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Durability of recycled aggregate concrete | Request PDF

This paper presents the main results of the research carried out to analyse the physical, mechanical and durability properties of concrete incorporating recycled aggregate.

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Recycled Concrete as Aggregate for Structural Concrete ...

Recycled concrete aggregate (RCA) is generally produced by two-stage crushing of demolished concrete, and screening and removal of contaminants such as …

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Towards Sustainable Self-Compacting Concrete: Effect of ...

These wastes can be recycled and replace natural aggregates resulting in sustainable green concrete. In this research, natural aggregates in self-compacting concrete (SCC) are replaced, wholly or partly, by steel slag coarse aggregates that were produced by …

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Elasticity and Drying Shrinkage Concrete of Recycled-Aggregate

The static and dynamic mod&i of elasticity and drying shrinkage of recycled-aggregate concretes made with coarse recycled aggregate and natural sand were studied as functions of modulus of elasticity and drying shrinkage of the original concretes from which the recycled aggregates …

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Research Article CHARACTERIZATION OF RECYCLED …

of use of recycled aggregate concrete in pavement construction, with technical proofs are explained here in detail. Individual performance of recycled fine aggregate in concrete, use of silica fumes in recycled aggregate concrete, use of fly ash in recycled aggregate concrete etc are shown with experimental reasons.

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Enhancing mechanical properties of concrete prepared with ...

The recycling of concrete is an important means to a sustainable material flow. The limited reuse of recycled aggregates is due to the lower quality of concrete production. Various methods have been attempted to minimise the negative effect.

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Use of RECYCLED AGGREGATES In CONCRETE- A Paradigm Shift

The use of recycled aggregates in concrete prove to be a valuable building materials in technical, environment and economical respect Recycled aggregate posses relatively lower bulk density, crushing and impact values and higher water absorption as compared to natural aggregate.

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Mix Design for Pervious Recycled Aggregate Concrete ...

Permeability of pervious concrete is influenced by the porosity and the use of recycled concrete aggregate had 3.7 Mix Design for Pervious Concrete no significant effect on the permeability of pervious Figure 11 shows the relationships among porosity, concrete. strength and permeability for pervious concrete, developed 5.

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High-Strength Structural Concrete with Recycled Aggregates

concrete with recycled aggregates, as an alternative material to coarse aggregate in structural concrete. The capacity of this project is to decide and balance the ... ment of Recycled Aggregate” Journal of materials in civil engineering November - December 2004. 4.“Lightweight Concrete Masonry with Recycled Wood

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Recycling of Brick Aggregate Concrete as Coarse Aggregate ...

For the same mix design, the recycled aggregate concrete produces almost similar strength compared with the first class brick aggregate concrete commonly used in Bangladesh. However, relatively better performance of recycled aggregate concrete is found for W/C = 0.45.

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RECYCLED AGGREGATE CONCRETE EXPOSED TO ... - ARPN …

Concrete using recycled coarse aggregate from waste concrete is now a popular subject of research. Green concept of construction leads the construction industry to use the materials of low embodied energy and also the materials which reduces the destabilization of environment. Recycled aggregate satisfies both the requirement. Some research ...

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Structural Concrete Prepared with Coarse Recycled Concrete ...

An investigation of mechanical behaviour and elastic properties of recycled aggregate concrete (RAC) is presented. RACs were prepared by using a coarse aggregate fraction made of recycled concrete coming from a recycling plant in which rubble from concrete structure demolition is …

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“Recycled Coarse Aggregates” RECYCLED COARSE ... - IOAJ

is used for preparing fresh concrete. The amount of recycled coarse aggregate used in this research is approximately 125 kg. Many researchers state that recycled aggregates are only suitable for non-structural concrete application. This research, however, shows that the recycled aggregates that are obtained from concrete specimen make good ...

