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Influence of Natural Aggregate Crushing Process on Crushing Strength Index

Author

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  • Andrzej Pacana

    (Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland)

  • Dominika Siwiec

    (Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland)

  • Lucia Bednarova

    (Faculty of Mining, Ecology, Process Control and Geotechnologies, Technical University of Kosice, Letna 9, 04200 Kosice, Slovakia)

  • Marian Sofranko

    (Faculty of Mining, Ecology, Process Control and Geotechnologies, Technical University of Kosice, Letna 9, 04200 Kosice, Slovakia)

  • Olga Vegsoova

    (Faculty of Mining, Ecology, Process Control and Geotechnologies, Technical University of Kosice, Letna 9, 04200 Kosice, Slovakia)

  • Martin Cvoliga

    (Faculty of Mining, Ecology, Process Control and Geotechnologies, Technical University of Kosice, Letna 9, 04200 Kosice, Slovakia)

Abstract

Crushing is one of the most energy-consuming technological processes. The purpose of grinding is to achieve the desired grain size of mineral raw materials. The process of grinding consists of many factors, for example, the size and form of crushed grains, as well as their mutual arrangement inside the crushing machine chamber, the technological parameters of the crusher, the material properties, and the speed of the moving grains. One of the key parameters of the aggregate is its resistance to grinding. Resistance to grinding is related to the strength of the products made from aggregates subjected to grinding, which affects the overall quality of these products. Therefore, the aim of this study is to analyze the impact of the crushing of natural aggregate on the LA crumbling strength index. Two types of aggregates were analyzed—natural gravel and natural pebbles crushed in a crusher. Aggregates were acquired from two mines belonging to the plant Kruszgeo S.A. in Rzeszów, i.e., ZEK (Zakład Eksploatacji Kruszywa) Ostrów and ZEK Strzegocice II. The aggregate crushing process was carried out for 4–8 mm and 10–14 mm fractions using cone crushers of the 1044 type. Aggregate crushing was carried out in a Los Angeles drum, in accordance with the requirements of EN 1097-2:2020. The analysis showed that for grits of the 10–14 mm fraction, the lower values of the LA indices were obtained, which allows for obtaining a bigger index of crushing strength than in the case of crushing using the 4–8 mm fraction. This analysis showed how important the process of grinding aggregates is and, thus, the appropriate selection of fractions for the grit crushing process for the aggregate strength on grinding. Subjecting the aggregate to the grinding process results in an improvement in the crushing strength indicator, thus obtaining better strength parameters of the products manufactured from the aggregates subjected to the process of crushing (for example, concrete). The originality of the study is an analysis of key Polish aggregates and the crushing strength index.

Suggested Citation

  • Andrzej Pacana & Dominika Siwiec & Lucia Bednarova & Marian Sofranko & Olga Vegsoova & Martin Cvoliga, 2021. "Influence of Natural Aggregate Crushing Process on Crushing Strength Index," Sustainability, MDPI, vol. 13(15), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:15:p:8353-:d:602082
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    References listed on IDEAS

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    1. Dominika Siwiec & Andrzej Pacana, 2021. "A Pro-Environmental Method of Sample Size Determination to Predict the Quality Level of Products Considering Current Customers’ Expectations," Sustainability, MDPI, vol. 13(10), pages 1-22, May.
    2. Robert Ulewicz & Dominika Siwiec & Andrzej Pacana & Magdalena Tutak & Jarosław Brodny, 2021. "Multi-Criteria Method for the Selection of Renewable Energy Sources in the Polish Industrial Sector," Energies, MDPI, vol. 14(9), pages 1-30, April.
    3. Andrzej Pacana & Dominika Siwiec & Lucia Bednárová, 2020. "Method of Choice: A Fluorescent Penetrant Taking into Account Sustainability Criteria," Sustainability, MDPI, vol. 12(14), pages 1-21, July.
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    1. Vitalii P. Kondrakhin & Nikita V. Martyushev & Roman V. Klyuev & Svetlana N. Sorokova & Egor A. Efremenkov & Denis V. Valuev & Qi Mengxu, 2023. "Mathematical Modeling and Multi-Criteria Optimization of Design Parameters for the Gyratory Crusher," Mathematics, MDPI, vol. 11(10), pages 1-16, May.

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