improvement of recycled concrete aggregate properties by

Improvement of recycled concrete aggregate properties by ...

Dec 01, 2013  The recycling of concrete, bricks and masonry rubble as concrete aggregates is an important way to contribute to a sustainable material flow. The limited reuse of recycled concrete aggregates (RCA), even partially, instead of natural aggregates, can be explained by the influence on the properties of fresh and hardened new RCA-based concretes.

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THE IMPROVEMENT OF RECYCLED CONCRETE AGGREGATE A

improvement the properties of recycled concrete aggregate. This paper reviews the published improvement methods for recycled concrete aggregate, and points out their advantages and disadvantages so as to facilitate the selection and further development of suitable enhancement methods for recycled concrete aggregate.

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Improvement Properties of Recycle Concrete using Clay ...

hardened properties of recycled concrete improved by reducing the water/ cement, increasing admixture/ cement and using silica fume. Curing in salts decreased the compressive strength of recycled concrete compared to curing in water. Keywords: recycled concrete, clay brick, recycled aggregate, aggregate, curing conditions, durability, Polymer ...

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Properties enhancement of recycled aggregate concrete ...

Aug 01, 2018  In this study, the intrinsic properties of recycled coarse aggregates (RC), associated with bonded mortar, were modified with two different pretreatment techniques viz-a-viz HCl pretreatment and Na 2 SO 4 pretreatment, while maintaining a fixed aggregate-to-solution ratio of 1:4.5. The residual bonded mortar was quantified to evaluate the potential of both techniques.

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Treatment Methods for the Quality Improvement of Recycled ...

Jan 24, 2021  10%  Spaeth V, Djerbi Tegguer A. Improvement of Recycled Concrete Aggregate Properties by Polymer Treatments[J]. Int. J. Sustainable Built. Environ., 2013, 2(2): 143–152. CAS Article Google Scholar [51] Kou S C, Poon C S. Properties of Concrete Prepared with PVA-Impregnated Recycled Concrete Aggregates[J]. Cem. Concr.

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Improvement Properties of Recycle Concrete using Clay ...

hardened properties of recycled concrete improved by reducing the water/ cement, increasing admixture/ cement and using silica fume. Curing in salts decreased the compressive strength of recycled concrete compared to curing in water. Keywords: recycled concrete, clay brick, recycled aggregate, aggregate, curing conditions, durability, Polymer ...

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Properties enhancement of recycled aggregate concrete ...

Aug 01, 2018  In this study, the intrinsic properties of recycled coarse aggregates (RC), associated with bonded mortar, were modified with two different pretreatment techniques viz-a-viz HCl pretreatment and Na 2 SO 4 pretreatment, while maintaining a fixed aggregate-to-solution ratio of 1:4.5. The residual bonded mortar was quantified to evaluate the potential of both techniques.

get price

Treatment Methods for the Quality Improvement of Recycled ...

Jan 24, 2021  Spaeth V, Djerbi Tegguer A. Improvement of Recycled Concrete Aggregate Properties by Polymer Treatments[J]. Int. J. Sustainable Built. Environ., 2013, 2(2): 143–152. CAS Article Google Scholar [51] Kou S C, Poon C S. Properties of Concrete Prepared with PVA-Impregnated Recycled Concrete Aggregates[J]. Cem. Concr.

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Improvement on properties of recycled concrete with coarse ...

(2020). Improvement on properties of recycled concrete with coarse ceramic vase aggregates using KH-550 surface treating technology. European Journal of Environmental and Civil Engineering: Vol. 24, No. 1, pp. 1-16.

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Critical Review of Recycled Aggregate Concrete Properties ...

Nov 11, 2020  In addition to further research regarding the improvement of properties of concrete made with recycled aggregates, the development of numerical models that accurately represent the behavior of recycled aggregate concrete under loading

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Quality Improvement of Recycled Aggregate Concrete

The properties of recycled aggregate such as water absorption, specific gravity, impact value, and abrasion value and the properties of RCAC like compressive strength, flexural strength, and split tensile strength along with durability properties decide the quality of concrete.

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

aggregate fine powder, and impurities. The characteristics of concrete using a recycled aggregate type and ratio were studied. 2. Scope and Method of Research In this research, the quality improvement of the recycled fine aggregate and the characteristics of concrete using recycled aggregate have been studied through the following studies.

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Quality Improvement Techniques for Recycled Concrete ...

Abstract. The main problem in using recycled concrete aggregate (RCA) as a construction material is due to the weak adhered mortar which usually has higher porosity and water absorption. It also has lower strength compared to natural aggregate (NA), and it often forms weak interfacial transition zones in the recycled aggregate concrete (RAC).

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Recycled Concrete Aggregates – Its Uses, Properties ...

Aug 18, 2020  History. Recycled concrete aggregates or Crushed concrete aggregates has been in use since the ancient times, only to be integrated with gravel, sand, and cement to ensure durability. The practice was first recorded in the 1860s. US construction companies were reluctant to use the technique at first since crushing cured concrete proved to be much more cost-intensive in terms of labor.

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Quality Improvement of Recycled Aggregate Concrete using ...

Quality Improvement of Recycled Aggregate Concrete using Six Sigma DMAIC Methodology Suhas Vijay Patil Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.. Balakrishna Rao K. Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka,

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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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Materials Special Issue : Properties and Novel ...

Improvement of properties through different treatments; Use of recycled concrete and mixed recycled aggregates in novel construction materials; New techniques for the study of mechanical properties and durability of different types of recycled construction materials; Leaching properties of recycled mixed aggregates and concrete; Evaluation of ...

