Workability Of Recycled Concrete Aggregate

  • Recycled aggregate concrete as structural material

    recycled aggregate concrete as a test element, and ... workability of the recycled aggregate concrete. Fig. 1 Recycled coarse aggregate composition 530 …

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  • Recycled Aggregates - Portland Cement Association

    Abstract and Figures This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA …

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  • PROPERTIES OF RECYCLED AGGREGATE CONCRETE

    application of coarse recycled concrete aggregate, as the component materials in the con- crete mixtures, it is possible to produce structural concrete that can be satisfactory and even with high quality, which primarily depends on the characteristics of crushed demolished

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  • Recycled Concrete: The Pros and Cons - Braen Stone

    Buying Recycled Concrete Aggregate in NJ. Braen Stone is the leading manufacturer and supplier of a wide range of construction materials for sale throughout NJ and its neighboring areas. In addition to harvesting and producing materials, we also operate our own local concrete recycling plant.

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  • Crushed Returned Concrete as Aggregates for New Concrete

    One study found that in order to produce similar workability as VA concrete 5% more mixing water was required when using just the coarse fraction of recycled concrete aggregates (coarse RCA) and up to 15% more mixing water when using both the coarse and fine fractions of RCA8-11. Issues of

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  • (DOC) AN INTRODUCTION TO RECYCLED AGGREGATE CONCRETE ...

    AN INTRODUCTION TO RECYCLED AGGREGATE CONCRETE: PRODUCTION AND APPLICATIONS Piyush Sharma Department of Civil Engineering, Amity School of Engineering & Technology Amity University, Haryana, India Email: [email protected] ABSTRACT To obtain good quality concrete using recycled aggregate it is necessary to follow the minimum …

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  • Properties of High-Workability Concrete with Recycled ...

    *e-mail: [email protected] Properties of High-Workability Concrete with Recycled Concrete Aggregate Md. Safiuddina*, Ubagaram Johnson Alengaramb, Md. Abdus Salamb, Mohd Zamin Jumaat b, Fahrol Fadhli Jaafar , Hawa Binti Saadb aDepartment of Civil and Environmental Engineering, Faculty of Engineering, University of Waterloo, 200 University Avenue West, Waterloo, …

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  • Workability Retention and Strength Development of Self ...

    Oct 04, 2019· This paper presents the results on workability testing as well as strength testing of self-compacting concrete containing partial/full coarse recycled concrete aggregates and ternary blended cement using ultrafine recycled powder (RP) and silica fume (SF).

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  • Mechanical Properties Of Recycled Aggregates Concrete

    the workability is defined as “the composite property of fresh concrete involving ease of placing and resistance to segregation is called workability “ .the proportions and properties of water ,cement, aggregates, admixtures and other replaced materials affect the workability of concrete .various concreting operations ,if properly done ...

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  • What is Workability of Concrete? - Gilson Co.

    Crushed aggregate with the proper proportions provides a better bond with the cement matrix and adequate workability. Admixtures: Many types of admixtures alter the workability of fresh concrete, either by design or as a side-effect. Surfactants such as superplasticizers reduce attraction between cement and aggregate particles, allowing mixes ...

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  • Workability study of concretes made with recycled mortar ...

    Higher water absorption of recycled concrete, in comparison with natural aggregate, is another factor that affects workability. In general, recycled mixtures willshowadecreaseofthe amountoffreewater [7,22, 29, 37]. Thus, to enhance the same workability, some researchers found that recycled concrete …

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  • Recycled Aggregates.ppt | Construction Aggregate | Concrete

    Workability (CF) 0.9 30 ... Compressive strength of recycled aggregates concrete will be 70% to 80% of conventional concrete and it is lower as 8Mpa with same water/cement ratio as conventional concrete. Currently the major uses of crushed concrete material are in

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  • Aggregate in Concrete - The Concrete Network

    Recycled concrete will have a higher absorption and lower specific gravity than conventional aggregates. To produce good quality, durable concrete containing a portion of recycled concrete aggregate often requires trial concrete mixes and close monitoring of the properties of the old recycled concrete, with mix adjustments made, as needed.

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  • Experimental Study on High Strength Concrete with Recycled ...

    recycled aggregate concrete have been reported by many researchers, but higher grade activities are seldom reported, because of its personal property on workability, strength and durability. The scope of this project is to decide and to examine the high strength concrete by using different percentage of ...

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  • Mechanical and durability properties of recycled aggregate ...

    The experiment used local tap water as the mixing water. In addition, super plasticizer (SP) type G was added to achieve desired workability in the RAC samples. All of the raw materials used in this study met relevant ASTM standards. The aggregates were a combination of natural aggregate and recycled concrete aggregate obtained from CDW.

