production of natural and recycled aggregates: the

specializing in the production of large, medium and small concrete mixers, concrete mixing stations, stabilized soil mixing stations and other equipment. It is a heavy industry enterprise integrating R & production and sales.

Production of natural and recycled aggregates: the ...

10%  Jun 22, 2017  Natural aggregates (NA) are crushed and processed in crushing plants after the extraction stage in quarries. In the present study, the aggregates are divided into three scenarios, depending on the production methods. The first scenario considers the production of NA, the second scenario deals with the production of recycled aggregates (RA) with respect to construction

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Production of natural and recycled aggregates: the ...

Request PDF Production of natural and recycled aggregates: the environmental impacts of energy consumption and CO2 emissions Natural aggregates (NA) are crushed and processed in crushing ...

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Aggregates from Natural and Recycled Sources

AGGREGATES FROM NATURAL AND RECYCLED SOURCES Economic Assessments for Construction Applications—A Materials Flow Study By David R. Wilburn and Thomas G. Goonan ABSTRACT Increased amounts of recycled materials are being used to supplement natural aggregates (derived from crushed stone, sand and gravel) in road construction. An understand-

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Comparative analysis on costs and benefits of producing ...

Dec 01, 2020  Nevertheless, the production costs for recycled concrete aggregates were lower than those for the corresponding natural aggregates. For instance, the long-term cost of producing one tonne of fine manufactured aggregate was 49 % higher than that for fine recycled concrete aggregate.

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Production of natural and recycled aggregates: the ...

Request PDF Production of natural and recycled aggregates: the environmental impacts of energy consumption and CO2 emissions Natural aggregates (NA) are crushed and processed in crushing ...

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Sustainable management and supply of natural and recycled ...

Several methods can improve the environmental sustainability of the whole aggregates' supply process, including natural and recycled aggregates' productive chains, for instance promoting the use of recycled aggregates (RA). However, when quarrying and recycling activities are considered as stand-alone processes, also the RA supply chain may not ...

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Recycled Aggregates - Portland Cement Association

The states that do use recycled concrete aggregate (RCA) in new concrete report that concrete with RCA performs equal to concrete with natural aggregates. Most agencies specify using the material directly in the project that is being reconstructed. Recycling of concrete is a relatively simple process.

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Life cycle assessment of natural and mixed recycled ...

May 10, 2017  The natural and mixed recycled aggregate production for use as road base and subbase have been compared through an attributional life cycle assessment. The primary data have been collected in a basalt natural aggregate production facility and in a recycling facility of mixed aggregate, both located in Southeast Brazil.

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Multicriteria optimization of natural and recycled ...

Jan 15, 2015  The data on cumulative energy demand and emissions for cement production were obtained from Lafarge Cement Plant, Beocin, while this data for the natural (Marinković et al., 2008) and recycled aggregate production (Marinković et al., 2013) were calculated based on the information about technology processes and used energy obtained from their ...

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Recycled Aggregate - an overview ScienceDirect Topics

Said Kenai, in Waste and Supplementary Cementitious Materials in Concrete, 2018. Abstract. Construction industry generates huge amounts of debris that needs to be recycled and reused as recycled aggregates (RAs) for partial or total substitution of natural aggregates. Recycling reduces waste and reduces energy consumption and hence contributes to a more sustainable construction

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A Study on the Properties of Recycled Aggregate Concrete ...

The recycled and natural aggregates have di erent specific gravities and are injected separately when producing concrete. If the mixer e ciency is low, this creates quality deviations in the concrete. Accordingly, to achieve a stable mixing of the recycled and natural aggregates, aggregate

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Structural Adequacy of Recycled Coarse Aggregates in ...

Both natural and recycled aggregates were from the same source. Concrete mixture of 1:1.5:3 by mass was used in this investigation. The 28-day compressive strength of concrete cubes of the recycled coarse aggregates and natural coarse aggregates were 21.30N/mm 2 and 24.66N/mm 2 respectively with a corresponding reduction in strength of 13.30% ...

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Natural Aggregate - an overview ScienceDirect Topics

Jan 02, 1992  Environmental impacts of recycled aggregates come from collection, sorting, reprocessing, and transportation of CD wastes. It is, however, important to consider whether production of recycled aggregates may consume more energy and have higher environmental impacts than the extraction of natural aggregates (Blengini and Garbarino, 2010). It is ...

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Use of Recycled Aggregates in Construction

natural aggregates can vary considerably. Aggregates from selected materials and industrial by-products, on the other hand, have greater potential for use in concrete and/or as road construction materials. A number of manufactured and recycled aggregates are readily available in certain localities.

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Environmental assessment of masonry mortars made with ...

Aug 14, 2018  Purpose This study used the life cycle assessment (LCA) methodology (ISO 14040, ISO 14044) to quantify and compare the environmental impacts associated with the production of masonry mortar manufactured with different amounts of natural fine aggregate (NFA), recycled fine aggregate (RFA) from construction and demolition waste (CDW), and admixture. The study also analyzed and

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(PDF) Recycled Concrete as Aggregate for Structural ...

