properties of recycled concrete aggregate and their

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Properties of recycled concrete aggregate and their ...

Jun 01, 2018  1. Introduction. Concrete is known as one of the most highly consumed construction materials. The primary ingredients of a concrete mixture are cement, aggregates (coarse and fine), water and admixtures (Mindess et al., 2003; National Ready Mixed Concrete Association (NRMCA), 2012).Among the aforementioned components, aggregate takes up about 70% to 80% of concrete’s

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Properties of recycled concrete aggregate and their ...

Comparisons between the recycled concrete aggregate (RCA) and natural aggregate (NA), RCA concrete and normal concrete are comprehensively documented. The major concern related to the use of coarse and fine RCAs in a concrete mixture is due to the presence of old mortar that adhered on the surfaces of RCA particles.

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PROPERTIES OF RECYCLED AGGREGATE CONCRETE

concrete. Keywords: recycled aggregate concrete, construction and demolition waste, concre-te properties, research. 1. INTRODUCTION Recent floods, that struck our our country and the region, have caused widespread damage, among which damage to building structures is dominant. Society is not only faced with the problems of fin-

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Properties of recycled concrete aggregate under different ...

Dec 01, 2017  The coarse recycled concrete aggregate was obtained by crushing a laboratory produced primary concrete at age of 28 days.About 250 cubes of dimension 15 ∗ 15 ∗ 15 cm were crushed to produce the recycled coarse aggregates using mix design No.1 ().After crushing of these cubes, the maximum nominal size of recycled coarse aggregate used in mixes 2, 3 and 4 was 25 mm.

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Properties of concrete with recycled aggregates ...

Jan 01, 2013  Properties of fresh concrete using recycled aggregates. The use of RA has an important influence on fresh concrete properties, particularly affecting its workability. The high absorption properties of these aggregates, in addition to their heterogeneity, make it harder to adjust and control the consistency of the concrete. 12.2.1.

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Recycled Concrete Aggregates: Its Properties Uses

Jun 27, 2019  Recycled concrete aggregate as such, holds original aggregate with hydrated cement paste. Hence first, that demolished concrete is cleaned from dirt and other loose particles. After that, it is broken into smaller pieces to produce aggregate known as recycled concrete aggregate. Recycled concrete aggregates are available in size of 20mm to 50mm.

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Properties of recycled concrete aggregate and their ...

Request PDF On Jun 1, 2018, Kho Pin Verian and others published Properties of recycled concrete aggregate and their influence in new concrete production Find, read and cite all the research ...

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A Study on the Properties of Recycled Aggregate Concrete ...

applied sciences Article A Study on the Properties of Recycled Aggregate Concrete and Its Production Facilities Jung-Ho Kim 1,* , Jong-Hyun Sung 1, Chan-Soo Jeon 2, Sae-Hyun Lee 2 and Han-Soo Kim 3 1 Technology Research Center, Hallaencom, 1170-5, Poseunghyangnamro, Hwaseong-si, Gyeonggi-do 18572, Korea; [email protected]

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PROCESSING AND PROPERTIES OF RECYCLED AGGREGATE

properties are well-known factors of recycled aggregate concrete(RAC): a lower density, elastic modulus, strength and a higher water absorption capacity. Due to the fact that recycled aggregate has a proportional mortar which attached to aggregate, it gives a higher porosity and a lower strength to RAC than the normal concrete.

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Properties and composition of recycled aggregates from ...

Aug 29, 2014  Properties of concretes with recycled aggregates: influence of properties of the aggregates and their interpretation R.K. Dhir , N.A. Henderson , M.C. Limbachiya (Eds.) , Proceedings of the international symposium on sustainable construction: use of recycled concrete aggregate , Thomas Telford , London (UK) ( 1998 ) , pp. 19 - 30

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PROPERTIES OF CONCRETES WITH RECYCLED AGGREGATES ...

Jul 07, 2015  The production of concrete with recycled aggregate is the most desirable form of achieving a closed life cycle for concrete as a construction material. This paper describes results of a study undertaken to examine the influence of recycled aggregate on the properties of new concrete.

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Mechanical Properties Of Recycled Aggregates Concrete ...

2.7 RECYCLED AGGREGATE CONCRETE: A SUSTAINABLE BUILT ENVIRONMENT. In the present study the influence of recycled coarse aggregate (RCA) obtained from three different sources having different ages of structures are on the properties of recycled aggregate concrete (RAC) are investigated. RAC mixes are prepared with each source of RCA separately.

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Recycled Concrete Aggregates and Their Influences on ...

Sep 19, 2020  A comprehensive literature review of the fresh concrete properties produced with recycled aggregate has been carried out by Silva et al. [3] and also discussed in many other publications [4–7]. The e ects of variables such as the overall quality of recycled aggregates and its moisture ratio on the

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Crushed Concrete Aggregates - Properties and Uses of ...

Crushed concrete aggregate conform with ASTM international with regard to los angeles abrasion loss. 6. Contaminants Present of contaminants in recycled aggregate decline strength of concrete produced with this aggregate. Influence of Recycled Aggregate on Concrete Properties 1. Concrete

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Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015  This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete.

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Self-Compacting Concrete Properties of Recycled Coarse ...

