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Properties of High-Workability Concrete with Recycled ...

2012-2-24  Properties of High-Workability Concrete with Recycled Concrete Aggregate Using the same W/C ratio, S/A ratio and HRWR dosage of control concrete,

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Use of Recycled Aggregate Concrete - IOSR Journals

2013-10-15  concrete properties like compressive strength, flexural strength, workability etc. are explained here for different ... cement could be offset by the lower cost of Recycled Concrete Aggregate (RCA). ... worldwide on the use of recycled aggregate in concrete. It also shows that globally the concrete construction .

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WORKABILITY STUDY FOR RECYCLED AGGREGATES

2012-5-28  Workability by slump cone was determined by using IS: 1199-1959[25] for RA concrete mixes. Concrete mixes were prepared ... recycled aggregate is occurred within first 10 min. It also indicates here that any washing treatment can be made to this aggregate for 10min can work properly.

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EFFECT OF RECYCLED COARSE AGGREGATE ON

2015-8-15  The effect of replacement of natural granite aggregate with recycled coarse aggregate on shear strength and workability of FRHSC has been evaluated at length in this paper. Keywords : Cement, Natural fine aggregate, Natural coarse aggregate, Recycled aggregate, Water, super plasticizer

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Use of Recycled Aggregate Concrete - JEA Conferences

2013-1-29  coarse aggregate was partly or totally replaced by recycled aggregates. Results showed that the use of recycled aggregates has an adverse effect on the workability of concrete.

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Workability and Rheology of Fresh Recycled

2016-10-2  Workability is the property that is usually referred to those freshly mixed concrete, or mortars, which can be easily mixed, placed into formwork, consolidated and finished.

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Properties of High-Workability Concrete with

2011-3-4  This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA was used to produce high-workability concrete substituting 0-100% ...

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Self-compacting recycled concrete: Relationships

In this way, a workability box that guarantees a good rheological behaviour in the SCRCs used in this work (designed with an effective w/c ratio between 0.44 and 0.47, designed with recycled concrete coarse aggregate and designed compensating the water absorption) can be defined.

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Recycled Aggregates - cement.org

The states that do use recycled concrete aggregate (RCA) in new concrete report that concrete with RCA performs equal to concrete with natural aggregates. ... Contractors placing the RCA concrete said the workability was similar to that of the virgin aggregate concrete and the placement had good finishability. Within four days, the placement ...

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Recycled Concrete as Aggregate for Structural Concrete ...

2015-2-24  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.

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Workability and Rheology of Fresh Recycled

2016-10-2  Workability is the property that is usually referred to those freshly mixed concrete, or mortars, which can be easily mixed, placed into formwork, consolidated and finished.

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Properties of High-Workability Concrete with

2011-3-4  This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA was used to produce high-workability concrete substituting 0-100% ...

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Properties of high-workability concrete with recycled ...

2011-6-3  ABSTRACT. This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA was used to produce high-workability concrete substituting 0-100% natural coarse aggregate (NCA) by weight.

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Influence of Aggregate on Workability of Self

The workability of self-compacting concrete is influenced greatly by aggregate. In this study, the effects of aggregate gradation, maximum particle size, sand percentage and particle shape on the workability of self-consolidating concrete were investigated.

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Rheological Properties of Recycled Aggregate Concrete ...

2015-5-24  workability of recycled aggregate concrete, a study of screening of admixtures was performed. For this ... Rheological Properties of Recycled Aggregate Concrete Using Superplasticizers . ) ) 597 properties of recycled aggregate concrete. Civil Engineering”.

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Green recycled aggregate concrete - ScienceDirect

Recycled aggregate concrete was made with fine natural and coarse recycled concrete aggregate. Fly ash, milled limestone, silica fume and metakaolin were used for replacement of 50% of cement content.

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Mechanical Properties Of Recycled Aggregates

Firstly, the workability of concrete manufactured with recycled concrete aggregate as well as natural course aggregate was investigated, keeping in view the variation of proportion of RCA to NCA for a constant water cement ratio and mixed design.

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Self-compacting recycled concrete: Relationships

In this way, a workability box that guarantees a good rheological behaviour in the SCRCs used in this work (designed with an effective w/c ratio between 0.44 and 0.47, designed with recycled concrete coarse aggregate and designed compensating the water absorption) can be defined.

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Effect of Metakaoline and Recycled Fine Aggregate on ...

The workability was found to decrease as the percentage of recycled fine aggregate was increased. Compressive strength of above mixes was determined using destructive and

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Influence-of-silica-fume-on-mechanical-and-physical

2016-7-6  Influence-of-silica-fume-on-mechanical-and-physical-properties-of-recycled-aggregate-concrete - H... 百度首页 登录 加入文库VIP 享专业文档下载特权 赠共享文档下载特权 ...

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Design of Normal Strength Concrete Mixtures with

2012-11-13  aggregate (RCA plus NA), fine aggregate, cement, and water remain constant, there should not be a loss in workability with an increase in the proportion of RCA as long as the inherently greater absorption of RCA (as compared with the absorption of NA)

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Influence of recycled concrete aggregates on strength ...

