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(PDF) Concrete using recycled aggregates - ResearchGate

2017-9-1  The recycled aggregates obtained from waste concrete are more angular and have higher absorption and specific gravity than natural coarse aggregates and it

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(PDF) Recycled aggregates in concrete production:

2022-1-19  Recycled aggregates and particularly, recycled concrete aggregate substantially affect the properties and mix design of concrete both at fresh and hardened states since it is known by high porosity...

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(PDF) Recycled aggregates in concrete production:

2017-1-1  The present paper discusses the various possible recycled aggregates used in concrete production, their effect on both fresh and hardened properties as well as durability performances. The ...

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Recycled Concrete as Aggregate for Structural Concrete

2010-4-30  Waste concrete for recycling: concrete cubes and precast column. Figure 2. Recycled material after (a) primary and (b) secondary crushing. b. a. Crushed concrete particles were separa ted into ...

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Recycling Aggregates for Self-Compacting Concrete

2020-2-14  This paper presents an original study on the use of coarse recycled concrete aggregate (CRA) to obtain self-compacting concrete. Concrete with substitution ratios of 20%, 50% and 100% are compared with a control concrete. The purpose of this comparison is to check the influence of CRA on fresh SCC as well as its physical and mechanical properties.

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Production of Recycled Aggregate Concrete Using

2021-7-14  The recycled aggregates were treated in a concrete mixer truck to partially remove the adhered cement paste in order to compare their performance in concrete as opposed to natural aggregates and non-treated recycled aggregates. One high-strength concrete series of mixtures was prepared to employ the concept of internal curing.

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Properties of recycled concrete aggregate and their

2018-6-1  Using recycled aggregate (RA) may help to address some of these challenges ( ACPA, 2009; Verian, 2012 ). RA can be derived from existing concrete, and thus, termed as recycled concrete aggregate (RCA). According to de Vries (1996), the application of RCA in construction works has become a subject of priority throughout many places around the world.

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Using Recycled Concrete as a Replacement for Coarse

2020-12-4  For the coarse aggregate replacement, the concrete compressive strength reduced by using the replacement values 50% and 75% by 33.3% and 55.8% respectively corresponding to compressive strength values of 18.4 MPa and 12.2 MPa, which is also below the target strength values of grade 20 concrete.

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Recycled Aggregates Production Through Economic

2022-5-16  It is found that the investment in recycled aggregate plants takes nine years of payback period. Besides, the sensitivity analysis suggests that implementing certain strategies, such as imposing a...

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(PDF) Concrete using recycled aggregates

2017-9-1  The recycled aggregates obtained from waste concrete are more angular and have higher absorption and specific gravity than natural coarse aggregates and it resulted in increased strength and...

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Use Of Recycled Aggregate In Concrete – IJERT

2013-1-30  The use of recycled aggregate generally increases the drying shrinkage creep porosity to water decreases the compression strength of concrete compared to that of natural aggregate concrete. It is nearly 10-30% as per replacement of aggregate.

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Recycled Concrete as Aggregate for Structural

2010-4-30  Waste concrete for recycling: concrete cubes and precast column. Figure 2. Recycled material after (a) primary and (b) secondary crushing. b. a. Crushed concrete particles were separa ted into ...

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Using Recycled Concrete Aggregates in New Zealand

Although current New Zealand practices include some use of crushed concrete in road construction, use of recycled concrete aggregate (RCA) in low specification concrete is currently infrequent and the use of recycled concrete as an aggregate source in structural concrete applications is rare.

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Using Recycled Concrete Aggregates in New Zealand

To make such recycling feasible, the properties of RCA must be related to the properties of new concrete that utilizes the recycled aggregates. In response to this need, a study was undertaken to investigate the feasibility of using RCA as a viable alternative to natural aggregate (NA) in the production of concrete manufactured in a ...

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Recycled Aggregate for Structural Concrete

2008-8-25  Much of the U.S. research focused on using crushed, hardened concrete as an aggregate in fresh concrete has been in mainline paving. Work on this topic began with a major effort in the 1980s in Minnesota. Unfortunately, most of the research focused on using recycled concrete aggregate (RCA) as a base material to the pavement.