Hardened concrete from concrete building demolition can be used to partially replace natural coarse aggregate in self-compacting concrete. The current study compares the properties of self-compacting concrete with 0 percent, 25%, 50%, 75%, and 100% substitution of recycled coarse aggregate in the fresh and hardened states.

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The effect of initial strength of concrete wastes on the ...

Three parent concretes with strength of 20, 40, and 80 MPa were used for recycling. Table 1 presents the mix designs of parent concretes. In the construction of all three types of parent concretes, similar aggregates and ordinary Portland cement based on ASTM C150 were used. The density values for fine and coarse aggregates were 2.60 and 2.66 g r / c m 3, respectively.

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(PDF) Influence of amount of recycled coarse aggregates ...

Recycled aggregates were used in wet condition, but not saturated, to control their fresh concrete properties, effective w/c ratio and lower strength variability. The necessity to produce recycled aggregate concrete with low–medium compressive strength was verified due to the requirement of the volume of cement.

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Shear Strength of Reinforced Recycled Aggregate Concrete ...

Dec 18, 2020  This paper is related to a laboratory program for the shear strength of reinforced concrete corbels (RCC) cast with or without recycled aggregate (RA) by investigating the main parameters affecting the corbels behavior including the replacement aggregate recycling ratio, fcu , and shear span to effective depth ratio a/d. Eight specimens were cast and tested.

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The Chemical-Mineralogical Characterization of Recycled ...

The incorporation of a recycled concrete aggregate (RCA) as a replacement of natural aggregates (NA) in road construction has been the subject of recent research. This tendency promotes sustainability, but its use depends mainly on the final product's properties, such as chemical stability.

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PROCESSING AND PROPERTIES OF RECYCLED AGGREGATE

properties are well-known factors of recycled aggregate concrete(RAC): a lower density, elastic modulus, strength and a higher water absorption capacity. Due to the fact that recycled aggregate has a proportional mortar which attached to aggregate, it gives a higher porosity and a lower strength to RAC than the normal concrete.

Get price

PROPERTIES OF CONCRETES WITH RECYCLED AGGREGATES ...

Jul 07, 2015  The production of concrete with recycled aggregate is the most desirable form of achieving a closed life cycle for concrete as a construction material. This paper describes results of a study undertaken to examine the influence of recycled aggregate on the properties of new concrete.

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MECHANICAL AND DURABILITY PROPERTIES OF

Mechanical and durability properties of recycled aggregate concrete (RAC) made with different replacement levels of recycled coarse aggregate (RCA). Submitted to Construction and Building Materials. Huda, S.B. and Alam, M.S. 2014. Mechanical behavior of three generations of 100% repeated recycled coarse aggregate concrete.

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Mechanical Properties of Recycled Aggregate

Jun 01, 2021  Fundamental concrete properties such as compressive power, bending strength, operability and so for the numerous combinations of recycled aggregates and natural aggregates are discussed here. Codal recommendations for recycled concrete aggregates in different countries are listed here, with their influence on concretion function.

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(PDF) Influence of amount of recycled coarse aggregates ...

Recycled aggregates were used in wet condition, but not saturated, to control their fresh concrete properties, effective w/c ratio and lower strength variability. The necessity to produce recycled aggregate concrete with low–medium compressive strength was verified due to the requirement of the volume of cement.

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(PDF) The influence of recycled concrete aggregate on the ...

Use of Recycled Coarse Aggregate (RCA) in concrete can be described in terms of environmental protection and economy. This paper deals with the mechanical properties of concrete compressive ...

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Materials Special Issue : Properties and Novel ...

The recycling of construction materials such as concrete aggregates and mixed aggregates and their subsequent application in new constructions leads to the inclusion of the construction sector in the circular economy, avoiding the accumulation of waste and the consumption of natural resources.

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Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015  This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete.

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Influence of amount of recycled coarse aggregates and ...

control their fresh concrete properties, effective w/c ratio and lower strength variability. The necessity to produce recycled aggregate concrete with low–medium compressive strength was verified due to the requirement of the volume of cement.

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Self-Compacting Concrete Properties of Recycled Coarse ...

Hardened concrete from concrete building demolition can be used to partially replace natural coarse aggregate in self-compacting concrete. The current study compares the properties of self-compacting concrete with 0 percent, 25%, 50%, 75%, and 100% substitution of recycled coarse aggregate in the fresh and hardened states.

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(PDF) Influence of the Quality of Recycled Aggregates on ...

Influence of the Quality of Recycled Aggregates on the Mechanical and Durability Properties of High Performance Concrete. Waste and Biomass Valorization. Miren Etxeberria. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

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Recycled Concrete as Aggregate for Structural Concrete ...

The results of recycled concrete aggregate testing are shown in Table 2 and grading curves in Figure 5. Properties of natural and recycled concrete aggregate were tested according to Serbian standards for natural aggregates and quality requirements given in Tables 1 and 2 are also according to Serbian

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Examining the Influence of Recycled Concrete Aggregate on ...

Apr 02, 2020  Abstract Along with the growing development of countries around the world, there are huge amounts of construction and demolition works which produce large volumes of recycled concrete aggregate (RCA) and these are increasing over the past few decades. One of the more practical ways to manage the RCA wastes is through re-using them as aggregate to produce concrete. In this paper,

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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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