Recycled Aggregates Effect on Concrete Mechanical
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Recycled Aggregates Effect on Concrete Mechanical .

EFFECT OF RECYCLED AGGREGATES ON THE

2018-10-5  Abstract - Recycled aggregates are the aggregates which are retrieved from the demolished structures. Basic difference of these aggregates from natural aggregates is the adhered mortar on the surface of aggregates which is left over the old concrete. When recycled aggregates are used in concrete mix, these aggregates absorb part of the water which is initially calculated for the cement hydration and it adversely affect some other characteristics of the concrete such as strength and durability. One of the most significant issues that determine the strength characteristics are the types of coarse aggregates in recycled concrete. This study is aiming to investigate experimentally the effect of recycled aggregates in concrete which are obtained from laboratory waste. This investigation also aims to determine the influence of pre-saturation and polymer impregnation on mechanical properties of recycled aggregate concrete.

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Effect of mixed recycled aggregates on mechanical ...

Effect of mixed recycled aggregates on mechanical properties of recycled concrete Rodrı´guez-Robles, Garcı´a-Gonza´lez, Juan-Valde´s, Mora´n-Del Pozo and Guerra-Romero

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(PDF) Mechanical properties of recycled aggregate concrete

Their influence on concrete mechanical properties is investigated. As a result, it has been obtained that using recycled aggregate to replace part of the normal coarse aggregate effects

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The effect of multi-recycling on the mechanical ...

2018-11-10  The specific purpose was to study the mechanical performance of concrete designed with incorporation of coarse recycled aggregates from three successive recycling cycles at two replacement ratios, 25% and 100%, comparing it with that of a reference concrete, a mix with the same composition but where all aggregates are natural.

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Effect of pozzolan slurries on recycled aggregate concrete ...

2021-3-22  Using recycled concrete aggregate (RCA) as a partial or full substitution for normal aggregate (NA) in cement concrete is becoming a desirable solution to handle the huge amount of (CDW). However, RCA possesses relatively higher porosity due to the adhered mortar, which often impedes its application in the construction industries.

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Superplasticizer’s efficiency on the mechanical properties ...

2017-10-30  The most investigated type of RAC tested so far is RAC resorting to recycled concrete aggregates (RCA). The material and mechanical , , the durability , , and the structural , properties and behaviour of recycled concrete aggregates concrete (RCAC) advocate for its use as a structural material. The knowledge on CDW RAC is more limited.

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Effect of NO2 sequestered recycled concrete aggregate ...

2020-11-1  This paper presents the mechanical and durability performance of ordinary portland cement (OPC) concrete containing NO 2 sequestered recycled concrete aggregate (NRCA). NRCA was used as a partial replacement for natural fine aggregate at 20% and 40% rates by volume.

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The effect of superplasticizers on the mechanical ...

2012-10-1  Further studies are needed to understand how superplasticizers can affect the durability performance of concrete made with fine recycled concrete aggregates and to compare it with their influence on the performance of concrete made with coarse concrete recycled aggregates, both in mechanical terms and durability terms .

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A Mechanical Treatment Method for Recycled Aggregates

2021-8-3  Recycle concrete aggregates (RCA) consist of natural aggregates and remnant mortar adhered to their surface. The amount, size, and morphology of the adherent remainder paste influences quality aspects of RCA, such as their bonding potential with new cement matrix in an RCA-based concrete, as well as the concrete’s overall rheological and performance characteristics.

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Effect of mix design methods on the mechanical properties ...

2020-10-1  1. Introduction. Recycling of concrete waste remains an important step in the pursuit of global environmental sustainability .This is because, the use of recycled aggregates (RA) not only saves the diminishing natural resources but also offers a relief to the pressure imposed on landfills .By RA here is meant the combination of recycled fine aggregate (RFA) and recycled coarse aggregate (RCA ...

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EFFECT OF RECYCLED AGGREGATES ON THE

2018-10-5  coarse aggregates in recycled concrete. This study is aiming to investigate experimentally the effect of recycled aggregates in concrete which are obtained from laboratory waste. This investigation also aims to determine the influence of pre-saturation and polymer impregnation on mechanical properties of recycled aggregate concrete.

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A Mechanical Treatment Method for Recycled Aggregates

2021-4-24  A Mechanical Treatment Method for Recycled Aggregates and Its Effect on Recycled Aggregate-Based Concrete. April 2021 ... beneficial or detrimental effect on the mechanical

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(PDF) Effect of fine recycled concrete aggregate on the ...

Effect of fine recycled concrete aggregate on the mechanical behavior of self-compacting concrete. ... designed parameters affect the mechanical properties of SCC with recycled aggregates.

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Evaluation of coarse recycled concrete aggregates effect ...

