Shape Characterizing of Aggregates Produced through Different Crushing Techniques

Yaseen, Ghulam; Alaloul, Wesam Salah; Hafeez, Imran; Qureshi, Abdul Hannan

doi:10.3390/coatings11101199

Cited by 7 publications

(2 citation statements)

References 33 publications

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“…Similarly, based on the literature, particles with a grain size of less than 2 mm [ 28 ] are much more elongated and/or flaky than large particles. However, some works encounter assumptions that the shape index does not depend on the particle size [ 50 , 51 ]. The relationship is different for the flakiness index of the basalt aggregate.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the Structure and Geometric Properties of Crushed Igneous Rock Aggregates

Strzałkowski¹,

Duchnowska²,

Kaźmierczak³

et al. 2021

Materials

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The aim of this publication is to analyze the influence of rock mineral composition and rock geometric properties on the quality of crushed aggregates, from the perspective of selecting an adequate aggregate production technology. This research is based on samples of crushed aggregates from plants processing igneous rocks from four different igneous deposits. In the case of the geometric properties, shape and flakiness indexes were identified and subsequently analyzed along with particle size distribution. The performed tests allowed a conclusion that the shape of the particle is influenced by the mineral composition and size distribution. The grain size analysis demonstrated that flaky and non-cubical particles concentrate in the finest grain fractions, and the least variable shape index is observed for basalt aggregate. Some problems were also observed to exist in relation to the classification of grain shape. In the literature, the notions of regular and irregular grains seem to be used interchangeably with the notions of flaky and non-flaky grains. The performed tests show that flaky grains do not necessarily have to be non-cubical and vice versa. Therefore, this article proposes an approach in which the applied technique is precisely explained and the shape of grains is described with four notions: cubical, non-cubical, flaky, and non-flaky. The article also finally concludes that the next step in the research on selecting an optimal production technology of high-quality aggregates should be to analyze the selection of the fragmentation process while also characterizing the geometric properties of the aggregates.

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Section: Resultsmentioning

confidence: 99%

Evaluation of the Structure and Geometric Properties of Crushed Igneous Rock Aggregates

Strzałkowski¹,

Duchnowska²,

Kaźmierczak³

et al. 2021

Materials

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show abstract

“…Therefore, the essence of the recycling technology of RAP at this stage is to select the aggregate through crushing and screening, add the rejuvenator to restore the aged asphalt, and then heat and mix it with a certain proportion of asphalt, new aggregate and other materials to produce a recycled asphalt mixture for pavement structures [5]. However, traditional machines such as jaw crushers or hammer crushers are generally applied for the crushing treatment in the recycling process [6], which causes the excessive refinement of some aggregates and damage to the original gradation of the asphalt mixture. In addition, the simple crushing process cannot effectively separate asphalt and aggregate.…”

Section: Introductionmentioning

confidence: 99%

Developing and Testing of the Principle Prototype for Efficient Micro-Damage Fine Stripping of Asphalt on the Surface of Reclaimed Asphalt Pavement

Zhou

Wang²,

Zhang

et al. 2023

Machines

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In the current recycling process of reclaimed asphalt pavement (RAP), due to the serious damage of aggregate gradation and the large amount of aged asphalt still wrapped around the surface of the treated aggregate, the low recycling rate and poor performance of the recycled asphalt mixture are the major problems of RAP. In view of the shortcomings of RAP recycling technology, it is urgent to research new treatment methods and design specialized asphalt-stripping equipment to solve the existing problems. In this paper, based on theoretical analysis and EDEM discrete element simulation, a principle prototype for efficient micro-damage fine stripping of asphalt on the RAP surface is developed and tested. The results demonstrate that the principle prototype has a satisfactory asphalt-stripping effect and achieves fine stripping of aged asphalt on the surface of aggregate without large-scale crushing. This principle prototype has significant engineering application values, which provides design solutions and data support for further equipment development.

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Stabilization/solidification of sand-washing slurry used for porous cold-bonded ceramsite

Wang¹,

Liu²,

Dong³

et al. 2022

Cement and Concrete Composites

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Shape Characterizing of Aggregates Produced through Different Crushing Techniques

Cited by 7 publications

References 33 publications

Evaluation of the Structure and Geometric Properties of Crushed Igneous Rock Aggregates

Evaluation of the Structure and Geometric Properties of Crushed Igneous Rock Aggregates

Developing and Testing of the Principle Prototype for Efficient Micro-Damage Fine Stripping of Asphalt on the Surface of Reclaimed Asphalt Pavement

Stabilization/solidification of sand-washing slurry used for porous cold-bonded ceramsite

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