A review of recycled aggregate in concrete

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A review of recycled aggregate in concrete

A Review Paper on use of Recycled Aggregates in Concrete - IJERT

Recycled Aggregate Concrete (RAC) is concrete that using Recycled Aggregate (RA) as partially or fully replacement in coarse and fine aggregate. It is believed.

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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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Recycled Concrete as Aggregate for Structural Concrete Production

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. Concrete made with such recycled concrete aggregate is called recycled aggregate concrete (RAC). The main purpose of this work is to determine

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Micro-structural analysis of recycled aggregate concrete produced

The Hong Kong SAR. Government has set up a recycling plant in Tuen Mun Area 38 aiming at turning concrete waste into recycled aggregate with a practice note ...

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Mix Design and Properties of Recycled Aggregate Concretes

26 Aug 2014 ... Such a modification may obviously affect the mechanical characteristics of recycled aggregates concrete. Several studies have investigated the ...

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Recycled Aggregates for Concrete: Problems and Possible

With crushed concrete aggregate the compressive strength and durability ... Nixon PJ published Recycled Concrete as an Aggregate for Concrete – A review [1].

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Application of Recycled Aggregate in Concrete: a Review

Syrian Pozzolan aggregate (PA) was used with recycled concrete (RCA) aggregates to manufacture concrete mixtures for use in a concrete mixes or in the outer cover of the buildings, as slabs of ...

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The Utilization of Recycled Aggregate in High Performance

The slump test is the common and practical workability test for fresh concrete and is performed in accordance with ASTM C143 . Fig. 1 shows the slump values for HPCs that are prepared with natural aggregate (b) and RA (c). The maximum detected slump value of HPC without RA was 185 mm .Previous studies, however, had demonstrated that completely replacing natural aggregate with RA might reduce ...

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A review of experimental results on structural performance

The results reported in this review clearly indicate that reinforced recycled aggregate concrete beams and columns with various recycled concrete aggregate replacement ratios have comparable or slightly lower structural performances to the reinforced natural aggregate concrete ones indicating the feasibility of recycled concrete aggregate for ...

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Recycled aggregate concrete (RAC) – comparative analysis of

Based on existing norms and specifications that allow the use of recycled aggregates in the production of concrete, a comparison is made of the parameters involved, such as density, water absorption and contaminants ratio within the recycled aggregates and maximum strength allowed for the recycled aggregate concrete, among others.

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