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Special Issue "New Trends in Recycled Aggregate Concrete"

It has been proved that artificial neural networks (ANN) can be used to predict the compressive strength and elastic modulus of recycled aggregate concrete (RAC) made with recycled aggregates from different sources. This paper is a further study of the use of ANN

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Mix Design for Pervious Recycled Aggregate Concrete ...

Permeability of pervious concrete is influenced by the porosity and the use of recycled concrete aggregate had 3.7 Mix Design for Pervious Concrete no significant effect on the permeability of pervious Figure 11 shows the relationships among porosity, concrete. strength and permeability for pervious concrete, developed 5.

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International Research Journal of Engineering and ...

concrete. Many researchers state that recycled aggregates are only suitable for non-structural concrete application. This study shows that the recycled aggregates that are obtained from concrete specimen make good quality concrete. The slump of recycled aggregate concrete is more than the normal concrete.

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Recycled Aggregate Self-curing High-strength Concrete ...

High strength concrete as a special concrete type has a high strength with extra properties compared to conventional concrete. In this research, the combination of previous three concrete types to obtain self-curing high-strength concrete cast using coarse recycled aggregates is studied.

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Behaviour of Recycled Aggregate Concrete on exposed to ...

recycled aggregate concrete. The results indicate that concrete with aggregate partially replaced with RCA exhibits good performance under elevated temperatures and it can be considered comparable to conventional concrete. Keywords: Recycled aggregates, elevated temperature, compressive strength, split tensile

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Recycled Plastics as Coarse Aggregate for Structural ...

The suitability of recycled plastics as coarse aggregate in concrete and its advantages are discussed here. The initial questions arising of the bond strength and the heat of hydration regarding plastic aggregate were solved.

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Use of recycled concrete aggregate in concrete: a review ...

The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for aggregate. In addition, the use of RCA leads to a possible solution to the environmental problem ...

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Effect of Recycled Coarse Aggregate on Concrete Properties ...

Abstract. This research was conducted with the use of recycled aggregate as modification. In terms of the use of recycled aggregate, the percentage of recycled aggregate should be determined because the strength of concrete would not be obtained by the high percentage of recycled aggregate.The scope of study is about comparison between recycle coarse aggregate and natural aggregate in …

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Influence of Recycled Concrete Aggregates on Strength ...

recycled aggregate in the concrete mix , the compressive strength decreases. However, there is not so much difference between the compressive strength of normal concrete and 25% recycled aggregate concrete. Fig 2 shows the 28 days compressive strength of concrete with percentage of recycled aggregate concrete.

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Mix Design for Pervious Recycled Aggregate Concrete ...

The specific gravity of the natural aggregate was 2.65 and that for recycled concrete aggregate was 2.19 and 2.04 for 20 and 13 mm maximum size recycled concrete aggregate, respectively. The water absorption for 20 and 13 mm recycled concrete aggregates was 5.3 and 8.2 %, respectively, compared to 1.0 % for the natural aggregate.

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Enhancing mechanical properties of concrete prepared with ...

The recycling of concrete is an important means to a sustainable material flow. The limited reuse of recycled aggregates is due to the lower quality of concrete production. Various methods have been attempted to minimise the negative effect.

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EXPERIMENTAL INVESTIGATIONS OF COARSE AGGREGATE …

to conserve the natural resources. When recycled coarse aggregate is used in structural concrete, the assessment of physical, mechanical and durable characteristics of recycled coarse aggregate is very important. The physical and mechanical properties of concrete with the recycled coarse aggregate …

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Efficient Utilization of Recycled Concrete Aggregate in ...

In Singapore, the applications of recycled concrete aggregate (RCA) are limited to nonstructural concrete, road construction, and backfilling. To realize the beneficial use of RCA, an in-depth study was conducted to evaluate its use in structural concrete.