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Aggregates for Concrete

mately 60 to 75% of the volume of concrete. Aggregate properties significantly affect the workability of plastic concrete and also the durability , strength, thermal properties, and density of hardened concrete. This Bulletin describes types of aggregates normally used in concrete, aggregate properties affecting performance of

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Enhancement of properties of recycled coarse aggregate ...

Due to rapid construction, necessity for raw materials of concrete, especially coarse aggregate, tends to increase the danger of early exhaustion of the natural resources. An alternative source of raw materials would perhaps delay the advent of this early exhaustion. Recycled coarse aggregate (RCA) plays a great role as an alternative raw material that can replace the natural coarse aggregate ...

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( 1 ) IMPROVEMENT OF CONCRETE PROPERTIES MADE

IMPROVEMENT OF CONCRETE PROPERTIES MADE FROM-RECYCLEDCONCRETE AGGREGATE USING NON TRADITIONAL ADMIXTURE Yehia A. Hassanean, M.M. Rashwan, Kamal A. Assaf, Khaled Abd el Samee Abstract: The aim of this work is to improve the fresh and hardened concrete properties made from recycled concrete aggregate, by

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

aggregate fine powder, and impurities. The characteristics of concrete using a recycled aggregate type and ratio were studied. 2. Scope and Method of Research In this research, the quality improvement of the recycled fine aggregate and the characteristics of concrete using recycled aggregate have been studied through the following studies.

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Chloride ion permeability improvement of recycled ...

T1 - Chloride ion permeability improvement of recycled aggregate concrete using pretreated recycled aggregates by silica fume slurry. AU - Sasanipour, Hossein. AU - Aslani, Farhad. AU - Taherinezhad, Javad. PY - 2021/2/8. Y1 - 2021/2/8

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[PDF] Treatments for the Improvement of Recycled Aggregate ...

The microstructure of recycled aggregate prepared from the crushing of old concrete was studied. It was found that the recycled aggregate is covered with loose particles that may prevent good bonding between the new cement matrix and the recycled aggregate. The old cement paste that remained on the natural aggregate was porous and cracked, leading to weak mechanical properties of the recycled ...

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Quality Improvement Techniques for Recycled Concrete ...

Abstract. The main problem in using recycled concrete aggregate (RCA) as a construction material is due to the weak adhered mortar which usually has higher porosity and water absorption. It also has lower strength compared to natural aggregate (NA), and it often forms weak interfacial transition zones in the recycled aggregate concrete (RAC).

get price

Recycled Concrete Aggregates – Its Uses, Properties ...

Aug 18, 2020  History. Recycled concrete aggregates or Crushed concrete aggregates has been in use since the ancient times, only to be integrated with gravel, sand, and cement to ensure durability. The practice was first recorded in the 1860s. US construction companies were reluctant to use the technique at first since crushing cured concrete proved to be much more cost-intensive in terms of labor.

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Improvement of recycled concrete aggregate using

AlcoholModified Pavement Concrete Using Concrete RecycledAggregates 165 6.1.2 Recycled Concrete Aggregate Modified with Polyvinyl Alcohol and Fly Ash for Concrete Pavement Applications 165 6.1.3 Effect of Cement Stabilization of Recycled Concrete Aggregates Modified with Polyvinyl Alcohol: Mechanical andMicro-Scale Properties 166

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Enhancement of properties of recycled coarse aggregate ...

Due to rapid construction, necessity for raw materials of concrete, especially coarse aggregate, tends to increase the danger of early exhaustion of the natural resources. An alternative source of raw materials would perhaps delay the advent of this early exhaustion. Recycled coarse aggregate (RCA) plays a great role as an alternative raw material that can replace the natural coarse aggregate ...

get price

Quality Improvement of Recycled Aggregate Concrete using ...

Quality Improvement of Recycled Aggregate Concrete using Six Sigma DMAIC Methodology Suhas Vijay Patil Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.. Balakrishna Rao K. Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka,

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Aggregates for Concrete

mately 60 to 75% of the volume of concrete. Aggregate properties significantly affect the workability of plastic concrete and also the durability , strength, thermal properties, and density of hardened concrete. This Bulletin describes types of aggregates normally used in concrete, aggregate properties affecting performance of

get price

The Effect of Recycled Concrete Aggregates and Metakaolin ...

Oct 03, 2018  In general, the mechanical properties of self-compacting concrete containing 2 wt% of SiO 2 nanoparticles with the addition of metakaolin as an additive of cement up to 20 wt% improve the mechanical properties of concrete, and by increasing the substitution percentage of recycled aggregates, the mechanical properties are reduced.

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Effect of Recycled Aggregate on Mechanical and Durability ...

Aggregate Concrete formed with air-dried Reusing Aggregate and Reusing Aggregate Concrete prepared with saturated surface dry (SSD) Recycling Aggregate. It was seen that SSD RA have the lower compressive strength and the reason behind this anomaly is loss of adsorbed water in presoaked aggregate in fresh concrete [21].

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Journal of Engineering Sciences, Assiut University ...

The aim of this work is to improve the fresh and hardened concrete properties made from recycled concrete aggregate, by using a non-traditional admixture.As the previous researches concluded, using different ratios of recycled concrete aggregate has a harmful effect on the properties of fresh and hardened concrete.

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Quality Improvement of Recycled Aggregate Concrete ...

The developments of recycled aggregate concrete pressing hard in construction activities; however, the limitations on their applications had never being ended. The focus of this paper is: i) investigating the waste management strategy in construction; ii) proposing the two-stage mixing approach (TSMA) to improve the quality of RAC; and iii) experimenting the TSMA and assessing the benefits ...

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