Spelling suggestions: "subject:"concrete creep"" "subject:"concrete greep""
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The anelastic behaviour of concrete under sustained loadsChang, I-Dee January 2011 (has links)
Digitized by Kansas State University Libraries
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Mechanical properties and long-term deformation of slag cement concreteBoukendakdji, Mustapha January 1989 (has links)
No description available.
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A viscoelastic analysis of cement mortar.Brown, Thomas Girvan. January 1970 (has links)
No description available.
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A viscoelastic analysis of cement mortar.Brown, Thomas Girvan. January 1970 (has links)
No description available.
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Creep and pre-stressed concreteOrhun, Atilla January 1960 (has links)
No description available.
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The influence of aggregate stiffness on the measured and predicted creep behaviour of concreteFanourakis, George C January 1998 (has links)
A project report submitted to the Faculty of Engineering, University of the
Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the
degree of Master of Science in Engineering.
Johannesburg, 1998 / Aggregate stiffness is known to influence the magnitude of creep of concrete. The
purpose of this research project was to quantify the influence of aggregate stiffness
on the measured and predicted long-term creep behaviour of plain concrete.
Basic and total creep tests were conducted on concrete specimens of two different
strength grades for each of three different commonly used South African aggregate
types (quartzite, granite and andesite). In addition, elastic modulus tests Were
conducted on cores of the aggregate types considered.
The test results revealed that no correlation exists between the creep of concrete
and the stiffness of the included aggregate. These results appear to be attributable
to the stress-strain behaviour of the aggregate/paste interfacial zone, in the case of
aggregates with an elastic modulus in excess of 70 GPa.
The experimental basic and total creep values from this investigation were
compared with those predicted for each mix at the corresponding ages by the BS
8110 (1985), ACI 209 (1992), AS 3600 (1988), CEB-FIP (1970), CEB-FIP
(1978), CEB-FIP (1990) and the RILEM Model B3 (1995). This comparison
indicated that the results predicted by each model vary widely and that no
correlation exists between the magnitude of the aggregate stiffness and the creep
strains predicted by each model. / MT2017
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An experimental study of creep and shrinkage of exposed limestone aggregate concreteAlt, Darwin F. January 1961 (has links)
This thesis presents an experimental study of creep and shrinkage of concrete made from local limestone aggregate and type III cement. The cylindrical test specimens were exposed to the atmosphere in order to observe the effects that variations of temperature and relative humidity had upon creep and shrinkage. These effects are shown by graphical presentations in the thesis.
Creep strains for the five month period of investigation are shown graphically for each of four conditions of stress, 1000 psi constant stress 1000 psi variable stress 500 psi constant stress, and 500 psi variable stress. Exponential equations for these surveys were derived from the creep data of the five month study. Ultimate creep values were predicted from these equations and are presented together with their respective creep coefficients. These values are given to represent the anticipated creep for limestone aggregate concrete subjected to field conditions. / Master of Science
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Time-dependent behaviour of concrete structures with special referenceto podium and frame structuresLiu, Chi-hong., 廖志航. January 2007 (has links)
published_or_final_version / abstract / Civil Engineering / Doctoral / Doctor of Philosophy
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An assessment of creep formulations for concrete structuresMartore, Joseph Albert. January 1976 (has links)
Thesis: M.S., Massachusetts Institute of Technology, Department of Civil Engineering, 1976 / Bibliography: leaves 126-131. / by Joseph A. Martore. / M.S. / M.S. Massachusetts Institute of Technology, Department of Civil Engineering
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Time Dependent Deformations in Normal And Heavy Density ConcreteReddy, D Harinadha 06 1900 (has links)
Time dependent deformations in concrete, both creep and shrinkage, play a critical role in prestressed concrete structures, such as bridge girders, nuclear containment vessels, etc. These strains result in lossess, through release of prestress, and thereby influence the safety of these structures. The present study comprises of an experimental and analytical program to assess the levels of creep and shrinkage in normal and heavy density concrete. The experimental program includes tests on creep using standard cylinder specimen, while shrinkage studies have been conducted using prism specimen, both under controlled environmental conditions.
The experimental results suggest that creep and shrinkage strains are higher in heavy density concrete than in normal concrete. This may be attributed to the relatively smaller pore structure of heavy density concrete, that results in larger availability of free water and a relatively slower hydration process in comparison to normal concrete. While there is some scatter in the results, creep strains decrease with age of loading and both creep and shrinkage strains are smaller when the relative humidity is higher.
Statistical model reported in the literature for normal concrete is able to predict the test results for both normal and heavy density concrete quite well. Long term predictions of creep and shrinkage using this model, accounting for uncertainties, is also projected and shown to predict some long term measured results not used in the model calibration. The long term predictions are sensitive to the initial data used in model calibration.
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