Recycled Concrete Aggregates: A Review | SpringerLink

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 …

Effects of Recycled Aggregate on Concrete Mix and Exposure ...

The unit weight of the concrete ranged from 2365 to 2175 kg/m 3, depending on aggregate content (Figure 6).Increasing the recycled aggregate content reduces the unit weight and density of the concrete, resulting in lighter concrete (Figure 6).The unit weights of the 15%, 20%, and 25% mixes were reduced by 8%, 11%, and 11.5%, respectively, compared to plain concrete.

Altun | Improving the impact resistance of recycled ...

Journal Help Research Articles | Challenge Journal of Structural Mechanics Improving the impact resistance of recycled aggregate concretes with different types of fibers

Microstructure of Concrete with Aggregates from ...

This paper intends to analyze the microstructure of concrete with recycled aggregates (RA) from construction and demolition waste from various Portuguese recycling plants. To that effect, several scanning electron microscopy (SEM) and energy-dispersive X …

recycled concrete Topic

May 01, 2020· 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 save energy and natural resources.

Recycled Concrete as Aggregate for Structural Concrete ...

Recycled concrete aggregate (RCA) is generally produced by two-stage crushing of demolished concrete, and screening and removal of contaminants such as reinforcement, paper, wood, plastics and gypsum. Concrete made with such recycled concrete aggregate is called recycled aggregate concrete (RAC). The main purpose of this work is to determine

Mix Design for Pervious Recycled Aggregate Concrete ...

Nov 27, 2012· Pervious concrete is a tailored-property concrete with high water permeability which allow the passage of water to flow through easily through the existing interconnected large pore structure. This paper reports the results of an experimental investigation into the development of pervious concrete with reduced cement content and recycled concrete aggregate for sustainable permeable pavement ...

Experimental Study of Compressive Strength of Recycled ...

Total four concrete mix batches were tested in which one mix was of normal aggregate concrete at 0% replaced by RCA and other are of Recycled aggregate concrete at 20%, 40% and 60% replaced by RCA. The result of the test are shown in the table 1.The compressive strength of the specimens was calculated by following formula.

Recycling of Brick Aggregate Concrete as Coarse Aggregate ...

Also, in-situ strength of an old structure has been compared with the compressive strength of recycled aggregate concrete made with the recycled aggregate collected from the same structure. Based on this investigation, it is revealed that recycled brick aggregate can be used as coarse aggregate for making concrete of strength 20.7 to 31.0 MPa.

Mix Design and Properties of Recycled Aggregate Concretes ...

Aug 26, 2014· This work is devoted to the study of fresh and hardened properties of concrete containing recycled gravel. Four formulations were studied, the concrete of reference and three concretes containing recycled gravel with 30, 65 and 100 % replacement ratios. All materials were formulated on the basis of S4 class of flowability and a target C35 class of compressive strength according to the …

Concrete recycling

Concrete recycling is the use of rubble from demolished concrete structures. Recycling is cheaper and more ecological than trucking rubble to a landfill. Crushed rubble can be used for road gravel, revetments, retaining walls, landscaping gravel, or raw material for new concrete.Large pieces can be used as bricks or slabs, or incorporated with new concrete into structures, a material called ...

Recycled Concrete: The Pros and Cons

Buying Recycled Concrete Aggregate in NJ. Braen Stone is the leading manufacturer and supplier of a wide range of construction materials for sale throughout NJ and its neighboring areas. In addition to harvesting and producing materials, we also operate our own local concrete recycling plant.

(PDF) USE OF RECYCLED CONCRETE AGGREGATES IN …

Concrete made with recycled concrete aggregates having replacement percentage of 0%, 30% 50%, 70% and was used and were tested at 28 days curing. ... Chinese Concrete Journal 11: 67-70 ...

Use Of Recycled Aggregate In Concrete

Brett et al2 (2010) insist that the use of recycled aggregates in concrete is both economically viable & technically feasible. In addition to demolition waste sources, RA can also be composed of excess Concrete materials returned to the plant. Mirza and Saif3 have studied the effect of silica fume on recycled aggregate concrete characteristics.

Review Article ASSESSMENT OF RECYCLED AGGREGATE …

Journal of Engineering Research and Studies E-ISSN 0976-7916 JERS/Vol.II/ Issue I/January-March 2011/1-9 Review Article ASSESSMENT OF RECYCLED AGGREGATE CONCRETE Parekh D. N.1 and Dr. Modhera C. D.2 Address for Correspondence 1Research Scholar; Applied Mechanics Department; Sardar Vallbhbhai ...

Research Article A Study of Concrete Made with Fine and ...

natural aggregate concrete and a recycled aggregate concrete decreases with time. e relationship between compressive strength and the percentage of the recycled ne and coarse aggregates at days is presented in Figure . From these gures, the com-pressive …

Recycled Aggregates in Concrete • Aggregate Research ...

Recycled Aggregates () — Construction materials are increasingly judged by their ecological characteristics. Concrete recycling gains importance because it protects natural resources and eliminates the need for disposal by using the readily available concrete as an aggregate source for new concrete or pavement sub-base layers.

Recycled Plastics as Coarse Aggregate for Structural Concrete

There are many recycling plants across the world, but as plastics are recycled they lose their strength with the number of recycling. So these plastics will end up as earth fill. In this circumstance instead of recycling it repeatedly, if it is utilized to prepare aggregates for concrete, it will be a boon to the construction industry.

Recycled Aggregates

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.

Influence of recycled aggregate replacement and fly ash ...

The use of recycled aggregate and fly ash was investigated in pervious concrete. • The porosity, permeability, infiltration rate and clogging properties were analyzed. • The addition of recycled aggregate increased the permeability of concrete. • Fly ash provided a …

Microstructural Characterization of Concrete Prepared with ...

Mechanical Properties and ITZ Microstructure of Recycled Aggregate Concrete Using Carbonated Recycled Coarse Aggregate. Journal of Wuhan University of …

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 …

Use of RECYCLED AGGREGATES In CONCRETE

The extensive research on recycled concrete aggregate and recycled aggregate concrete (RAC) as started from year 1945 in various part of the world after second world war, but in a fragmented manner. First effort has been made by Nixon in 1977 who complied all the work on recycled aggregate carried out between 1945-1977 and prepared a state-of ...

Special Issue "New Trends in Recycled Aggregate Concrete"

In recent years, the amount of construction waste and recycled aggregate has been increasing every year in Korea. However, as the recycled aggregate is poor quality, it is not used for concrete, and the Korean government has strengthened the quality standards for recycled aggregate for concrete.

Influence of the shape of the natural aggregates, recycled ...

aggregate were used: Round Natural Aggregate (RNA), Natural Crushed Aggregate (NCA) and Recycled Aggregate from Concrete crushed (RAC),since the shape of the aggregates generally determines the mechanical properties; and yet very little is …

Tests show promise for recycled aggregate use in concrete ...

Nov 24, 2015· The research can be found in a paper titled "Horizontal Destructive Load Tests on Full-Scale Recycled Aggregates Concrete Structures", published by American Concrete Institute (ACI) Structural Journal. The research project included not only the seismic behavior experiments, but also dynamic characterization and vertical load tests on the ...

Suitability Investigation of Recycled Concrete Aggregates ...

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.

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

(2013). Use of recycled concrete aggregate in concrete: a review. Journal of Civil Engineering and Management: Vol. 19, No. 6, pp. 796-810.

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