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.
Results
Showing 1 to 13 of 13 for “"fresh and hardened properties"”.
-
Mix design, fresh and hardened properties and microstructural characterisation of alkali-activated concrete based on PFA/GGBS blends
… (AAC) has recently emerged as a potential candidate to replace the conventional Portland cement concrete (PCC) in several applications due to its low CO2 footprint and promising mechanical properties. However, the robustness and the good reputation PCC has gained over the years make it …
-
The effects of Visual Stability Index (VSI) on fresh and hardened properties of Self Consolidating Concrete (SCC) under accelerated curing condition
… highly flowable concrete that spreads into place and fills formwork without the need for mechanical vibration. SCC reduces the time and labor cost needed for concrete placement. This study is part of the proposed project by Tennessee Department of Transportation (TDOT) carried out by University of …
-
A Compilation of Research on Self-Consolidating Concrete for Prestressed Bridge Girders
… procedures by freely flowing, filling space and passing through dense reinforcement without vibration mechanism. Meanwhile, SCC has also been used in other applications such as the precast industry, where the benefits of the workability SCC delivers can be utilized to improve fabrication of …
-
DEVELOPMENT AND APPLICATION OF ENSEMBLE MACHINE LEARNING ALGORITHMS TO ENABLE A PRIORI, HIGH-FIDELITY, AND PROMPT PREDICTIONS AND OPTIMIZATIONS OF COMPLEX MATERIALS AND SYSTEMS
… due to substantial variations in precursors and processing techniques, it has been challenging to develop theoretical frameworks (i.e., empirical models) that could produce reliable predictions of properties of complex materials. In recent years, scientists have harnessed the power of machine …
-
The viability of using gold mine tailings as a substitute for fine aggregate in concrete mixes
Urbanization has caused an increase in demand for building materials, some of which requires mined natural resources. These materials produce large volumes of mining wastes (also known as tailings) which have environmental and economic implications. This research investigates the potential of …
-
Using untreated and nanobubble-treated potable and wastewater in mortar
The construction sector places a significant demand on potable freshwater resources, with more than two billion tonnes of water used each year for producing concrete. The increase in population growth, demand for infrastructure, and climate-induced water scarcity, especially in arid and semi-arid …
-
Platinum Slag as Fine Aggregate in Concrete for Coastal Applications
… has intensified pressure on natural sand resources, with annual extraction estimated at approximately 50 billion tonnes. Extensive sand mining is linked to biodiversity loss, land degradation, and coastal erosion, impacts that are particularly acute in South Africa’s coastal regions, …
-
High-performance carbonatable cementitious systems: novel materials and processing methods
… carbon dioxide (CO2) to form stable, durable, and environmentally friendly carbonate materials. Despite a wealth of literacy and the major technological developments related to CCMs in recent decades, the expanded use of these eco-friendly materials depends on addressing their fundamental …
-
Carbonated foamed cellular concrete
FCC is a class of cementitious material whose fresh and hardened properties are primarily controlled by the quantity of stabilized air bubbles in the paste. The density of cellular concrete usually ranges from 300 kg/m3 to 1800 kg/m3 and has been used for applications such as thermal insulation, …
-
The performance of a blended PFA/GGBS alkali-activated concrete using a silica fume-based activator
… concern with the ever-increasing use of Portland cement and associated carbon emissions due to urban development expansion worldwide. Hence, extensive research has been undertaken into ‘’’cement-free’’ alternative concrete has emerged in the academic and commercial space also known as …
-
Macro - and Microstructure Evaluation and Field Applications of Concrete with Recycled Glass Pozzolan
… Conventional concrete is produced with Portland cement (PC). The production of cement is an energy intensive operation that has raised significant environmental concerns, since one ton of cement generates an equal ton of CO<sub>2</sub>. In the USA about 90 million tons of cement are used …
-
Self-Compacting Concrete for Prestressed Bridge Girders
… from conventional concrete especially in its fresh state, is a highly workable concrete that flows through congested reinforcement under its own weight alone, filling the formwork without segregation of its constituent materials with a void-free structure, and can be placed without any …
-
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 …