recycled concrete as aggregate for structural
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Recycled Concrete as Aggregate for Structural Concrete ...

Feb 16, 2011  Recycled aggregate was made by crushing the waste concrete of laboratory test cubes and precast concrete columns. Three types of concrete mixtures were tested: concrete made entirely with natural aggregate (NAC) as a control concrete and two types of concrete made with natural fine and recycled coarse aggregate (50% and 100% replacement of ...

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Recycling Aggregates for Self-Compacting Concrete ...

Using recycled aggregates is a relatively recent scientific area, however, studies on this material in the manufacture of self-compacting concrete have proven the feasibility thereof for conventional structural elements as well as high-performance and complex structural elements, densely reinforced structures, difficult-to-access formwork and ...

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

Apr 30, 2010  Recycled Concrete as Aggregate for Structural Concrete Production.pdf. Content uploaded by Vlastimir Radonjanin. Author content. All content in this area was uploaded by Vlastimir Radonjanin on ...

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Recycled Concrete Aggregate (RCA) for Infrastructure ...

recycled concrete aggregate (RCA) in concrete used for structural purposes. Using RCA in concrete has been shown in recent studies to be able to produce adequately strong concrete with an inherent property of high paste content. Although high paste contents can lead to creep and durability problems, in many applications such as sidewalks and

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(PDF) Use of recycled concrete aggregates in structural ...

Recycled concrete aggregate (RCA) collected from the demolition of old reinforced concrete structures can be reused to prepare structural and non-structural concrete, thereby protecting the ...

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Use of recycled coarse and fine aggregates in structural ...

May 24, 2021  Recycled concrete and mixed aggregates are apt for structural concrete. • Recycled aggregates have no effect on concrete workability. • All the aggregates studied can be used to manufacture 30 MPa concretes. • EHE-08 models for predicting tensile and flexural strength should be corrected. • The use of recycled aggregates lowers CO 2 ...

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High-Strength Structural Concrete with Recycled Aggregates

on the properties of concrete with recycled aggregates, as an alternative material to coarse aggregate in structural concrete. The scope of this project is to determine and compare the high strength concrete by using different percentage of recycled aggregates.

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Engineering properties of treated recycled concrete ...

Jul 01, 2013  One method to promote and encourage maximum recycled concrete aggregate (RCA) utilisation for structural concrete applications is to minimise the adverse effects of RCA on concrete performance. The formulation of an appropriate recycling process in

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Alternative processing procedures for recycled aggregates ...

Oct 30, 2014  As a matter of fact, recycled concrete aggregates are mainly composed of two phases , , namely old aggregates and old mortar paste. Consequently, the standard procedure generally adopted for the design and production of ordinary concrete (i.e., with natural aggregates), cannot be applied when Recycled Aggregates Concrete is used.

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Recycled aggregate concrete as structural material ...

Jul 13, 2006  The use of recycled aggregates in concrete opens a whole new range of possibilities in the reuse of materials in the building industry. The utilisation of recycled aggregates is a good solution to the problem of an excess of waste material, provided that the desired final product quality is reached. The studies on the use of recycled aggregates have been going on for 50 years. In fact, none of ...

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

Apr 30, 2010  Recycled concrete aggregate fractions. From left to right; 4-8 mm, 8-16 mm and 16-31.5 mm coarse aggregates.

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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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Effect of recycled concrete aggregates on strength and ...

concrete is made with RCA as a replacement for natural coarse aggregates. Importantly, the water absorption and deleterious material content of RCA can be measured and used to prequalify the material for use in structural concrete. In the precast concrete industry, recycling of discarded or rejected precast concrete products as RCA in new precast

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Recycled Concrete Aggregate for Medium-Quality Structural ...

This paper reports an evaluation of the properties of medium-quality concrete incorporating recycled coarse aggregate (RCA). Concrete specimens were prepared with various percentages of the RCA (25%, 50%, 75%, and 100%). The workability, mechanical properties, and durability in terms of abrasion of cured concrete were examined at different ages.

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High-Strength Structural Concrete with Recycled Aggregates

on the properties of concrete with recycled aggregates, as an alternative material to coarse aggregate in structural concrete. The scope of this project is to determine and compare the high strength concrete by using different percentage of recycled aggregates.

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Recycled Concrete Aggregates: A Review International ...

Mar 29, 2013  After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1).This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that is created after the mortar is separated from the rock which ...

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Experimental Study on Recycled Concrete Aggregates

natural aggregates with recycled concrete aggregate ranges from 11% to 33%. RCA can replace NA in the production of both non-structural and structural concrete. •Garg and Jain (2014), studied on green concrete: efficient eco-friendly construction materials. It presents

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A review of experimental results on structural performance ...

Jun 30, 2020  The structural performances are reviewed focusing on the main geometric and material variables such as the recycled concrete aggregate replacement ratio, the longitudinal reinforcement ratio, the transverse reinforcement ratio, and the shear span-to-depth ratio.

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Vol. 2, Issue 3, March 2013 Recycled Plastics as Coarse ...

Recycled Plastics as Coarse Aggregate for Structural Concrete Praveen Mathew1, Shibi Varghese2, Thomas Paul3, Eldho Varghese4 Assistant Professor, Department of Civil Engineering, M. A. college of Engineering, Kothamangalam, Kerala, India1

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Use of RECYCLED AGGREGATES In CONCRETE- A Paradigm Shift

The fine aggregate used in the concrete, i.e. recycled and conventional is 100 percent natural. The recycled aggregate are collected from four sources all demolished structures. For both types of concrete i.e. M-20 and M-25, w/c ratio, maximum size of aggregate and mix proportion are kept constant.

