mix design and recycled aggregates effects on the concrete

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Mix Design and Recycled Aggregates Effects on the Concrete ...

29/06/2017  This research aimed, at first, studying the effects of mix design parameters (cement paste volume, water and air), the characteristics of aggregates and the interface aggregates-cement paste quality on the water porosity, the electrical resistivity and the compressive strength of concretes. The studied concretes are formulated with natural and recycled fine and coarse aggregates provided

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Mix Design and Recycled Aggregates Effects on the Concrete ...

RESEARCH PAPER Mix Design and Recycled Aggregates Effects on the Concrete’s Properties Safiullah Omary1 • Elhem Ghorbel1 • George Wardeh1 • Minh Duc Nguyen1 Received: 10 January 2017 ...

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Mix Design and Recycled Aggregates Effects on the Concrete ...

Mechanical properties of demolishing waste [4], compressive strength [5], effect of fly ash [18], effect of cement proportion [21], effect of recycled aggregates on mix design [22], and durability ...

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Mix Design and Recycled Aggregates Effects on the Concrete ...

The effect of mix design parameters and aggregates properties on the compressive strength has been investigated and a model is proposed on the basis of Féret’s expression through experimental results and data points available in the literature. The modified expression is related to the aggregate fragmentation resistance expressed by the Los Angeles coefficient (LA). The Féret’s ...

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Mix Design and Properties of Recycled Aggregate Concretes ...

26/08/2014  At fresh state, the mix design of concrete with recycled aggregates requires an additional quantity of water to obtain a similar workability as a concrete formulated with natural aggregates (Hansen and Boegh 1986). Such a modification may obviously affect the mechanical characteristics of recycled aggregates concrete. Several studies have investigated the microstructure of recycled aggregates ...

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Mix Design and Recycled Aggregates Effects on the Concrete ...

The effect of mix design parameters and aggregates properties on the compressive strength has been investigated and a model is proposed on the basis of Féret’s expression through experimental results and data points available in the literature. The modified expression is related to the aggregate fragmentation resistance expressed by the Los Angeles coefficient (LA). The Féret’s ...

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Studying the mix design and investigating the ...

01/03/2020  Following the Technical Specification for Application of Pervious Recycled Aggregate Concrete ... Using the F-test to evaluate the effects of independent mix design variables on concrete strength can be found in several existing studies (e.g., Jin et al., 2018b). The null hypothesis was that the given independent variable did not have a significant effect on pervious concrete strength. The ...

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Mix design for pervious recycled aggregate concrete

Mix Design for Pervious Recycled Aggregate Concrete ... cement had marginal effect on the strength of pervious concrete having the same void content. Murao et al. (2002) reported that the strength of pervious concrete at a given porosity is reduced when the recycled aggregate is from 15 MPa concrete compared to that from 25 MPa concrete. This paper discusses the results of an experimental ...

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Effects of recycled concrete aggregate on the fresh ...

Effects of recycled concrete aggregate on the fresh properties of self-consolidating concrete ... aided to calculate its water contribution to concrete mix. 3.2. Concrete mix proportions Nine trial concrete mixes using NCA were prepared with different W/C ratios (0.50, 0.60, and 0.65) and HRWR dosages. The basic mix proportions (without HRWR dos-age) of these concretes were determined based on ...

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

25/06/2019  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.

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EFFECTS OF RECYCLED CONCRETE AGGREGATES ON

EFFECTS OF RECYCLED CONCRETE AGGREGATES ON PROPERTIES OF ASPHALT CONCRETE . Sumeda Paranavithana . VicRoads, Australia . Abbas Mohajerani School of Civil Chemical Engineering, RMIT University, GPO Box 2476V, Melbourne, Australia, 3001 * Corresponding author. Tel +613 9925 3082; Fax +613 9639 0138 . E-mail address: [email protected] . Paranavithana, S and Mohajerani, A 2006, 'Effects

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Evaluation of Effects of Recycled Concrete Aggregate on ...

01/01/2011  This use of recycled concrete aggregate (RCA) as an HMA aggregate can be beneficial for constructing low-volume roads. RCA differs from virgin aggregates in that there is cement paste on the surface of the recycled concrete. In this study, 5% RCA was evaluated as an HMA aggregate. Mix designs were conducted, and the effect of RCA on the volumetrics of HMA was evaluated. The mix design

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Recycling of Concrete (Recycling Coarse Aggregate)

Keywords—Recycled Coarse Aggregate (RCA), Concrete Mix Design(CMD), Natural Aggregate(NA) I. INTRODUCTION As we know the term ‘concrete” is a mixture of cement + sand + coarse aggregate with water. Concrete is widely used in both substructure and super structure as main constructional material. It is most important substance of a structure. There is 3-R system in each industry which is ...