A comparative analysis of the experimental results of the properties of fresh and hardened concrete with different replacement ratios of natural with recycled coarse aggregate is presented in the paper. Recycled aggregate was made by crushing the

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DIN EN 12620-2008 混凝土集料 标准下载

DIN EN 12620-2008, This European Standard specifies the properties of aggregates and filler aggregates obtained by processing natural, manufactured or recycled materials and mixtures of these aggregates for use in concrete. It covers aggregates having an oven dried particle density greater than 2,00 Mg/m3 (2 000 kg/ms) for all concrete, including concrete in conformity with EN 206-1 and ...

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Recycling Free Full-Text Sustainability Assessment of ...

The depletion of natural resources and global warming have increased in severity globally. In the industrial field, assembly products, such as electronic products, should be disassembled for recycling and reuse to deal with these problems. Reuse and recycling can contribute to reducing GreenHouse Gas (GHG) emissions and less depletion of natural resources since GHG emissions for virgin ...

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Aggregates from natural and recycled sources; economic ...

Increased amounts of recycled materials are being used to supplement natural aggregates (derived from crushed stone, sand and gravel) in road construction. An understanding of the economics and factors affecting the level of aggregates recycling is useful in estimating the potential for recycling and in assessing the total supply picture of aggregates.

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Sustainable management and supply of natural and recycled ...

Several methods can improve the environmental sustainability of the whole aggregates' supply process, including natural and recycled aggregates' productive chains, for instance promoting the use of recycled aggregates (RA). However, when quarrying and recycling activities are considered as stand-alone processes, also the RA supply chain may not ...

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(PDF) STUDY OF NATURAL AGGREGATES AND TESTING OF RECYCLED ...

Use of recycled aggregate in a new concrete production is still limited. Recommendation of introduction of recycled aggregates standard is required for the materials to be used successfully in future.

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Using Recycled Aggregates for Concrete Production

Sep 15, 2020  In its appraisal, concrete produced from recycled sand and aggregates is unfairly pitted against higher-strength concrete produced using virgin aggregate, such as granite or basalt, and natural sand. It is fair to say that not all granite or sandstone deposits display the same strength characteristics and therefore selective end-use logic is ...

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(PDF) Recycled aggregates in concrete production ...

The use of recycled concrete aggregates saves only about 1% CO2 emission compared to regular concrete while fly ash saves more than 28.5% and wood ash saves almost 24.5%. They can replace natural

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Economic and Environmental Evaluation and Optimal

ResearchArticle Economic and Environmental Evaluation and Optimal Ratio of Natural and Recycled Aggregate Production MiladGhanbari,1 ArminMonirAbbasi,2 ...

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Environmental life cycle assessment of coarse natural and ...

The environmental impacts of natural aggregates (NA) and recycled concrete aggregates (RCA) production for use in road pavements have been evaluated in this study through an attributional life ...

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Life Cycle Assessment of Natural and Recycled Concrete ...

The environmental impacts of natural aggregates (NA) and recycled concrete aggregates (RCA) production for use in road pavements have been evaluated in this study through an attributional life cycle assessment (LCA) from cradle to gate.

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The Importance of Using Sustainable Aggregates 2016-07 ...

Jul 06, 2016  Using recycled aggregates for concrete production will not only help to conserve natural aggregate resources and limit greenhouse gas production, but will

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(PDF) Recycled Concrete as Aggregate for Structural ...

A comparative analysis of the experimental results of the properties of fresh and hardened concrete with different replacement ratios of natural with recycled coarse aggregate is presented in the paper. Recycled aggregate was made by crushing the

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Environmental assessment of masonry mortars made with ...

Aug 14, 2018  Purpose This study used the life cycle assessment (LCA) methodology (ISO 14040, ISO 14044) to quantify and compare the environmental impacts associated with the production of masonry mortar manufactured with different amounts of natural fine aggregate (NFA), recycled fine aggregate (RFA) from construction and demolition waste (CDW), and admixture. The study also analyzed and

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Recycled Concrete as Aggregate for Structural Concrete ...

Properties of natural and recycled concrete aggregate were tested according to Serbian standards for natural aggregates and quality requirements given in Tables 1 and 2 are also according to Serbian standard for natural aggregates: SRPS B.B2.010:1986 [22]. As it can be seen from Table 2, recycled

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Suitability Investigation of Recycled Concrete Aggregates ...

Sep 30, 2018  M. Wijayasundara, P. Mendis, and R. H. Crawford, “Methodology for the integrated assessment on the use of recycled concrete aggregate replacing natural aggregate in structural concrete,” Journal of Cleaner Production, vol. 166, pp. 321–334, 2017.

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Construction aggregate - Wikipedia

Construction aggregate, or simply aggregate, is a broad category of coarse- to medium-grained particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates.Aggregates are the most mined materials in the world. Aggregates are a component of composite materials such as concrete and asphalt; the aggregate serves as ...

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