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Efficient Utilization of Recycled Concrete Aggregate in ...

Mar 03, 2013  In Singapore, the applications of recycled concrete aggregate (RCA) are limited to nonstructural concrete, road construction, and backfilling. To realize the beneficial use of RCA, an in-depth study was conducted to evaluate its use in structural concrete.

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Recycled Aggregate Concrete Structures SpringerLink

Recycled Aggregate Concrete Structures. Authors. (view affiliations) Jianzhuang Xiao. The world’s first book on recycled aggregate concrete (RAC) structures. Based on the author’s ten years of fundamental studies on the material properties and structural behavior of RAC. Includes first

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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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A recycled aggregate concrete high-rise building ...

The results indicate that adoption of recycled aggregate concrete as structural material in the high-rise structure, in place of natural aggregate concrete, can result in up to about 2.175 × 10⁵ kgCₑ decrease in carbon footprint in condition of this specific project.

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Recycled Aggregate Concrete Structures SpringerLink

Recycled Aggregate Concrete Structures. Authors. (view affiliations) Jianzhuang Xiao. The world’s first book on recycled aggregate concrete (RAC) structures. Based on the author’s ten years of fundamental studies on the material properties and structural behavior of RAC. Includes first

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Recycled Concrete Aggregates – Its Uses, Properties ...

Aug 18, 2020  History. Recycled concrete aggregates or Crushed concrete aggregates has been in use since the ancient times, only to be integrated with gravel, sand, and cement to ensure durability. The practice was first recorded in the 1860s. US construction companies were reluctant to use the technique at first since crushing cured concrete proved to be much more cost-intensive in terms of labor.

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Microstructural Features of Recycled Aggregate Concrete ...

Microstructural Features of Recycled Aggregate Concrete: From Non-Structural to High-Performance Concrete - Volume 25 Issue 3 ... RAC, equivalent mixes produced with recycled concrete aggregates, where RAC-100C designates concrete with 100% replacement of coarse NA by coarse RCA and RAC-100FC designates concrete where both coarse and fine NA ...

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Use of RECYCLED AGGREGATES In CONCRETE- A Paradigm Shift

The fine aggregate used in the concrete, i.e. recycled and conventional is 100 percent natural. The recycled aggregate are collected from four sources all demolished structures. For both types of concrete i.e. M-20 and M-25, w/c ratio, maximum size of aggregate and mix proportion are kept constant.

Get Price

Experimental Study on Recycled Concrete Aggregates

natural aggregates with recycled concrete aggregate ranges from 11% to 33%. RCA can replace NA in the production of both non-structural and structural concrete. •Garg and Jain (2014), studied on green concrete: efficient eco-friendly construction materials. It presents

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A STUDY ON RECYCLED CONCRETE AGGREGATES

A STUDY ON RECYCLED CONCRETE AGGREGATES PAVAN P S 1, BABITHA RANI H ,DEEPIKA GIRISH , RAGHAVENDRA K M 2, VINOD P N 1,DUSHYANTH.V.BABU.R ,SHAIK NUMAN1 1Assistant Professor, Department of Civil Engineering, SET, Jain University. 2Student , Department of Civil Engineering, SET, Jain University. Abstract The amount of construction waste has been dramatically increased in the last decade, and

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Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015  The state of the art regarding the long-term properties of recycled aggregate concrete. Structural Concrete, 15(1), 3–12. Article Google Scholar Xiao, J. Z., Li, J. B., Zhang, C. (2006). On relationships between the mechanical properties of recycled aggregate concrete: An overview. Materials and Structures, 39(6), 655–664.

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RECYCLED CONCRETE AGGREGATE (NYSDOT Specs) - Structural ...

Nov 27, 2007  RECYCLED CONCRETE AGGREGATE (NYSDOT Specs) PT999 (Structural) (OP) 26 Nov 07 16:46. I want to use recycled concrete aggregrate as a base under under hot mix asphalt for a small road project I am using NYSDOT Standard Specifications (2006 ed) for all the items.

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Performance of Pervious Concrete with Recycled Concrete ...

Aug 19, 2020  Methodology. Recycled concrete aggregates are generally more porous than the primary coarse aggregates. The main property of pervious concrete is its permeability, so the part of fine aggregate can be reduced and the part of natural aggregate can be replaced with recycled concrete aggregate to enhance permeability without much affecting the strength of the concrete.

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recycled concrete Topic

Jul 01, 2021  Recycled Concrete. Definition: hardened concrete that has been processed for reuse, usually as aggregate.- ACI Concrete Terminology. The reason for recycling is the reduction of waste in order to protect nature against pollution, the increasing shortage of suitable dumping grounds, and to

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Efficient Utilization of Recycled Concrete Aggregate in ...

Mar 03, 2013  In Singapore, the applications of recycled concrete aggregate (RCA) are limited to nonstructural concrete, road construction, and backfilling. To realize the beneficial use of RCA, an in-depth study was conducted to evaluate its use in structural concrete.

Get Price

Structural Behavior of Concrete Beams Containing Recycled ...

Jul 04, 2020  The structural behavior of concrete beams containing recycled coarse aggregates (RCAs) was investigated in this study using detailed experimental data. Twelve concrete beams were tested in the experimental program: nine beams with varying RCA contents and three control beams with natural coarse aggregates (NCAs). The parameters for investigating the structural behavior of the RCA concrete ...

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Recycled Concrete Aggregate Research Papers - Academia

This paper is the outcome of experiments on the shear performance of reinforced concrete beams with approved composite-recycled aggregates. The strength grade of composite-recycled aggregate concrete (CRAC) was between 30 MPa and 60 MPa. The shear span-to-depth ratio varied from 1 to 3.

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