Besides, the autogenous shrinkage, compressive strength, and elastic modulus of the two types of concrete, with and without SAP, were also investigated and highlighted. The good agreement between the model predictions and test results suggests an acceptable predictive capability of the modified model. Subsequently, the model, with parameters so determined, was used to predict the specific basic tensile creep for specimens loaded at 6 days and 14 days. The model parameters were first determined through best-fitting with the measured creep data for reference specimens loaded at 1 day. A modified MC2010 model was then proposed to more realistically reflect short-term tensile creep characteristics of early-age concrete with and without SAP.
Ceb fip model code 2010 pdf code#
From this input DIANA derives the required properties for the cracking functions of the CEB-FIP Model Code 1990, e.g. Possible maximum aggregate sizes are 8, 16, or 32 mm. DMAX dmax is the maximum aggregate size of concrete in mm. The main goal of this paper is to describe the mechanical behavior of the CDW recycled concrete in compression, using an isotropic damage model adapted to the variation of the replacement rate of natural aggregates by recycled ones. The applicability of using the B3 model and the MC2010 model to predict the basic tensile creep of early-age concrete was examined. CRACKN indicates that the cracking functions according to the European CEB-FIP Model Code 1990 will be used. The fib (International Federation for Structural Concrete), formed by 45 national member groups and approximately 1,000 individual or corporate members, is a not-for-profit association committed to. a Department of Construction Engineering, Universitat Politècnica de Catalunya, UPC, Jordi Girona 1-3, 08034 Barcelona, Spain. Ana Blanco a, Pablo Pujadas a, Albert de la Fuente, Sergio Cavalaro, Antonio Aguado. The higher basic tensile creep of early-age concrete with SAP may be due mainly to the formation of large air voids, delayed cement hydration, and also higher internal relative humidity. Application of constitutive models in European codes to RC-FRC. Concrete with SAP exhibited higher basic tensile creep than the reference concrete without SAP when first being loaded at 1 day, 6 days, and 14 days. Abstracts for fib Bulletins, lists of available CEB Bulletins and FIP Reports. 55 fib Model Code 2010, First complete draft Volume 1.
Ceb fip model code 2010 pdf pdf#
In this model code relations are also proposed to predict fracture properties of concrete on the basis of fracture mechanics concepts. This PDF of fib Bulletin 64 is intended for use and/or distribution solely within fib National Member. In this paper, through direct tensile testing, the basic tensile creep of concrete with a water-to-binder ratio of 0.35 and containing 0.3% SAP (by mass of binder) loaded at early ages was studied. The new model code for the design of concrete structures of the Comite Euro-International du Béton (CEB) includes extensive information on constitutive relations for concrete and reinforcing steel. Despite substantial previous research, the impact of SAP on the basic tensile creep of early-age concrete is hardly investigated. Internal curing with superabsorbent polymers (SAP) significantly affects both deformational and mechanical properties of cement-based composites at early ages.
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