recycled aggregate concrete journals

Research Article Towards Better Understanding of Concrete ...

coarse aggregates by recycled aggregates, and the concrete can be used for general concrete applications except in water retainingstructures. Japan issued three standards for recycled aggregate for concrete, JIS A , JIS A , and JIS A , for classes H, M, and L, respectively [ ]. ese classes can be used as follows: (a) class H in which no ...

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Study of the Mechanical Performance of a Recycled ...

The results obtained were compared with crushed aggregate concrete (CAC) ... of a Recycled Aggregate Concrete with Admixture Addition," Open Journal of ...

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Recycled concrete - Revista ALCONPAT

Journal of the Latin-American Association of Quality Control, Pathology and ... the elaboration of recycled concrete faces the search for optimal designs in order to ... aggregates and production on properties of recycled aggregate concrete”, ...

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Time-Dependent Behavior of Full-Scale Recycled Aggregate ...

Sixteen full-scale recycled aggregate concrete (RAC) beams were cast and tested to study their time-dependent behavior under long-term loading. The test parameters include the replacement rate of the recycled coarse aggregates (RCAs), the replacement rate of the recycled fine aggregates (RFAs), the concrete strength, and the stress ratio. The influence of the above variables on the deflection ...

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Suitability Investigation of Recycled Concrete Aggregates ...

W. Z. Taffese, "Effect of recycled coarse aggregate on concrete properties," in Proceedings of International Conference of Advances in Cement and Concrete Technology in Africa, pp. 1007-1014, BAM Federal Institute for Materials Research and Testing, Johannesburg, South Africa, January 2013.

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Critical Review of Recycled Aggregate Concrete Properties ...

Aug 18, 2020 — Journal of Materials in Civil Engineering ... Although the properties of recycled aggregate concrete are widely considered to be inferior to those ...

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MAKING CONCRETE FROM RECYCLED MATERIALS

aggregates in new concrete. The Issue Making concrete out of recycled concrete aggregate, or RCA, can be a sustainable and cost-saving alternative to other aggregates. However, the quality of concrete made with RCA is dependent on the quality of the recycled material used. OTREC researchers Jason

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Recycled Aggregate - an overview | ScienceDirect Topics

The use of recycled aggregate, in general terms, causes a reduction in concrete strength (Poon, Shui, Lam, Fok, & Kou, 2004) and elastic modulus, larger creep, and shrinkage deformations (Domingo-Cabo et al., 2009), as well as higher permeability of the concrete (Gómez-Soberón, 2002). In sum, concrete produced with RCA is generally of lower ...

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Review Article ASSESSMENT OF RECYCLED AGGREGATE …

established in 2005, is the standard for high – quality recycled aggregate (H) for concrete. JIS A 5023 has also been introduced as a standard for recycled concrete using low – quality recycled aggregate (L), as permitted for use in backfilling, filling and leveling concrete.

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International Journal of Concrete Technology

In this research, lower quality RA (<15 MPa) is utilized as recycled coarse aggregate (RCA1 and RCA2) and recycled fine aggregate (RFA) with 25, 25, and 50% replacement ratios, respectively, in concrete mixes. As a result, RCA2 with/without SF gives better performance than RCA1 and RFA if abrasion resistance is considered only.

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Mix Design and Properties of Recycled Aggregate Concretes ...

Aug 26, 2014 · The valorization of recycled aggregates in concrete is not recent and many studies have shown that material made with recycled aggregates may have mechanical properties similar to those of a conventional concrete mixed with natural aggregates (Etxeberria et al. 2007; Evangelista and de Brito 2007; Li 2008; McNeil and Kang 2013).

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Recycled Concrete Aggregate - an overview | ScienceDirect Topics

Recycled concrete aggregate (RCA) is the designation used in BS 8500-2 for recycled aggregate principally comprising crushed concrete. Designations of recycled aggregate other than RCA are of lower quality and may contain significant quantities of masonry which would preclude or limit their use in structural concrete.

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PERFORMANCE OF RECYCLED AGGREGATE CONCRETE

Aggregate (RA) on compressive strength of Recycled Aggregate Concrete (RAC) were ... Journal of Materials in Civil Engineering, September 2007. Lawson, N.

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Mechanical and Durability Properties of Recycled Aggregate ...

AbstractThe use of recycled concrete aggregates as an alternative aggregate material in concrete has been studied over the past two decades. It is now ...

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Recycled Concrete—A Source for New Aggregate

The recycled aggregate concrete showed somewhat better workability characteristics than conventional mixes although its modulus of elasticity and durability characteristics were lower. It is proposed that satisfactory concrete can be made by recycling concrete as aggregate where disposal problems exist or where natural aggregate is either ...

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EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON PROPERTIES ...

Jul 14, 2020 · The objective of this study is to investigate the effect of recycled concrete aggregate (RCA) quality on the properties of hardened concrete properties such as compressive strength, splitting tensile strength, density, water absorption capacity and porosity accessible to water.

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Recycled Concrete as an Alternative Coarse Aggregate for ...

Also, this investigation determined whether there is a significant difference in flexural strength between concrete with recycled concrete and that with gravel as coarse aggregates. Experimental design was the method implemented and this involved four sets of different mixtures with three samples for each mixture.

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Use of Recycled Aggregate Concrete - IOSR Journal

This paper reports the basic properties of recycled fine aggregate and recycled coarse aggregate & also compares these properties with natural aggregates. Basic ...

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Resistance of Recycled Aggregate Concrete (RAC) Subjected ...

The 7-day compressive strength was decreased by 26.7% and 44.4% owing to replacement of natural coarse aggregate by 75% and 100% recycled aggregate, respectively. The effect of recycled aggregate on compressive strength was less significant at age of 28 days than that at 7 days. ‎Abstract · ‎Introduction · ‎Results and Discussion · ‎Conclusions

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Microstructure of Concrete with Aggregates from Construction ...

This paper intends to analyze the microstructure of concrete with recycled aggregates (RA) from construction and demolition waste from various Portuguese recycling plants. To that effect, several scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) analyses were performed.

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