2013-4-12  The recycled aggregate concrete has a compressive strength of at least 76% and modulus of elasticity from 60% to 100% of the control mix. ...

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A Report on the Use of Recycled Aggregates in Low

2013-6-13  workability and consistency of the mix after the initial series of trials, 1/3 of the ... The I 00 kg of cement specified in the draft particular specification for concrete with recycled coarse aggregates was found to be adequate since all Mixes with I 00 kg of

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workability of recycled concrete aggregate

Properties of high-workability concrete with this study presents the effects of recycled concrete aggregate (rca) on the key fresh and hardened properties of concrete. rca was used to produce high-workability ...

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Durability Study for Normal Grade Concrete with Recycle ...

2013-6-13  recycled aggregate less than 20% replacement of the natural aggregate in concrete, the effect on the properties of concrete is little. However, when higher level of ... cement ratio and the workability of fresh concrete and results in a higher shrinkage and creep of the hardened concrete when compared with the concrete prepared with natural ...

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Experimental Investigation on the Propertiesof Recycled ...

2017-6-24  aggregate volume and the workability of CSA concrete shows also decreasein slump with increase in coconu t shell aggregate content of total aggregate volume.

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Recycled Aggregate Concrete Construction

Workability Recycled aggregate concrete made from crushed leftover concrete may in general require a small cement adjustment to compensate for increase in water demand. thus as the recycled aggregate concrete strength increases. there is a greater rate of slump loss. 40 MPa and 60 MPa – were made from each of these recycled concrete ...

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Study of recycled concrete aggregate quality and its ...

The presence of these fine particles in the recycled coarse aggregate may decrease the bond between the recycled aggregate and the new cement paste and increase the mixing water necessary to achieve fixed workability when the concrete is made .

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Experimental Studies on High Strength Concrete by using ...

2014-2-18  The concrete produced with recycled aggregate loses its workability more rapidly than the conventional concrete, because recycled aggregate is more porous than natural aggregate. Thus concrete with recycled aggregate may require more mixing water to achieve the same workability as original aggregate. ...

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Review Article ASSESSMENT OF RECYCLED AGGREGATE

2012-5-19  Similarly the properties of recycled aggregate concrete were also determined and explained here. Basic concrete properties like compressive strength, flexural strength, workability etc

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Workability and Compressive Strength of Recycled

Abstract: In order to study the mechanical behavior of recycled fine aggregate mortar, 11 kinds of different recycled fine aggregate replacement rate (ranged from 0% to 100%, level differential 10%) of cement mortar test specimens are designed.

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RECYCLED AGGREGATE CONCRETE - The Constructor

2018-10-7  For the recycled aggregate concrete it will be necessary to add more cement in concrete made with 100% of recycled aggregate in order to achieve the same workability and compression strength as conventional concrete.

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Properties of high-workability concrete with recycled ...

2018-9-20  this study presents the effects of recycled concrete aggregate (rca) on the key fresh and hardened properties of concrete. rca was used to produce high-workability concrete substituting 0-100% natural coarse aggregate (nca) by weight. the slump and

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Performance of concrete with recycled aggregates

2008-6-2  Performance Of Concrete With Recycled Aggregates H.S. Pietersen” and A.L.A. Fraay ... a recycled aggregate is a granular material, resulting from an industrial process ... concrete which does not have to meet the highest standards with respect to workability, flowability, strength and/or durability. In the Netherlands, roughly 80% of the ...

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Recycled Aggregate Concrete - SlideShare

It is called recycled aggregate which can be produced by concrete crusher. The aggregates are categorized by size as coarse and fine aggregate. The characteristic of recycled aggregates could be different by its parent concrete because the parent concrete was designed for its purposes such as permeable, durable and high strength concrete

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Tarmac Recycled Aggregates

Tarmac is the largest supplier of recycled aggregates in the UK Working with our partners across the supply chain we help our customers meet their individual and legislative sustainability commitments.

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Performance of Recycled Aggregate Concrete for M40

2017-5-25  Key Words: Recycled aggregate, workability, compression strength, indirect tensile strength, flexural strength, modulus of elasticity. 1.INTRODUCTION Concrete is a composite construction material composed primarily of aggregate, cement and water. It

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Use of High Fineness of Fly Ash to Improve Properties of ...

sive strength and workability of recycled aggregate concrete, but also increase use of fly ash and reduce the amount of fly ash sent to landfills. This study investigated high fineness of fly ash as a cement replacement in concrete containing high levels of recycled aggre-

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THE EFFECTS OF AGGREGATE MOISTURE CONDITIONS

2018-3-19  the effects of aggregate moisture conditions on rheological behaviors of high-workability mortar with fine recycled-concrete aggregate committee members approved:

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EXPERIMENTAL INVESTIGATION ON RECYCLED PLASTICS

2015-4-21  recycled plastic waste to replace 25%, 50%, 75% and 100% of the volume of crushed granite in the control concrete. The compacting factor test was used to assess the workability

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