Potential of Natural and Recycled Concrete Aggregate Mixtures for Use in Pavement Structures

Đokić, Olivera; Radević, Aleksandar; Zakić, Dimitrije; Đokić, Božidar V.

doi:10.3390/min10090744

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…The materials used in these tests, as precursors, were metakaolin and powdered basalt. Ðokić et al [48] used the micro-Deval test to assess the abrasion resistance of the concrete aggregate (RCA) as a partial replacement of natural aggregate in road engineering in different flexible and rigid pavement layers and for various traffic loads. RCA was reached by crushing 30-year-old concrete slabs covered with a protective layer of asphalt.…”

Section: Rock Abrasiveness Test Methods Applicationmentioning

confidence: 99%

Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review

Mucha

2023

Sustainability

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The processes of rock formation have long been known and widely described in many literature items worldwide. Due to the multitude of occurring rock types, they are distinguished by various properties. For many decades, scientists worldwide have been determining various parameters by which these properties of rocks can be described. Tests of these parameters are commonly performed in many research centres worldwide. Depending on the scientific discipline, some researchers focus on geological properties (colour, structure, texture, chemical composition). Other researchers focus on physical and mechanical properties: hardness, density, strength properties, compactness, etc. Among them, abrasiveness and abrasivity can also be distinguished. In terms of nomenclature, they are very similar and often confused. Even within the academic community, researchers often use the names interchangeably, which needs to be corrected. This article aims to explain the difference between rock abrasiveness and rock abrasivity, classify methods for their assessment and present their practical applications in the mining and construction industry. It should be emphasized here that abrasiveness is determined when we are interested in the abrasive wear of natural stone and abrasivity when we are interested in the wear of the tool with which we cut the stone. The purpose of this article is also to let the reader decide whether to carry out an abrasiveness or abrasivity test and which method to use.

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Section: Rock Abrasiveness Test Methods Applicationmentioning

confidence: 99%

Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review

Mucha

2023

Sustainability

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“…The review indicated a growing interest in aggregates obtained from recycling processes. A significant number of publications suggest the possibility of replacing mineral aggregates with recycled aggregates and offer evaluations of the physical and strength-related parameters of such materials [ 1 , 23 , 24 , 25 , 26 , 27 , 28 ]. The results demonstrate that such materials may become an alternative construction material.…”

Section: Wear and Fragmentation Resistance Of Mineral Aggregates—a Review Of Micro-deval And Los Angeles Testsmentioning

confidence: 99%

“…Mineral aggregates are among the most important raw materials mined worldwide and also among the materials most frequently used in civil engineering [ 1 , 2 , 3 , 4 , 5 ]. Adomako et al [ 6 ] observe that crushed stones account for nearly 50% of aggregate production in Europe.…”

Section: Introductionmentioning

confidence: 99%

Wear and Fragmentation Resistance of Mineral Aggregates—A Review of Micro-Deval and Los Angeles Tests

Strzałkowski

Kaźmierczak

2021

Materials

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The aim of this article is to present the current knowledge and experiences related to wear and fragmentation resistance tests and to indicate those of their aspects that require further research. For this purpose, a review of the literature was performed. Results show that tests of resistance to wear (the MDE/DS test) and fragmentation (the LA test) are performed worldwide according to different standards (and thus following different test methods), which prevents a comparison of the obtained results. Comparative research into the MDE/DS and LA tests indicates that the MDE/DS test is more effective. The disadvantage of both tests lies in the dimension range of the aggregate. In addition, the use of steel balls in the LA test may not reflect the actual influence that the internal properties of the material have on the fragmentation process. A final review of the available knowledge allowed the formulation of proposals regarding further research directions, such as proposed changes of test methods, extensive analysis, and selection of optimal dimensions for tested aggregates, analysis of short-term and long-term tests, as well as extensive research into and an analysis of the impact of crushing on the physical, mechanical, and geometric properties of aggregates.

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“…Mineral aggregates are the basic raw material used in housing and road construction [ 1 , 2 , 3 , 4 , 5 , 6 ]. In addition to mineral aggregate, other materials can be used in construction as substitute components for the production of building materials [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

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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Potential of Natural and Recycled Concrete Aggregate Mixtures for Use in Pavement Structures

Cited by 10 publications

References 32 publications

Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review

Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review

Wear and Fragmentation Resistance of Mineral Aggregates—A Review of Micro-Deval and Los Angeles Tests

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

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