recycled aggregate concrete journals

Recycling of Concrete (Recycling Coarse Aggregate) – IJERT

Recycling of concrete is a simple process. It involves breaking, removing, and crushing existing concrete into a material with a specified size and quality. As per study about 75 to 80% of total construction material consist coarse aggregate portion. When

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Use of recycled concrete aggregate in concrete: a review: Journal

2013/9/6 · The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for virgin aggregate. In addition, the use of RCA l

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Recycled Concrete—A Source for New Aggregate - ASTM

Results show that for a W/C ratio of 0.35 the recycled aggregate concrete has 30% lower strength than conventional concrete. The strength differential narrowed for increasing values of W/C ratio until the strengths were about equal for a W/C ratio of 0.55

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Research Paper A TECHNO-ECONOMICAL STUDY ON RECYCLED

recycled concrete families were created by replacing parts of the natural aggregates forming families of concrete with 0%, 20%, 40%, 60%, 80% and 100% of aggregates from recycled sources. Recycled aggregates are comprised of crushed, graded

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Effects of the fine recycled concrete aggregates on the

In this experimental study, the effects of the recycled fine recycled concrete aggregate (FRA) that was manufactured from concrete wastes on the concrete properties were investigated. In concrete mixtures, 0, 10, 20, 30, 40, 50 and 100% by weight FRA were

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Recycled Concrete Aggregates: A Review | SpringerLink

Mar 29, 2013 · 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 separ

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New Trends in Recycled Aggregate Concrete | MDPI Books

2019/11/4 · (This book is a printed edition of the Special Issue New Trends in Recycled Aggregate Concrete that was published in Applied Sciences

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Influence of Recycled Concrete Aggregates on Strength

100 % recycled aggregate concrete was 18.10 N/mm2.This shows as we increase the percentage of recycled aggregate in the concrete mix , the compressive strength decreases. However, there is not so much difference between the compressive strength of normal

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PREDICTING MODULUS OF ELASTICITY OF RECYCLED AGGREGATE

recycled concrete aggregate. In the present study the authors provide several nonlinear models, which are able to predict the modulus of elasticity behaviour of the concrete manufactured with recycled aggregate. A database was composed of 147 different mi

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Recycled Aggregate Concrete: Applications, Advantages

One such material is recycled aggregate concrete. Fig. 1 Concrete debris. Manufacturing of Recycled Aggregate. Recycled aggregate concrete (RAC) is produced in three major steps: Evaluation of Source concrete: The first step in production of RAC is to det

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Handbook of Recycled Concrete and Demolition Waste - 1st

Handbook of recycled concrete and demolition waste is a standard reference for all those involved in the civil engineering sector, as well as academic researchers in the field. Key Features Summarises key recent research in recycling and reusing concrete

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Use of Recycled Aggregate Concrete - Semantic Scholar

aggregate), and old hardened concrete can be recycled and used as aggregate in new concrete or as fill and pavement base material. 2. Economic factors. Recycling concrete is an attractive option for governmental agencies and contractors alike. Most munici

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International Journal of Engineering Trends and Technology

Concrete made with recycled aggregate produced from construction and demolition waste has a compressive strength (28days) about 27% - 30% less than the strength of the concrete made with natural aggregates.

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Effect of Recycled Coarse Aggregate on Concrete Properties

Moreover, the discussion about recycled aggregate usually correlate with recycled coarse aggregate. Coarse recycled concrete aggregate (RCA) is produced by crushing the demolition waste of at least 95% by weight of concrete, and having a total contaminant

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Construction Industry Waste Management - UGC Approved Journal

In this research work, a comparison between natural aggregate (NA) and recycled aggregate (RA) has been done and various proportions of NA: RA (0:100, 60:40, 70:30, 80:20 and 100:0) have been experimentally tested for efficacy of use in two concrete mixes

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Environmental Assessment of Two Use Cycles of Recycled

The main goal of this study was to compare two use cycles of natural aggregate concrete and recycled aggregate concrete, which is another way to compare the environmental impacts of recycled materials. A series of concrete mixtures with various replacemen

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PROPERTIES OF RECYCLED AGGREGATE CONCRETE

Mirjana Malešev, et al., Properties of recycled aggregate concrete Contemporary Materials, V −2 (2014) Page 241 of 249 aggregate is usually left out, in a way that it is completely replaced by the river sand [4,5]. Figure 3

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Strengths of Recycled Aggregate Concrete Made Using Field

Two sources of recycled aggregate (crushed concrete pavements from U.S. 23 and 1-75 projects in Michigan) and one source of natural aggregate (crushed limestone) were used. Two maximum sizes of aggregates, two levels of water-cement ratio, and two levels

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(PDF) Use of recycled concrete aggregate in concrete: A review

The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for...

