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Improvement of recycled concrete aggregate properties

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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Improvement of Recycled Concrete Aggregate Properties

of aggregates. This paper reports an experimental study to improve the. properties of recycled concrete aggregates (RCA) by their. impregnation with

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Improvement of mechanical properties of recycled

Sep 01, 2017  The recycled aggregate derived from CDW of old concrete structures were provided by a local recycling aggregate manufacture plant and crushed by mobile machine. The properties and age of parent concrete of RA are unknown with about 5–10% the amount of impurities such as bricks, tiles, glass and ceramic.

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(PDF) Mechanical Properties of Recycled Aggregate ...

Nov 21, 2021  improvement in the mechanical properties of recycled aggregate concrete containing steel fibres by measuring the compressive, tensile and flexural strengths. To mitigate the weaker performance of ...

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Improvement of Recycled Aggregates Properties by Means of ...

Jul 16, 2021  Concrete from deconstruction can have a second life in the form of recycled concrete aggregates (RCAs). They unfortunately have poor properties (high porosity and water absorption coefficient (WAC)) with respect to natural aggregates. Accelerated carbonation was implemented to improve the RCA properties and to increase their use by storing carbon

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(PDF) Mechanical Properties of Recycled Aggregate ...

Nov 21, 2021  improvement in the mechanical properties of recycled aggregate concrete containing steel fibres by measuring the compressive, tensile and flexural strengths. To mitigate the weaker performance of ...

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THE IMPROVEMENT OF RECYCLED CONCRETE

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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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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Improving the mechanical properties of recycled concrete ...

Jun 01, 2017  This paper presents the results of a study that investigated the improvement of the mechanical properties of recycled concrete aggregate (RCA) produced by adding chopped basalt fibers (BF) with contents of 0.1%, 0.3%, 0.5%, 1%, and 1.5% by total volume of the mix to treated and untreated recycled aggregates.

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Quality Improvement Techniques for Recycled Concrete ...

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). These weak ...

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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 of the durability of concrete with recycled ...

Sep 30, 2014  Recycled aggregates concrete (RAC) becomes an important participant in recycled materials although there are still questionable properties of it, like chloride penetration and diffusion. An extensive experimental campaign was performed in order to evaluate the effect of recycled concrete aggregates (RCA) over some properties of concretes.

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Enhancement of recycled aggregate properties by ...

May 01, 2018  Strengthening the attached old cement mortar of recycled concrete aggregate (RCA) is a common approach to enhance the RCA properties. Accelerated CO 2 curing has been regarded as an alternative way to enhance the properties of RA. However, the improvement of the properties of RCA was limited by the shortage of reactive components in

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A review on recent developments in the recycled aggregate ...

Nov 01, 2021  Bui, T. Satomi, and H. Takahashi, “ Improvement of mechanical properties of recycled aggregate concrete basing on a new combination method between recycled aggregate and natural aggregate,” Constr. Build.

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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 are essential to the industrial implementation of the technology.

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Recycled Concrete Aggregate PDF Concrete ...

Procedure to produce recycled concrete aggregate. Recycled concrete aggregate was produced by crushing of ―old concrete cubes used for compressive strength testing and one precast reinforced concrete column, which had inappropriate dimensions (Figure 1). The strength class of old concrete cubes was C30/37 and the corresponding value of compressive strength

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Recycled Concrete Aggregates: A Review International ...

Mar 29, 2013  Improvement of tensile strength with the addition of RCA would usually be associated with an improved elasticity; however, because the “recycled aggregates are more prone to deformation than raw aggregates,” the weakness of the aggregate reduces the Young’s modulus for concrete when RCA is used (Exteberria et al. 2007). Generally, Young ...

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Study on the Durability Improvement of Nano-reinforced ...

Abstract: Recycled Aggregate Concrete(RAC)is new concrete prepared by recycling,crushing and grading of building waste concrete.Making full use of recycled aggregate can solve the environmental pollution and economic pressure caused by construction waste,and is also one of the main methods to slove the sustainable development of the

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(PDF) Mechanical Properties of Recycled Aggregate ...

Nov 21, 2021  improvement in the mechanical properties of recycled aggregate concrete containing steel fibres by measuring the compressive, tensile and flexural strengths. To mitigate the weaker performance of ...

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THE IMPROVEMENT OF RECYCLED CONCRETE

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.

Get PriceEmail Inquiry

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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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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Treatments for the Improvement of Recycled Aggregate ...

Nov 15, 2004  The old cement paste that remained on the natural aggregate was porous and cracked, leading to weak mechanical properties of the recycled aggregate. Treatment of the recycled aggregate by impregnation of silica fume solution and by ultrasonic cleaning was studied with the objective of overcoming the above-mentioned limitations.

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A review on recent developments in the recycled aggregate ...

Nov 01, 2021  Bui, T. Satomi, and H. Takahashi, “ Improvement of mechanical properties of recycled aggregate concrete basing on a new combination method between recycled aggregate and natural aggregate,” Constr. Build.

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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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Impact Properties of Recycled Aggregate Concrete with ...

Sep 02, 2020  The optimal soaking time and nanosilica concentration were chosen by the physical properties of the nanosilica-modified recycled aggregate. Recycled aggregate concrete (RAC) and nanosilica recycled aggregate concrete (SRAC) were fabricated by using ordinary recycled aggregate and nanosilica-modified recycled aggregate. Based on the

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Improvement of the durability of concrete with recycled ...

Sep 30, 2014  Recycled aggregates concrete (RAC) becomes an important participant in recycled materials although there are still questionable properties of it, like chloride penetration and diffusion. An extensive experimental campaign was performed in order to evaluate the effect of recycled concrete aggregates (RCA) over some properties of concretes.

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(PDF) Improvement of Bearing Capacity in Recycled ...

Dec 16, 2015  The properties of recycled concrete aggregates and mixed recycled aggregates suggest that these recycled materials can be used in unbound road layers to improve their mechanical behaviour in the ...

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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

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Recycled Concrete Aggregates: A Review International ...

Mar 29, 2013  Improvement of tensile strength with the addition of RCA would usually be associated with an improved elasticity; however, because the “recycled aggregates are more prone to deformation than raw aggregates,” the weakness of the aggregate reduces the Young’s modulus for concrete when RCA is used (Exteberria et al. 2007). Generally, Young ...

Get PriceEmail Inquiry

Study on the Durability Improvement of Nano-reinforced ...

Abstract: Recycled Aggregate Concrete(RAC)is new concrete prepared by recycling,crushing and grading of building waste concrete.Making full use of recycled aggregate can solve the environmental pollution and economic pressure caused by construction waste,and is also one of the main methods to slove the sustainable development of the

Get PriceEmail Inquiry

Recycled Concrete Aggregate PDF Concrete ...

Procedure to produce recycled concrete aggregate. Recycled concrete aggregate was produced by crushing of ―old concrete cubes used for compressive strength testing and one precast reinforced concrete column, which had inappropriate dimensions (Figure 1). The strength class of old concrete cubes was C30/37 and the corresponding value of compressive strength

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