proposed to evaluate the equivalent initial porosity of SPFRC.

Item Type:

Journal Article

Journal or Publication Title:

Journal of Building Engineering

Additional Information:

This is the author’s version of a work that was accepted for publication in Journal of Building Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Building Engineering, 43, 2021 DOI: 10.1016/j.jobe.2021/103159

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2200/2205

Subjects:

?? carbonation depthcompressive strengthpolypropylene fiberssteel fiberssupercritical carbonationcivil and structural engineeringarchitecture building and constructionsafety, risk, reliability and qualitymechanics of materials ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

188496

Deposited By:

ep_importer_pure

Deposited On:

10 Mar 2023 13:15

Refereed?:

Yes

Published?:

Published

Last Modified:

12 Feb 2024 00:46

URI:

https://eprints.lancs.ac.uk/id/eprint/188496