The properties improvement of UHPC incorporation cellulose fiber and the autogenous shrinkage reduction mechanism with internal curing effect
Internal curing has been proven to be an efficient way to inhibit shrinkage of ultra-high performance concrete (UHPC). Cellulose fiber (CF), which has a hydrophilic surface and lumen structure, is a suitable internal curing agent without self-volume deformation. However, studies about CF on autogeno...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425002054 |
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| Summary: | Internal curing has been proven to be an efficient way to inhibit shrinkage of ultra-high performance concrete (UHPC). Cellulose fiber (CF), which has a hydrophilic surface and lumen structure, is a suitable internal curing agent without self-volume deformation. However, studies about CF on autogenous shrinkage are limited and the shrinkage reduction mechanism is still unclear. In this study, the humidity control of CF and their effects on UHPC properties were investigated. CF increased absorption of the superplasticizer, resulted to the shorter setting time. The change of fluidity and strength of UHPC with CF was less than 5% with different CF dosage. The early autogenous shrinkage of UHPC can be divided into six stages, and in each stage, the shrinkage of UHPC with CF was reduced, especially in stage IV, the AFt intermediate product growth larger due to the absorption of superplasticizer, which offset 82.7 % of the shrinkage in maximum. The total autogenous shrinkage was reduced to 345 × 10−6 at minimum, compared to the 990 × 10−6 for the control group. |
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| ISSN: | 2238-7854 |