UHPFRC tensile creep at early age

• Published in: Materials and structures Vol. 42; no. 1; pp. 113 - 122
• Main Authors: Kamen, A., Denarié, E., Sadouki, H., Brühwiler, E.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2009; Springer
• Subjects: Age; Applied sciences; Building Materials; Buildings. Public works; Civil Engineering; Concretes. Mortars. Grouts; Creep (materials); Engineering; Exact sciences and technology; Machines; Manufacturing; Materials; Materials Science; Mathematical models; Original Article; Other special applications (sand concrete, roller compacted concrete, heavy concrete, architectural concrete, etc.); Pastes; Processes; Properties and performance of fresh concrete; Shrinkage; Solid Mechanics; Strength of materials (elasticity, plasticity, buckling, etc.); Structural analysis. Stresses; Tensile creep; Tensile strength; Theoretical and Applied Mechanics; Viscoelasticity; Early age; UHPFRC; Tensile creep; Numerical model; Creep; Construction materials; Tensile property; Shrinkage; Green concrete; Experimental study; Modeling; Fiber reinforced concrete; Numerical simulation; Chemical composition; High strength concrete
• ISSN: 1359-5997; 1871-6873
• DOI: 10.1617/s11527-008-9371-0

Ultra high performance fibre reinforced concrete (UHPFRC) early age viscoelastic behaviour under tension was investigated. The tests results showed a high creep potential due to the high volume paste (88%). This result is of major importance because the viscoelastic properties contribute to mitigating the high early age stresses generated under restrained shrinkage. This beneficial effect was reflected by the increased linear-relationship between tensile creep and shrinkage. As expected, UHPFRC tensile creep behaviour was also sensitive to the loading level. Above 35% of the tensile strength at the loading age, the material exhibited viscoplastic behaviour. A Maxwell chain model was applied to predict the early age UHPFRC tensile creep and confirms the induced non-linear response.