Plastic Shrinkage Cracking of Self-compacting Concrete: Influence of Capillary Pressure and Dormant Period
| Auteur(s): |
Faez Sayahi
(Div. of Building Materials , Luleå University of Technology , LTU, 971 87 Luleå , Sweden .)
Mats Emborg (Professor LTU/Head R&D Betongindustri AB , 971 87 Luleå, Sweden . /Betongindustri AB, 100 74 Stockholm . mats.emborg@betongindustri.se) Hans Hedlund (Adjunct Professor LTU/Skanska Teknik AB , 971 87 Luleå, Sweden/Skanska AB, 405 18 Göteborg , Sweden hans.hedlund@ltu.se) Andrzej Cwirzen (Professor, Div. of Building Materials , Luleå University of Technology , LTU, 971 87 Luleå , Sweden) |
|---|---|
| Médium: | article de revue |
| Langue(s): | anglais |
| Publié dans: | Nordic Concrete Research, juin 2019, n. 1, v. 60 |
| Page(s): | 67-88 |
| DOI: | 10.2478/ncr-2019-0012 |
| Abstrait: |
This research investigates the effect of capillary pressure and the length of the hydration dormant period on the plastic shrinkage cracking tendency of SCC by studying specimens produced with different w/c ratios, cement types and SP dosages. A relationship between the capillary pressure rate and the length of the hydration dormant period is defined, which can explain the cracking severity of the concrete when the volumetric deformation is unknown. The results show, that the cracking tendency of SCC was the lowest in case of w/c ratio between 0.45 and 0.55, finer and more rapid hardening cement, and lower dosage of SP. The dormant period was prolonged by increasing the w/c ratio, using coarser cement, and higher SP dosage. It was concluded that the cracking tendency of concrete is a function of the capillary pressure buildup rate and the length of the dormant period. |
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sur cette fiche - Reference-ID
10705851 - Publié(e) le:
19.02.2023 - Modifié(e) le:
19.02.2023
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