Evaluation of the mechanical degradation of carbonate aggregate by rock strength tests

Kamani, Mojtaba; Ajalloeian, Rassoul

doi:10.1016/j.jrmge.2018.05.007

Cited by 27 publications

(12 citation statements)

References 35 publications

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“…For fraction < 2 mm, the natural gravel, thick natural gravel, and sand were verified. Another example is Reference [56], where the assessment of the possibility of predicting the degradation of Iranian carbonate aggregates was carried out. The strength tests of rocks and the dependencies between the properties of aggregate were realized.…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of Natural Aggregate Crushing Process on Crushing Strength Index

et al. 2021

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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.

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Section: Literature Reviewmentioning

confidence: 99%

Influence of Natural Aggregate Crushing Process on Crushing Strength Index

et al. 2021

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“…The suitable properties for aggregate production were checked as regard as water contented, density, whether resistance and abrasion resistance finally carried out the limestone site which more suitable for concrete and asphalt making. Kamani & Ajalloeian (2019) target to investigating the aggregate degradation (AD) by using rock strength tests to check the relationship between ad properties and rock strength. the final results carried out that good correlation between point load index and aggregate impact value (R 2 = 0.832), also, UCS has relative larger effects on the aggregate crushing value (ACV) (R 2 = 0.812) under the same loading condition.…”

Section: Experimental Workmentioning

confidence: 99%

Engineering characteristics of Egyptian limestone

Ali¹,

Ahmed²

2019

Min. miner. depos.

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Purpose. Study of physical properties such as porosity, density and mechanical properties such as compressive strength and tensile strength of Egyptian limestone based on experimental investigations. Methods. In this paper using physical and mechanical properties to evaluate the Egyptian limestone according to the relationship between their properties especially the degree of water saturation. Samples were obtained from six different locations (Helwan, Minia, Assuit, Qena, Sohag, and Aswan).Findings. The strong correlation between porosity and density, and good correlations between uniaxial strength and tensile strength. Carried out results indicated that, small porosity results in greater rock strength and vice versa.Originality. Applying the fitting curve technique to check the best correlation between the different property of limestone to identify the best relationship to apply the prediction to find the limestone property in other location as regards applying conditions. Practical implications.Results carried out that the strong correlation between porosity and density, and good correlations between uniaxial strength and tensile strength as summarize in the outcome of data interpretation. Highest quality stones, in terms of their hydric behavior and mechanical properties, are the index for the suitability of using limestone.

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“…Due to the high demand for concrete, a significant volume of natural resources is required 1 , and modern construction entails concrete as a fundamental element which is a blend of fine to coarse aggregates, water, and cement that can be molded before setting up into a tight and solid mass 2 . Many civil engineering projects use aggregates as reinforcement, as well as to decrease shrinkage and to provide economic benefit 3 .…”

Section: Introductionmentioning

confidence: 99%

Exploring the potential of late permian aggregate resources for utilization in engineering structures through geotechnical, geochemical and petrographic analyses

Hussain

Zhang

Iqbal

et al. 2023

Sci Rep

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The China-Pakistan Economic Corridor (CPEC) is an ongoing mega-construction project in Pakistan that necessitates further exploration of new natural resources of aggregate to facilitate the extensive construction. Therefore, the Late Permian strata of Chhidru and Wargal Limestone for aggregates resources were envisaged to evaluate their optimal way of construction usage through detailed geotechnical, geochemical, and petrographic analyses. Geotechnical analysis was performed under BS and ASTM standards with the help of employing different laboratory tests. A simple regression analysis was employed to ascertain mutual correlations between physical parameters. Based on the petrographic analysis, the Wargal Limestone is classified into mudstones and wackestone, and Chhidru Formation is categorized into wackestone and floatstone microfacies, both containing primary constituents of calcite and bioclasts. The geochemical analysis revealed that the Wargal Limestone and Chhidru Formation encompass calcium oxide (CaO) as the dominant mineral content. These analyses also depicted that the Wargal Limestone aggregates bear no vulnerability to alkali-aggregate reactions (AAR), whereas the Chhidru Formation tends to be susceptible to AAR and deleterious. Moreover, the coefficient of determination and strength characteristics, for instance, unconfined compressive strength and point load test were found inversely associated with bioclast concentrations and directly linked to calcite contents. Based on the geotechnical, petrographic, and geochemical analyses, the Wargal Limestone proved to be a significant potential source for both small and large-scale construction projects, such as CPEC, but the Chhidru Formation aggregates should be used with extra caution due to high silica content.

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Evaluation of the mechanical degradation of carbonate aggregate by rock strength tests

Cited by 27 publications

References 35 publications

Influence of Natural Aggregate Crushing Process on Crushing Strength Index

Influence of Natural Aggregate Crushing Process on Crushing Strength Index

Engineering characteristics of Egyptian limestone

Exploring the potential of late permian aggregate resources for utilization in engineering structures through geotechnical, geochemical and petrographic analyses

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