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  • Recycled Aggregate Concrete: Applications, Advantages

    Reduces workability of concrete. Lack of specifications and guidelines. Less durability of RAC, however few papers have shown an improvement in the durability by mixing it with special materials like fly ash. Applications of Recycled Aggregate . Recycled Aggregate can be used in the following constructions. Can be used for constructing gutters, pavements etc. Large pieces of crushed aggregate

  • WORKABILITY STUDY FOR RECYCLED AGGREGATES

    WORKABILITY STUDY FOR RECYCLED AGGREGATES Parekh D. N.1 and Modhera C D. 2 1 Research Scholar, Applied Mechanics Department; SVNIT; 2 Professor; Applied Mechanics Department; SVNIT; Surat ABSTRACT: Significant quantities of waste are being produced and discarded by the construction and demolition (C & D) industries within the Asia and many other developed countries,

  • A STUDY ON RECYCLED CONCRETE AGGREGATES

    RCA. The recycled aggregate concrete is made by mixing 60% of recycled aggregates with 40% of crushed stone chips. The aggregates used for concrete batching are maintained at saturated surface dry condition . The workability of the recycled aggregate concrete is slightly lower than that of the conventional concrete. The

  • Properties of High-Workability Concrete with Recycled

    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 0–100% natural coarse aggregate (NCA) by weight. The slump and slump flow of fresh concretes were determined to ensure high workability. In

  • A Review Paper on use of Recycled Aggregates in Concrete

    Utilizing recycled aggregate is certainly an important step towards sustainable development in the concrete industry and management of construction waste. Recycled aggregate is variable properties. Quality of the recycled aggregate depends upon the collected material quality

  • Mechanical Properties Of Recycled Aggregates Concrete

    2.5 WORKABILITY STUDY FOR RECYCLED AGGREGATES Significant quantities of waste are being produced and discarded by the construction and demolition (C & D) industries within the Asia and many other developed countries, and this is likely to increase considerably in the future. On the other hand, in recent years the construction industry throughout the world has supported initiatives to improve sustain ability by increasing the use of recycled aggregates

  • (PDF) “Recycled Aggregate Concrete as Structural Material”

    06.01.2007· The utilisation of recycled aggregates is a good solution to the problem of an excess of waste material, provided that the desired final product quality is reached. The studies on the use of...

  • Crushed Concrete Aggregates Properties and Uses of

    Water absorption of recycled aggregate influence both fresh and hardened concrete properties. Recycled sand will be avoided, due to its absorption capacity, which would no doubt produce a shrinkage effect. Workability of recycled aggregate concretes is affected by the absorption capacity of the recycled aggregates.

  • PROPERTIES OF RECYCLED AGGREGATE CONCRETE

    It is known that the aggregates from domestic natural resources have negligible absorption, up to 1% as maximum, while the value of the classically recycled coarse aggregate typically ranges within the interval from 3.5% to 10%, and for the fine aggrega- te, within the interval from 5.5% to 13% [2,7].

  • Workability and Rheology of Fresh Recycled Aggregate

    Limited studies were focused on the influence of some recycled aggregate properties on slump, which is the most frequently used measure to evaluate workability. Since this measure is a single-value and it is often operator-sensitive, a more quantitative estimate can be derived in terms of fundamental physical quantities, such as plastic viscosity and yield stress. The higher heterogeneity in terms of

  • WORKABILITY STUDY FOR RECYCLED AGGREGATES

    WORKABILITY STUDY FOR RECYCLED AGGREGATES Parekh D. N.1 and Modhera C D. 2 1 Research Scholar, Applied Mechanics Department; SVNIT; 2 Professor; Applied Mechanics Department; SVNIT; Surat ABSTRACT: Significant quantities of waste are being produced and discarded by the construction and demolition (C & D) industries within the Asia and many other developed countries,

  • A Review Paper on use of Recycled Aggregates in Concrete

    aggregate can be used with recycle aggregate with a ratio of 80:20 and 70:30. Higher ratio of Recycle aggregate can worsen the properties and strength of mix and due to use of recycled aggregate in construction industry it can slow the impact of waste on environment. Also it will promote sustainable growth. The compressive strength and

  • 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 inaccessible or of inferior quality.

  • Properties of high-workability concrete with recycled

    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 0-100% natural coarse aggregate (NCA) by weight. The slump and slump flow of fresh concretes were determined to ensure high workability. In addition, the compressive, flexural and splitting tensile strengths, modulus

  • Recycled Concrete as Aggregate for Structural Concrete

    Recycled aggregate was made by crushing the waste concrete of laboratory test cubes and precast concrete columns. Three types of concrete mixtures were tested: concrete made entirely with natural aggregate (NAC) as a control concrete and two types of concrete made with natural fine and recycled coarse aggregate (50% and 100% replacement of coarse recycled aggregate). Ninety-nine

  • Workability study of concretes made with recycled mortar

    Abstract The use of recycled aggregates (RA) for concrete production usually involves a reduction of the workability as measured by slump. This reduction is mainly due to higher absorption rates, rough- textured surfaces and particles with quite irregular shape from RA.

  • PERFORMANCE OF RECYCLED AGGREGATE CONCRETE

    The workability loss, in terms of compacting factor, of both recycled and natural aggregate concrete mixes was measured up to 150 minutes after casting, at 30 minutes intervals. The relationship between workability loss and RCA content was found to be of uniform nature, with RCA concrete exhibiting lower loss compared to control concrete.

  • Fresh properties of recycled aggregate concrete

    10.02.2020· It has been reported that recycled aggregate concrete (RAC) is usually associated to a lower workability than natural aggregate concrete (NAC) of the same composition,. This is essentially attributed to the poor shape properties of crushed RA when compared to NA.

  • (PDF) “Recycled Aggregate Concrete as Structural

    The utilisation of recycled aggregates is a good solution to the problem of an excess of waste material, provided that the desired final product quality is reached. The studies on the use of...