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Related Concept Videos

Design Example: Aggregate Gradation01:24

Design Example: Aggregate Gradation

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The right type and quality of aggregates are crucial for concrete as they significantly influence its properties, mix proportions, and cost-effectiveness. If different sources are available for sand, the commonly used fine aggregate in concrete, the selection of sand is primarily based on its gradation.
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
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Unsoundness of Aggregate due to Volume Change01:26

Unsoundness of Aggregate due to Volume Change

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Unsoundness in aggregates due to volume changes is primarily caused by the physical alterations aggregates undergo, such as freezing and thawing, thermal changes, and wetting and drying. Unsound aggregates, when subjected to these changes, result in volume change upon disintegration. This, in turn, contributes to the deterioration of concrete, including scaling, pop-outs, and cracking. Particular types of aggregates, such as porous flints, cherts, and those containing clay minerals, are...
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Maximum Size of Aggregate01:12

Maximum Size of Aggregate

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The maximum size of aggregate is defined as the aperture of the sieve retaining 15 percent or more of the particles present in the aggregate sample. The aggregate's maximum size impacts the concrete's water requirement, workability, and strength. Larger aggregates reduce the surface area needing cement paste coverage, which can lower water needs, thereby allowing a decrease in the water-to-cement ratio when the desired workability and richness of the mix are to be maintained, which can...
139
Shape and Texture of Coarse Aggregate01:25

Shape and Texture of Coarse Aggregate

219
Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...
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Types of Aggregate Grading01:15

Types of Aggregate Grading

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Aggregate grading is crucial in economically obtaining a concrete mix with adequate strength, reasonable workability, and minimal segregation. There are four types of aggregate gradation: well-graded, uniformly (or one-sized) graded, gap-graded, and open-graded.
Well-graded aggregates include a complete range of necessary size fractions that fit together to create a dense matrix with minimal voids, represented by a smooth, continuous gradation curve. This type of grading ensures good...
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Aggregates Classification01:29

Aggregates Classification

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Aggregate classification is generally based on its size, petrographic characteristics, weight, and source. Size classification ranges from coarse to fine aggregates, defined by the size of the particles. Coarse aggregates are particles that do not pass through ASTM sieve No. 4, and aggregates that pass through the sieve are fine aggregates.
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
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Dataopsy: Scalable and Fluid Visual Exploration using Aggregate Query Sculpting.

Md Naimul Hoque, Niklas Elmqvist

    IEEE Transactions on Visualization and Computer Graphics
    |October 23, 2023
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    Summary
    This summary is machine-generated.

    Aggregate Query Sculpting (AQS) is a scalable visual technique for exploring large multidimensional datasets. It enables progressive data exploration through a series of six operations, enhancing user interaction and data analysis.

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    Area of Science:

    • Information Visualization
    • Human-Computer Interaction
    • Data Science

    Background:

    • Large-scale multidimensional datasets pose significant challenges for traditional data exploration methods.
    • Existing visual query techniques often struggle with scalability and fluid interaction.

    Purpose of the Study:

    • To introduce Aggregate Query Sculpting (AQS), a novel faceted visual query technique designed for "born scalable" exploration of large multidimensional data.
    • To present DATAOPSY, a prototype implementation of AQS facilitating fluid interaction on various devices.

    Main Methods:

    • AQS utilizes a single visual mark for initial dataset aggregation, allowing progressive exploration.
    • The P6 operations (pivot, partition, peek, pile, project, prune) enable users to interactively refine and explore data subsets.
    • DATAOPSY prototype supports fluid interaction on desktop and touch-based mobile devices.

    Main Results:

    • AQS demonstrates scalability for analyzing large, multidimensional datasets.
    • The P6 operations provide a structured yet flexible framework for visual querying.
    • Case studies and application examples illustrate the effectiveness of AQS and DATAOPSY.

    Conclusions:

    • AQS offers a powerful and scalable approach to visual querying for large multidimensional data.
    • The DATAOPSY prototype validates the practical application and usability of AQS.
    • This technique enhances data exploration capabilities for researchers and analysts.