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Suitability Investigation of Recycled Concrete

2018-9-30  The specific objectives of this work are twofold: (i) to investigate the suitability of RCA for new concrete production by characterizing their physical and mechanical properties and (ii) to evaluate the performance of concrete

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【国外标准】 Recycled concrete using recycled aggregate ...

2006-3-25  Recycled concrete using recycled aggregate Class L (Amendment 1) 标准状态: 被代替 发布日期: 2006-03-25 实施日期: 出版语种: 标准分类号 标准ICS号: 91.100.30 中标分类号: 关联标准 替代以下标准 ...

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Recycling Aggregates for Self-Compacting Concrete

2020-4-22  This is complicated when using recycled aggregates for substitution purposes considering their great heterogeneity [32]. Some authors and studies recommend the use of Portland cement Type II (with a clinker content between 65% and 94%) for use in concrete with recycled aggregates to prevent the generation of alkali-aggregate reactions [33].

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Recycled Aggregates Production Through Economic

2022-5-16  It is found that the investment in recycled aggregate plants takes nine years of payback period. Besides, the sensitivity analysis suggests that implementing certain strategies, such as imposing a...

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Use of RECYCLED AGGREGATES In CONCRETE-

2022-7-18  The utilization of recycled aggregate is particularly very promising as 75 per cent of concrete is made of aggregates. In that case, the aggregates considered are slag, power plant wastes, recycled concrete, mining and

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(PDF) AN INTRODUCTION TO RECYCLED AGGREGATE

2015-11-1  Abstract. To obtain good quality concrete using recycled aggregate it is necessary to follow the minimum requirements defined by the respective Building

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Using Recycled Concrete as Aggregate - Civil Engineering

2020-8-13  To use recycled concrete as aggregate for concrete contaminants like reinforcing, steel foundation, materials soil etc are removed from the concrete debris. It can be done by screening, air-separation, demolition using electromagnets. Then the debris is crushed either manually or mechanically. It in done in specified size and quality usually ...

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Recycled Concrete Aggregates: A Review International

2013-3-29  Since the recycled aggregate has different properties than NA, it behaves differently in concrete mixes and causes the finished concrete to perform unlike conventional concrete. This section describes the variation between the properties of RCA concrete compared to conventional NA concrete. Compressive Strength

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Recycled Aggregate for Structural Concrete

2008-8-25  Unfortunately, most of the research focused on using recycled concrete aggregate (RCA) as a base material to the pavement. But in other parts of the world, many recognize RCA as a valuable aggregate source when properly intregated into the mix design process. For example, Japan has used RCA for more than 20 years in structural concrete ...

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(PDF) Concrete with fine recycled aggregates: A

2014-2-7  In this paper, 371 cube specimens of recycled aggregate concrete with 0,30%, 50% and 100% recycled coarse aggregate replacement percentages were fabricated and tested under laboratory conditions.

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Recycling Aggregates for Self-Compacting

2020-2-14  This paper presents an original study on the use of coarse recycled concrete aggregate (CRA) to obtain self-compacting concrete. Concrete with substitution ratios of 20%, 50% and 100% are compared with a control

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【国外标准】 Recycled concrete using recycled aggregate ...

2006-3-25  Recycled concrete using recycled aggregate Class L (Amendment 1) 标准状态: 被代替 发布日期: 2006-03-25 实施日期: 出版语种: 标准分类号 标准ICS号: 91.100.30 中标分类号: 关联标准 替代以下标准 ...

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Recycling Aggregates for Self-Compacting Concrete

2020-4-22  This is complicated when using recycled aggregates for substitution purposes considering their great heterogeneity [32]. Some authors and studies recommend the use of Portland cement Type II (with a clinker content between 65% and 94%) for use in concrete with recycled aggregates to prevent the generation of alkali-aggregate reactions [33].

Inquire now

Recycled Aggregates Production Through Economic

2022-5-16  It is found that the investment in recycled aggregate plants takes nine years of payback period. Besides, the sensitivity analysis suggests that implementing certain strategies, such as imposing a...

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