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EFFECT OF TEMPERATURE ON RECYCLED AGGREGATE CONCRETE

temperatures, the study on the effects of temperature on recycled aggregate concrete becomes very necessary. 2. PREVIOUS STUDIES 2.1 strength properties of recycled aggregate concrete M. Tavakoli and Soroushian [6], found that the strength characteristics of recycled aggregate concrete were influenced by the strength of the original concrete, the ratio of coarse aggregate to fine aggregate in ...

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Materials Free Full-Text The Simple Mix Design Method ...

For the environment protection and sustainable development in building construction, waste concrete can be processed into recycled aggregate to mix the recycled aggregate concrete (RAC). However, the existing mix design methods of RAC were complex, and the mechanical properties of RAC were more weakened than ordinary concrete. This paper presents a simple mix design method for RAC,

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

25/06/2019  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.

Get Price

Effects of recycled concrete aggregate on the fresh ...

Effects of recycled concrete aggregate on the fresh properties of self-consolidating concrete ... aided to calculate its water contribution to concrete mix. 3.2. Concrete mix proportions Nine trial concrete mixes using NCA were prepared with different W/C ratios (0.50, 0.60, and 0.65) and HRWR dosages. The basic mix proportions (without HRWR dos-age) of these concretes were determined based on ...

Get Price

Mix design for pervious recycled aggregate concrete

Mix Design for Pervious Recycled Aggregate Concrete ... cement had marginal effect on the strength of pervious concrete having the same void content. Murao et al. (2002) reported that the strength of pervious concrete at a given porosity is reduced when the recycled aggregate is from 15 MPa concrete compared to that from 25 MPa concrete. This paper discusses the results of an experimental ...

Get Price

EFFECTS OF RECYCLED CONCRETE AGGREGATES ON

EFFECTS OF RECYCLED CONCRETE AGGREGATES ON PROPERTIES OF ASPHALT CONCRETE . Sumeda Paranavithana . VicRoads, Australia . Abbas Mohajerani School of Civil Chemical Engineering, RMIT University, GPO Box 2476V, Melbourne, Australia, 3001 * Corresponding author. Tel +613 9925 3082; Fax +613 9639 0138 . E-mail address: [email protected] . Paranavithana, S and Mohajerani, A 2006, 'Effects

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Recycled Aggregates for Concrete: Problems and Possible ...

Conventional Mix Design treats the recycled aggregate as one phase material, as one aggregate. The result is an excessive quantity of mortar, with attached mortar plus fresh mortar being added. In the EMV method, the two phases, aggregate and attached mortar, are considered as separate phases. The results of applying this new method demonstrated that 24% of cement could be saved compared to ...

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Mix Design Of Recycled Aggregate Concrete

Mix Design For Recycled Aggregaye Concrete. Mix Design and Properties of Recycled Aggregate Concretes . Aug 26 2014At fresh state the mix design of concrete with recycled aggregates requires an additional quantity of water to obtain a similar workability as a concrete formulated with natural aggregates Hansen and Boegh 1986 Such a modification ...

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Evaluation of Effects of Recycled Concrete Aggregate on ...

01/01/2011  This use of recycled concrete aggregate (RCA) as an HMA aggregate can be beneficial for constructing low-volume roads. RCA differs from virgin aggregates in that there is cement paste on the surface of the recycled concrete. In this study, 5% RCA was evaluated as an HMA aggregate. Mix designs were conducted, and the effect of RCA on the volumetrics of HMA was evaluated. The mix design

Get Price

Recycling of Concrete (Recycling Coarse Aggregate)

Keywords—Recycled Coarse Aggregate (RCA), Concrete Mix Design(CMD), Natural Aggregate(NA) I. INTRODUCTION As we know the term ‘concrete” is a mixture of cement + sand + coarse aggregate with water. Concrete is widely used in both substructure and super structure as main constructional material. It is most important substance of a structure. There is 3-R system in each industry which is ...

Get Price

EFFECT OF TEMPERATURE ON RECYCLED AGGREGATE CONCRETE

temperatures, the study on the effects of temperature on recycled aggregate concrete becomes very necessary. 2. PREVIOUS STUDIES 2.1 strength properties of recycled aggregate concrete M. Tavakoli and Soroushian [6], found that the strength characteristics of recycled aggregate concrete were influenced by the strength of the original concrete, the ratio of coarse aggregate to fine aggregate in ...

Get Price

Materials Free Full-Text The Simple Mix Design Method ...

For the environment protection and sustainable development in building construction, waste concrete can be processed into recycled aggregate to mix the recycled aggregate concrete (RAC). However, the existing mix design methods of RAC were complex, and the mechanical properties of RAC were more weakened than ordinary concrete. This paper presents a simple mix design method for RAC,

Get Price