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Showing 1 to 12 of 12 for “"shrinkage and creep"”.
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Compliance, relaxation and creep recovery of normal strength concrete.
… the long duration properties of concrete are shrinkage and creep of concrete. At relative humidities less than 96--99% concrete shrinks. For concrete, creep is the deformation under load after having subtracted the shrinkage and elastic deformation. For specimens loaded in a drying environment …
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Estudio sobre la aplicabilidad de los modelos de cálculo de la fluencia y retracción al hormigón autocompactable
… fluencia con los resultados experimentales utilizando varios métodos estadísticos, con el fin de evaluar si los modelos actuales son adecuados para estimar las deformaciones del HAC. Como conclusiones se determina que no existe la necesidad de modificar los modelos actuales de cálculo de la …
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Investigation of Concrete Mixtures to Reduce Differential Shrinkage Cracking in Composite Bridges
… mixture that resists the effects of differential shrinkage by decreasing shrinkage and increasing creep. . In addition, the amount of tensile creep that concrete experiences under long-term tensile stresses were quantified and compared to compressive creep values in order to gain a better …
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Numerical Simulation of Reinforced Concrete Subjected to Multiaxial Stress Conditions
… aggregate interlock, bond slip, dowel action, shrinkage and creep. Because the reinforced concrete involves so many nonlinear phenomena interacting with one another, the formulation of a "complete" analytical model is very difficult. The focus of this study is cast on: (1) three dimensional …
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Time-dependent losses in post-tensioned prestressed concrete
… time-dependent deformations, prestress losses and deflections of Class 1 uncracked prestressed concrete beams. The main influencing factors considered were environmental conditions, loading conditions,size and shape of members and concrete mix composition. Twenty seven beams consisting of both …
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Time dependent flexural analysis of reinforced concrete members
… effect in the long term serviceability and durability. Reinforced concrete (RC) members are prone to the effect of time dependent deformations that are known as shrinkage and creep, can produce substantial deformations and deflections to the structure. The mechanics of quantifying the …
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Effectiveness of high strength repair mortars in structural patch repairs of concrete members under axial compression
There is a dearth of knowledge and research into the performance and efficacy of repair materials used in structural concrete patch repair applications. The repercussions of this have led to the development of repair standards and guidelines that fail to adequately cover requirements for structural …
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Investigation of Concrete Mixtures to Reduce Differential Shrinkage Cracking in Inverted T Beam System
… enhanced performance against reflective cracking and reduces the likelihood of cracking due to time dependent effects. Differential shrinkage is believed to be one of the causes of deck cracking in inverted T-beam systems. The objective of this study was to develop mix designs that exhibit lower …
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Development of a Composite Concrete Bridge System for Short-to-Medium-Span Bridges
… performance against reflective cracking, and reduces the likelihood of cracking due to time dependent effects. The effects of transverse bending due to concentrated wheel loads are investigated with respect to reflective cracking. Transverse bending moment are quantified and compared to …
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Characterisation and properties of alkali activated pozzolanic materials.
… is blast furnace slag from the smelting of iron and steel. The US produces 26 million tons of blast furnace slag annually. Most of the slag is slowly cooled in air and it makes a poor pozzolan. Only 1.6 million tons of the slag is available in the granulated form, which is suitable as a …
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Dosificación, propiedades y durabilidad en hormigón autocompactante para edificación
… fluir y rellenar correctamente el encofrado, pasando a través de las armaduras. Estos hormigones poseen la ventaja de eliminar la compactación manual y evitar los problemas de ruido, molestias a operarios, etc., que conlleva la compactación mediante vibración, permitiendo rellenar perfectamente …
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Zur physikalisch nichtlinearen Analyse von Verbund-Stabtragwerken unter quasi-statischer Langzeitbeanspruchung
… frameworks in civil engineering is getting more and more complex. By offering reliable and efficient calculation methods, economic goals can be reached as well as the civil engineer's demands. Furthermore, opportunities for special developments are created and acceptance of new building systems …