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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Differential Shrinkage"”.
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Long-term performance of bonded concrete overlays subjected to differential shrinkage
… failure mechanisms are largely a result of differential volume changes between substrate and overlay. The objective of this research was to develop analytical tools to facilitate the design of bonded overlays subjected to differential shrinkage. The experimental programme included the …
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Investigation of Concrete Mixtures to Reduce Differential Shrinkage Cracking in Composite Bridges
… deck topping 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 …
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Investigation of Concrete Mixtures to Reduce Differential Shrinkage Cracking in Inverted T Beam System
… 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 shrinkage and higher creep compared to typical deck mixtures, recommend …
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Development of a Composite Concrete Bridge System for Short-to-Medium-Span Bridges
… these tensile stresses are proposed. Because differential shrinkage is believed to be one of the causes of deck cracking in composite bridges, a study on shrinkage and creep properties of seven deck mixes is presented with the goal of identifying a mix whose long terms properties reduce the …
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Optimizing the content and gradation of recycled tyre rubber particles to improve cracking resistance of concrete mortars
… concrete mortars usually experience substantial differential shrinkage that causes the build-up of internal tensile stress. Shrinkage cracking often happens if the concrete mortar does not exhibit sufficient tensile strength to sustain these stresses. The ingress of aggressive agents that may …
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Moisture Gradient Measurement During Kiln Drying of Red Oak
… of restraints imposed by moisture gradients and differential shrinkage in wood. So accurately measuring the moisture gradient in wood during drying will be helpful to improving drying quality. In this project, moisture gradients in red oak will be measured through four different …
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The use of 3D surface analysis techniques to investigate the wear of matt surface finish femoral stems in total hip replacement
… geometric change presented itself in the form of differential shrinkage. This shrinkage of cement was observed initially through 3D surface topography analysis and later confirmed with geometric measurement techniques. The presence of voids between stem and cement give rise to the possibility of …
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Investigating repair mortars containing superabsorbent polymers as a method of internal curing to improve concrete patch repair performance
… develop between the new and old concrete due to differential shrinkage between the concrete substrate and overlay. These differential shrinkages typically result in the build - up of tensile stresses within the overlay. If the concrete does not possess sufficient tensile strength, the overlay …
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Assessing the age at cracking of concrete repair mortars
… and hygral differences in the two composites, differential shrinkage occurs. This leads to overlay shrinkage restraint by the relatively mature substrate. Restrained shrinkage in bonded overlays can cause stress build up and may result in cracking. Cracking due to restrained deformation is a …
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Influence of substrate moisture preparation on concrete overlay bond strength
… roughness and equally aged to prevent any differential shrinkage which may falsify bond strength readings. The bond strength results were plotted, statistically evaluated and compared with existing literature.
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Design and Behavior of Precast, Prestressed Girders Made Continuous — An Analytical and Experimental Study
… of the deck during curing and subsequent differential shrinkage; however, the magnitudes of the early age restraint moments are much less than conventional analyses predict.