2021-5-10  This study presented is interested to identify the influence of the use of recycled concrete aggregates (RCA) on mechanical properties (compressive strength, tensile and Modulus of elasticity), rheological properties (workability, yield stress, and plastic viscosity), and total shrinkage of concrete. Coarse ordinary aggregates

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A Mechanical Treatment Method for Recycled Aggregates

2021-4-24  materials Article A Mechanical Treatment Method for Recycled Aggregates and Its Effect on Recycled Aggregate-Based Concrete Pericles Savva 1,* , Socrates Ioannou 2, Konstantina Oikonomopoulou 2, Demetris Nicolaides 3 and Michael Frixos Petrou 2 Citation: Savva, P.; Ioannou, S.; Oikonomopoulou, K.; Nicolaides, D.;

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EFFECT OF AGGREGATE GRADING ON THE FRESH AND MECHANICAL ...

"Effect of aggregate grading on the fresh and mechanical performance of recycled aggregate self compacting concrete", The Indian Concrete Journal, Vol. 95, No. 5, pp. 1-11. Recommended publications

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Influence of Impregnation of Recycled Concrete Aggregate ...

The paper focuses on investigating the effect of impregnation of recycled concrete aggregate on the mechanical and durability properties of concrete using this aggregate. Cement paste, limewater and diluted water glass were used to impregnate the aggregate. Both a single impregnation and a double impregnation using two different solutions were carried out.

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The effect of superplasticizers on the mechanical ...

2012-10-1  Further studies are needed to understand how superplasticizers can affect the durability performance of concrete made with fine recycled concrete aggregates and to compare it with their influence on the performance of concrete made with coarse concrete recycled aggregates, both in mechanical terms and durability terms .

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A Mechanical Treatment Method for Recycled Aggregates

Following the treatment process, the aggregates were utilized in concrete combinations at w/c ratios 0.50 and 0.25, aiming to study their effect on the mechanical properties and durability of concrete with natural crushed and recycled aggregates, at strategic increments in the mix design.

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Effect of mixed recycled aggregates on mechanical ...

2015-9-1  The present research assesses first the suitability of two different mixed recycled aggregates as coarse aggregates for concrete according to the code on structural concrete (EHE-08), and subsequently evaluates the effect of their use as a partial (50%) replacement of natural coarse aggregate (gravel) on the mechanical properties (compressive ...

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Effect of Mixed Recycled Aggregate on the Mechanical ...

Mixed recycled aggregate (MRA) is a kind of recycled aggregate containing discarded bricks and other impurities that is inferior to ordinary recycled concrete aggregate. To study the effect of MRA in concrete, specimens with 100% MRA under different water-cement ratios (W/C) of 0.50, 0.42, 0.36 and 0.30 were prepared, and the mechanical ...

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Effect of Mixed Recycled Aggregate on the Mechanical ...

2021-5-18  Abstract: Mixed recycled aggregate (MRA) is a kind of recycled aggregate containing discarded bricks and other impurities that is inferior to ordinary recycled concrete aggregate. To study the effect of MRA in concrete, specimens with 100% MRA under different water–cement ratios (W/C)

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Effect of recycled coarse aggregates enhanced by CO2 on ...

Effect of recycled coarse aggregates enhanced by CO 2 on the mechanical properties of recycled aggregate concrete. Surong Luo 1, Wenda Wu 1 and Kaiyun Wu 1. Published 1 October 2018 • Published under licence by IOP Publishing Ltd IOP Conference Series: Materials Science and Engineering, Volume 431, Issue 10

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Effect of Recycled Coarse Aggregate Type on Concrete ...

2014-5-13  The types of aggregate used represent the three main constituents within recycled aggregates: unbound stone, crushed concrete, and crushed brick. Tests for mechanical properties of different types of recycled aggregate included crushing value and abrasion resistance.

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Effect of recycled coarse aggregate on physical and ...

2020-10-16  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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Influence of Impregnation of Recycled Concrete Aggregate ...

The paper focuses on investigating the effect of impregnation of recycled concrete aggregate on the mechanical and durability properties of concrete using this aggregate. Cement paste, limewater and diluted water glass were used to impregnate the aggregate. Both a single impregnation and a double impregnation using two different solutions were carried out.

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EFFECT OF DIFFERENT TYPES OF FIBER UTILIZATION ON ...

2020-4-7  The addition of recycled aggregates in concrete increases shrinkage, porosity and decreases the mechanical properties compared to that of normal concrete. This study was aimed at investigating how the addition of various proportions of polypropylene and steel fiber affect the mechanical properties of recycled aggregate concrete (RAC).

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Effect of Admixture on Physical and Mechanical Properties ...

2021-6-27  Six different mixes are considered with 100% replacement of recycled brick aggregate and three diverse water-cement (w/c) ratios, such as 0.40, 0.45, and 0.50. To improve the workability and mechanical characteristics of concrete a superplasticizer is used as an admixture.

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