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Related Concept Videos

Quarrying of Stone01:15

Quarrying of Stone

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Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the...
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Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in...
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Yield Criteria for Ductile Materials under Plane Stress01:25

Yield Criteria for Ductile Materials under Plane Stress

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In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
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Unsoundness of Aggregate due to Volume Change01:26

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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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Design Example: Dimensioning of Concrete Masonry Construction01:13

Design Example: Dimensioning of Concrete Masonry Construction

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For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
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Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
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Related Experiment Video

Updated: Jun 13, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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Development a risk assessment method for dimensional stone quarries.

Mojtaba Yari1, Saeed Jamali2,3, Gamil M S Abdullah4,5

  • 1Department of Mining Engineering, Faculty of Engineering, Malayer University, Malayer, Iran. m.yari.academic@gmail.com.

Scientific Reports
|September 16, 2024
PubMed
Summary
This summary is machine-generated.

Dimension stone quarrying faces significant hazards. This study details a risk breakdown structure and uses the VIKOR method to identify economic, management, and schedule risks as most threatening in marble mines.

Keywords:
Dimensional stoneFuzzy-AHPFuzzy-VIKORRBSRisk assessment

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Area of Science:

  • Mining Engineering
  • Risk Management
  • Geosciences

Background:

  • Global dimension stone production has surged in the last 20 years, with seven countries dominating output.
  • Mining operations, particularly in dimension stone quarries, are inherently hazardous and necessitate robust risk assessment.
  • Existing risk assessment frameworks require adaptation for the unique complexities of dimension stone quarrying.

Purpose of the Study:

  • To develop a comprehensive Risk Breakdown Structure (RBS) specifically for dimension stone quarrying.
  • To prioritize identified risks using multi-attribute decision-making methods.
  • To evaluate the primary risks in a case study marble mine.

Main Methods:

  • A detailed Risk Breakdown Structure was formulated, comprising 17 main levels and 128 sublevels.
  • Multi-attribute decision-making methods were employed to handle the complexity of risk parameter identification.
  • The VIKOR method was applied within a Fuzzy environment to prioritize risks in the Ghasre Dasht marble mine, considering 10 parameters.

Main Results:

  • The study established a granular risk structure for dimension stone quarrying operations.
  • Economic, Management, and Schedule risks were identified as the most critical threats.
  • The VIKOR method effectively prioritized risks in the case study mine under fuzzy conditions.

Conclusions:

  • A structured approach to risk assessment is crucial for the safety and efficiency of dimension stone quarries.
  • Economic, management, and schedule factors represent the highest priority risks requiring mitigation strategies.
  • The developed RBS and applied decision-making methods offer a valuable framework for risk management in the dimension stone industry.