Recycled Aggregate - an overview | ScienceDirect Topics

The use of recycled aggregate, in general terms, causes a reduction in concrete strength (Poon, Shui, Lam, Fok, & Kou, 2004) and elastic modulus, larger creep, and shrinkage deformations (Domingo-Cabo et al., 2009), as well as higher permeability of the concrete (Gómez-Soberón, 2002). In sum, concrete produced with RCA is generally of lower

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Recycling of Concrete (Recycling Coarse Aggregate) – IJERT

The Scope of Recycled concrete Aggregate should be increased as possible as.. REFERENCES. M. Rakshvir, – Research on recycled aggregates-based concrete-Waste Management & Research, Vol. 24, No. 3, 225-233, 2006. S. W. Tabsh , A. S. Abdelfatah (2006-2008) Influence of recycled concrete aggregates on strength properties of concrete

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Bond Splitting Strength of High-quality Recycled Coarse

The objective of this study is to determine the basic properties of recycled aggregate concrete when used for the beams of reinforced concrete structures. During a period of one year after the placement of concrete, regular observations were made to identify the magnitude of drying shrinkage cracks generated in the beams.

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Recycled Aggregate Concrete: Applications, Advantages

Recycled aggregate concrete (RAC) is produced in three major steps: Evaluation of Source concrete: The first step in production of RAC is to determine the quality of the source concrete. Properties and records of source concrete like strength, durability and composition are looked into for deciding the proper source concrete.

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Effect of recycled coarse aggregate on ... - SAGE Journals

In this paper, the effect of using recycled coarse aggregate (RCA) on the behavior of concrete is experimentally studied. The RCA is prepared by crushing and sieving of waste of standard compression test cubes having a compressive strength ranging between 25 MPa and 30 MPa.

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MAKING CONCRETE FROM RECYCLED MATERIALS

aggregates in new concrete. The Issue Making concrete out of recycled concrete aggregate, or RCA, can be a sustainable and cost-saving alternative to other aggregates. However, the quality of concrete made with RCA is dependent on the quality of the recycled material used. OTREC researchers Jason

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Recycled Aggregate Self Compacting Concrete

recycled aggregate concrete is still scarce. This study attempts to examine the influence of recycled aggregate on stren gth, permeability, acid attack, chloride penetration, and alkalinity of self compacting concrete. This research is an attempt to provide very useful information for the practical

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EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON PROPERTIES

Jul 14, 2020 · The objective of this study is to investigate the effect of recycled concrete aggregate (RCA) quality on the properties of hardened concrete properties such as compressive strength, splitting tensile strength, density, water absorption capacity and porosity accessible to water.

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journals on recycled aggregates

Use Of Recycled Aggregate In Concrete IJERT Journal. Use of Recycled Aggregate in ConcreteWorking Sub-Group on Construction and Demolition 

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Recycled Concrete as an Alternative Coarse Aggregate for

Also, this investigation determined whether there is a significant difference in flexural strength between concrete with recycled concrete and that with gravel as coarse aggregates. Experimental design was the method implemented and this involved four sets of different mixtures with three samples for each mixture.

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Microstructure of Concrete with Aggregates from Construction

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-ray spectroscopy (EDS) analyses were performed.

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Quality Improvement Techniques for Recycled Concrete

Quality Improvement Techniques for Recycled Concrete Aggregate: A review The main problem in using recycled concrete aggregate (RCA) as a construction material is due to the weak Journal of Sustainable Cement-Based Materials.

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Coated Recycled Aggregate Concrete ... - Global Journals

recycled aggregates having better surface texture. It is observed that 10% fly ash addition improves substantially the cube compressive strength (at all ages) of both natural aggregate concrete and recycled aggregate concrete.Flyash addition modifies the microstructure of the interfacial zone which leads to a better performance of the concrete.

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Mechanical properties of recycled aggregate concrete under

May 4, 2020 — Candappa, DC, Sanjayan, JG, Setunge, S (2001) Complete triaxial stress–strain curves of high-strength concrete. Journal of Materials in Civil 

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Neutralization of high pH and alkalinity effluent from

Use of recycled concrete aggregate (RCA) as highway basecourse material conserves aggregate, reduces energy consumption and CO 2 emissions, and may also decrease costs during construction. However, concerns remain over possible negative environmental impacts associated with high pH (>11) effluent from RCA in contact with water.

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Study on Mechanical Performance of Recycled Aggregate

Apr 18, 2020 — Study on Mechanical Performance of Recycled Aggregate Concrete with Modified Nano Silica in Cement. International Journal of Advanced 

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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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Wilolud Online Journals, 2008. INFLUENCE OF RECYCLED

The test results showed that the use of recycled concrete aggregate (RCA) reduces the compressive strength and this reduction increases with the increase in percentage of the RCA. Maximum decrement of about 33 % in strength or about 67 % of compressive strength development occurs when 100 % of RCA was used as substitute to coarse aggregate.

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recycled aggregate concrete journals

Dec 28, 2019 — International Journal of Engineering Trends and Technology. Concrete made with recycled aggregate produced from construction and 

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Studies on thermo-chemical treatment of recycled concrete

Apr 05, 2017 · The presence of cement paste is the most important factor affecting the quality of recycled concrete fine aggregates. This study aims to develop the thermo-chemical treatment for the purpose of removal of the cement paste adhering to recycled concrete fine aggregates. This study involves assessing the effectiveness of thermo-chemical treatment and comparing its efficiency with thermal and

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