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Use of Recycled Concrete - Scholarlink Research

in recycle aggregate content. The recycled coarse aggregates (RCA) had little influence on the hardened density of concrete and an increase in recycled aggregate content led to a decrease in bleeding capacity. The main drawback of the RCA was the high permeability of the recycled aggregate concrete. The research concludes that

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EFFECT OF TEMPERATURE ON RECYCLED AGGREGATE …

recycled aggregates to make new concrete (RAC) which is not yet very common in the Nigerian Construction Industry, is obviously one of the tools that will check the escalation in prices of natural aggregates. The use of recycled aggregate in replacing natural aggregate in concrete construction has become popular among researchers.

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Recycled Plastics as Coarse Aggregate for Structural ...

The suitability of recycled plastics as coarse aggregate in concrete and its advantages are discussed here. The initial questions arising of the bond strength and the heat of hydration regarding plastic aggregate were solved.

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Recycled Concrete Aggregates: A Review | International ...

RILEM : Type 1 aggregates from masonry rubble, Type 2 aggregates from concrete rubble; Type 3 mixture of natural (min 80 %) and recycled (max 20 %) aggregate. 2.2 Shape and Gradation The shape of the aggregate pieces is influential on the workability of the concrete.

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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. Most agencies specify using the material directly in the project that is being reconstructed. Recycling of concrete is a relatively simple process.

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Review Article ASSESSMENT OF RECYCLED AGGREGATE …

Journal of Engineering Research and Studies E-ISSN 7916 JERS/Vol.II/ Issue I/January-March 2011/ 9 Review Article ASSESSMENT OF RECYCLED AGGREGATE CONCRETE Parekh D. N.1 and Dr. Modhera C. D.2 Address for Correspondence 1Research Scholar; ... Similarly the properties of recycled aggregate concrete were also determined and explained here.

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Research Paper Recycling Of Concrete ... - Quest Journals

concrete, but that recycled concrete may be expected to have lower strength than concrete made with similar aggregate not previously used. Okafor (2010) indicated that recycled aggregate can be used to produce quality concrete which meets the required strength of a concrete. According to Okafor, concrete is much higher in strength than ...

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Evaluation of Marshall Compactor Effect on the Degradation ...

 · This study evaluated the suitability of variously proportioned and graded mixtures of conventional aggregates and Recycled Concrete Aggregate (RCA); six different proportions (0%, 20%, 40%, 60%, 80% and ) and five grades of crushed cement concrete were assessed using a 5 mm aggregate passing sieve and a 1.18 mm retaining sieve.

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Efficient Utilization of Recycled Concrete Aggregate in ...

In Singapore, the applications of recycled concrete aggregate (RCA) are limited to nonstructural concrete, road construction, and backfilling. To realize the beneficial use of RCA, an in-depth study was conducted to evaluate its use in structural concrete.

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Strength and Durability Evaluation of Recycled Aggregate ...

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 ...

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Experimental Study on Performance of Recycled Concrete ...

introduce recycled aggregates from construction and demolition debris and rubble into the production processes. This increases the life cycle of these materials, thereby reducing the amount of waste dumping and natural resource extraction. 1.2 ADVANTAGES OF RECYCLED CONCRETE AGGREGATE There are many advantages through using the recycled aggregate.

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MECHANICAL PROPERTIES OF RECYCLED AGGREGATE …

recycled aggregate was used, the compressive strengths concrete were reduced by about 30.9%. According to ACI 318/2014 [12] all recycled aggregate concrete mixes can be used for structural concrete. The Ratio between cylinder strength to cube strength decreased by 11 % with increasing recycled aggregate percentage from 0 to ,.

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Use of Recycled Concrete Aggregate in PCCP ... - …

Properties and Characteristics of Recycled Concrete Aggregate A concrete pavement’s strength and performance is very dependent on the aggregates used to produce the concrete. Recycled concrete aggregates are different in many ways from aggregates as shown in Table 1. Table 1. Comparison of typical aggregate and recycled concrete ...

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(PDF) Use of recycled concrete aggregate in concrete: A review

The use of recycled concrete aggregate (RCA) in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry, as it reduces the demand for ...

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