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Special Issue "New Trends in Recycled Aggregate Concrete"

The environmental impact of recycled aggregate (wet) was up to 16~40% higher compared with recycled aggregate (dry); the amount of energy used by impact crushers while producing wet recycled aggregate was the main cause for this result.

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Sabinet | Use of recycled concrete aggregates in

In the face of a possible scarcity of natural aggregates in the future in Mauritius and in line with sustainable construction, this research investigates the feasibility of the use of recycled coarse concrete aggregate of 5-20 mm fraction as an alternativ

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Recycled Aggregate - an overview | ScienceDirect Topics

Recycled aggregate occurs as either recycled concrete aggregate (RCA) or recycled asphalt pavement (RAP). Recycling concrete and asphalt has been taking place in the USA since at least the early 1970s ( Nanasy 1972 ), and by the 1990s was a well-establish

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Review Article ASSESSMENT OF RECYCLED AGGREGATE CONCRETE

Tests on air – entrained recycled aggregate concrete used at up to 100% by mass of coarse aggregate have been shown to give good freeze – thaw scaling resistance (56 day scaling , 0.5kg/m2) and to perform similarly to air – entrained natural aggregate con

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Recycled Topic - American Concrete Institute

Home > Topics in Concrete > topicdetail. 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 save energy and natural resources. Concrete debris is typ

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Journals On Recycled Aggregate Concrete

Concrete recycling Wikipedia. When structures made of concrete are demolished or renovated, concrete recycling is an ... Crushed recycled concrete can also be used as the dry aggregate for brand new ....

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Recycled Aggregates - cement.org

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. Recycl

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Seismic Performance of Interior and Exterior Beam–Column

Mar 03, 2019 · However, only a few experimental tests have been conducted on recycled aggregate concrete (RAC) beam–column joints. This paper presents an experimental investigation of the seismic behavior of various types of RAC beam–column joints.

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Use of Recycled Aggregates in Construction

Recycled Aggregates Recycled Concrete Aggregate (RCA) Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass. Class 1A RCA is a well graded RCA with no more than 0.5% br

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Strength and Durability Evaluation of Recycled Aggregate

2015/5/14 · Utilizing recycled aggregate is certainly an important step towards sustainable development in the concrete industry and management of construction waste. Recycled aggregate (RA) is a viable alternative to natural aggregate, which helps in the

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Seismic Testing and Numerical Analysis of - concrete.org

An extensive study on natural aggregate concrete (NAC) beam-column joints has been conducted. However, few studies have examined the seismic performance of beam-column joints made with recycled aggregate concrete (RAC), especially for RAC roof-level exter

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Strength Characteristics of Geopolymer Concrete Containing

components of old concrete and for many reasons there is a need to re-use them. It is better to the reuse of waste aggregates as recycled aggregates in structural concrete, instead of throwing out as a total waste material. Thus in recent years, the use o

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Fly Ash and Recycled Coarse Aggregate in Concrete: New Era

Fly Ash and Recycled Coarse Aggregate in Concrete: New Era for Construction Industries - A Literature Review Prof. Chetna M.Vyas1, Prof. Jayeshkumar Pitroda2 1Assistant Professor and Research Scholar, Civil Engineering Department, A.D. Patel Institute of

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Recycled Aggregates in Concrete • Aggregate Research

The states that do use recycled concrete aggregate in new concrete report that concrete with recycled concrete aggregate performs equal to concrete with natural aggregates. Most agencies specify using the material directly in the project that is being rec

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Buildings | Free Full-Text | Evaluation of Concrete Strength Made

2019/1/28 · As a result, the colossal quantity of concrete rubble is disposed in landfills. This paper, therefore, evaluated the feasibility of reusing waste concrete as recycled aggregate (RA) to produce concrete. The replacement levels were 20, 50, and

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The potency of recycled aggregate in new concrete: A review

Purpose: This paper aims to review the effect of using recycled aggregates (RA) on the properties of recycled aggregate concrete (RAC) following the steady rise in global demand for concrete and the large generation of construction and demolition waste.

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