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  • Recycled Aggregate Concrete: Applications, Advantages ...

    Advantages of Recycled Aggregate Reduces the amount of aggregates to be created, hence less evacuation of natural resources. While being crushed into smaller particles a large amount of carbon dioxide is absorbed. This reduces the amount of CO 2 is the atmosphere.

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  • Study of Partial Replacement of Natural Aggregate by ...

    against natural aggregate concrete is performed according to requirements as such for its workability, compressive strength test and also tensile strength test. The results show that up to 30% replacements of natural aggregate with recycled aggregate have the same strength as conventional concrete. Beyond 30% replacements

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  • Recycled Concrete Aggregates: Its Properties & Uses

    Recycled concrete aggregate as such, holds original aggregate with hydrated cement paste. Hence first, that demolished concrete is cleaned from dirt and other loose particles. After that, it is broken into smaller pieces to produce aggregate known as recycled concrete aggregate. Recycled concrete aggregates are available in size of 20mm to 50mm.

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  • Properties of high-workability concrete with recycled ...

    ABSTRACT. This study presents the effects of recycled concrete aggregate (RCA) on the key fresh and hardened properties of concrete. RCA was used to produce high-workability concrete substituting 0- natural coarse aggregate (NCA) by weight.

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  • Concrete Based on Recycled Aggregates for Their Use in ...

    The outcome of the study shows that the recycled aggregates are more heterogeneous and have a high capacity of water absorption, but which still respects the current standards of concrete. The need for additional water has been observed for recycled aggregates-based concrete so as to have the same workability.

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  • Strength and Durability Evaluation of Recycled Aggregate ...

    May 14, 2015· 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 that contribute to the strength and durability of concrete.

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  • Investigation on Fresh Properties of Concrete Made with ...

    of mixed recycled aggregate in primary concrete structures. Zhang and Zong.(2013) performed experiments to design mix proportions of concrete made with recycled coarse aggregate from waste brick, and the workability, mechanical performance, and

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  • Mechanical Properties Of Recycled Aggregates Concrete

    Concrete is such a costly material but Now a day’s waste concrete is only being used as a landfill material instead of recycling the concrete as a recycled concrete aggregate (RCA) to use for the construction purposes. Therefore concrete will continue to be the construction material in the foreseeable.

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  • Rheological and Mechanical Behavior of Concrete Mixtures ...

    This paper investigates the workability, compressive strength, and elastic modulus of normal strength concrete mixtures that use recycled concrete aggregates (RCA) as replacement for coarse natural aggregates. To provide a regional geographical representation of the variability in material quality and properties, a total of 144 mixtures ...

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  • Aggregates - Portland Cement Association

    Crushed aggregate is produced by crushing quarry rock, boulders, cobbles, or large-size gravel. Recycled concrete is a viable source of aggregate and has been satisfactorily used in granular subbases, soil-cement, and in new concrete. After harvesting, aggregate is processed: crushed, screened, and washed to obtain proper cleanliness and gradation.

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  • The Use of Recycled Concrete Aggregates (RCA) for ...

    Because recycled aggregate contains mortar from the original concrete, it is more porous and absorptive than many natural aggregates. Recycled aggregate had water absorption of 9.6%. The workability of concrete, as the amount of recycled aggregate was increased, the concrete required more water to maintain adequate

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  • Recycled Concrete Aggregates: A Review | International ...

    Mar 29, 2013· After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1).This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that is created after the mortar is separated from the …

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  • Aggregates for Concrete as per American Standards - ASTM [PDF]

    The aggregates used in the production of concrete are inert granular materials such as gravel, crushed stone, sand, slag, recycled concrete, and geosynthetic aggregates. The aggregates may be natural, manufactured, or recycled. The aggregates are broadly classified into two types based on the size, namely- fine aggregate and coarse aggregate. In this article, we discuss […]

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  • Durability And Performance Characteristics Of Recycled ...

    characteristics of fresh and hardened recycled aggregate concrete and natural aggregate concrete is relatively narrower han reported for laboratoryt -crushed recycled aggregate concrete mixes. For concrete without blast furnace slag, having similar volumetric mix proportions and workability,

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  • Mechanical and durability properties of recycled aggregate ...

    On the other hand, using CDW as a recycled fine aggregate significantly influenced concrete strength and durability. The full replacement of NFA with RFA greatly increased the water absorption of concrete mixtures to, as much as, 46% of the level absorbed by NFA [ 14, 15 ].

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