Global ETD Search
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 8 of 8 for “"Concrete--Microstructure"”.
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Concrete microstructure homogenization technique with application to model concrete serviceability
Conventionally, mechanical properties of concrete are attained through experiment by leaving microstructural phases interaction in a black box. To fully understand concrete, it is necessary to bridge the gap between microstructure and macro properties. In this dissertation, with several models …
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Moisture measurements in concrete and characterization using impedance spectroscopy and RC network circuits
The importance of moisture in concrete is unquestionable. However, quantifying the moisture in concrete is very difficult as concrete microstructure water interactions are not well understood. Concrete is a very complex material spanning the range from the atom to the civil infrastructure. It is …
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Applications of finite element method in studying mechanical behavior of concrete materials on different scales
… different scales. The first study considers the microstructure of foam concrete material. The objective is providing insights for understanding the foam concrete crushing behavior, where the real foam concrete microstructure is studied. With a micro-CT scan providing the foam geometry …
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Thermo-chemo-mechanical modelling of hydropower structures affected by alkali silica reaction
… of water inducing internal pressures within the concrete microstructure resulting in cracking and a reduction in elastic properties of concrete. Thus, ASR can substantially reduce serviceability and compromise the safety of concrete structures. To ensure the safe operation of these ageing …
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The elastic properties of calcium leached cement pastes and mortars : a multi-scale investigation
Calcium leaching induced aging in concrete creates a new material with degraded macroscopic mechanical properties. Although the degradation of strength has been elaborately studied in the last decade, the degradation of elasticity has not been investigated in the same depth. This thesis presents a …
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Durability of Cementitious Materials in Arctic Regions: Investigating Freeze-Thaw Damage and Chloride Ingress Diffusion Mechanisms
Concrete infrastructure in the Arctic coastal region faces durability challenges from freeze-thaw (F-T) cycles and chloride ingress due to seawater and deicing salts, resulting in surface scaling, spalling, and cracking. Climate change exacerbates these issues, particularly in high-latitude areas …
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Powder packing optimisation for clinker reduction in concrete
Globally, concrete is the most used construction material. Its embodied energy is relatively low, yet due to the vast quantities that are produced annually, it has substantial greenhouse gas (GHG) emissions associated with it. Of the concrete constituents, the manufacture of clinker - the basis of …
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Interfacial transition zone composition and bonding in cementitious materials with asphalt-coated particles
… as a partial replacement of coarse aggregate in concrete paving mixtures has seen recent interest as a result of significant availability of stockpiles of RAP materials. While previous research has primarily focused on the mechanical and durability properties of concrete with RAP aggregates, this …