• Effect of recycled coarse aggregate and manufactured sand ...

    P. Mahakavi is a Research Scholar at the Department of Civil Engineering in Anna University, Chennai. In the last 4 years, his research has been focused on the development of structural concrete with waste materials such as foundry sand, Manufactured sand and Recycled Coarse aggregate in Self-Compacting Concrete.

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  • Sustainable Construction: Use of Recycled Concrete Aggregate

    Sustainable Construction: Use of Recycled Concrete Aggregate: Proceedings of the International Symposium organised by the Concrete Technology Unit, University of Dundee and held at the Department of Trade and Industry Conference Centre, London, UK on 11 – 12 November 1998. Authors: Ravindra K. Dhir, Neil A. Henderson and Mukesh C. Limbachiya.

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  • Durability Studies on the Recycled Aggregate Concrete in ...

     · Since China hosted the Olympic Games in 2008, a mass of construction and demolition (C&D) wastes were produced with the rapid urbanization construction. Recycling the C&D waste into recycled aggregates (RA) is an effective method for reducing the amount of C&D wastes. Many studies on the properties of RA and the durability of recycled aggregate concrete (RAC) were conducted in …

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  • Flexural Behavior of Reinforced Recycled Concrete Beams

    The properties of concrete with recycled aggregates, such as strength, Young''s modulus, shrinkage, creep and shrinkage-induced stress depending on the combination of natural and recycled aggregates, curing condition, and water to binder ratio, were discussed based on a comparison with the properties of concrete with aggregates.

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  • Microstructural characterization of concrete prepared with ...

    Several authors have reported the workability, mechanical properties, and durability of concrete produced with construction waste replacing the natural aggregate. However, a systematic microstructural characterization of recycled aggregate concrete has not been reported. This work studies the use of …

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  • Properties of concrete made with recycled coarse aggregate ...

     · Demolition of old buildings has produced a large amount of waste material. In this paper, experiments were performed to design the mix proportion of concrete made with recycled coarse aggregate from waste brick, and the workability, mechanical performance, and durability of the concrete with different contents of recycled coarse aggregate have also been investigated.

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  • The Effect of Recycled Aggregate Quality on Concrete ...

    Recycled aggregate was produced by crushing the waste concrete from buildings. Two types of concrete mixtures were tested namely concrete made fully using normal aggregate as a control concrete and another type of concrete made using recycled coarse aggregate (25, 50 and 75% coarse recycled aggregate replacement were used).

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  • Recycling of Brick Aggregate Concrete as Coarse Aggregate ...

     · Also, in-situ strength of an old structure has been compared with the compressive strength of recycled aggregate concrete made with the recycled aggregate collected from the same structure. Based on this investigation, it is revealed that recycled brick aggregate can be used as coarse aggregate for making concrete of strength 20.7 to 31.0 MPa.

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  • International Journal of Engineering Trends and …

    recycled aggregate to 80% recycled aggregate and with more percentage replacement of recycled aggregate used in the concrete specimen, the percentage of tensile strength remained are gradually decreasing. 3. Concrete made with recycled aggregate produced from construction and demolition waste has a compressive strength

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  • (PDF) IRJET

    The pressure at which water is recycled concrete as coarse aggregate for the production applied is 500 psi for about 15 to 20 min. washing process of concrete. It is required to verify whether the recycled cleans the aggregates to a considerable extent. The RCA concrete aggregate is acceptable or not.

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  • Special Issue "Advances in Recycled Aggregate Concrete"

    Accordingly, the primary performance of low-quality recycled aggregate concrete could be improved by varying the replacement ratio of the recycled aggregate and using appropriate mineral admixtures such as fly ash and ground granulated blast-furnace slag. The results show the potential for the use of low-quality aggregate in structural concrete.

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  • A STUDY ON RECYCLED CONCRETE AGGREGATES

    A STUDY ON RECYCLED CONCRETE AGGREGATES PAVAN P S 1, BABITHA RANI H,DEEPIKA GIRISH, RAGHAVENDRA K M 2, VINOD P N 1,DUSHYANTH.V.BABU.R,SHAIK NUMAN1 1Assistant Professor, Department of Civil Engineering, SET, Jain University. 2Student, Department of Civil Engineering, SET, Jain University. Abstract The amount of construction waste has been dramatically …

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  • Use of RECYCLED AGGREGATES In CONCRETE

    The fine aggregate used in the concrete, i.e. recycled and conventional is 100 percent natural. The recycled aggregate are collected from four sources all demolished structures. For both types of concrete i.e. M-20 and M-25, w/c ratio, maximum size of aggregate and …

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  • Effects of Recycled Aggregate on Concrete Mix and Exposure ...

     · In recent years, the amount of construction waste and recycled aggregate has been increasing every year in Korea. However, as the recycled aggregate is poor quality, it is not used for concrete, and the Korean government has strengthened the quality standards for recycled aggregate for concrete.

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  • Effect of recycled concrete aggregates on strength and ...

    The RCA sources included rejected precast concrete, construction demolition concrete, and returned ready-mixed concrete. The use of RCA did not have a significant effect on the rate of concrete compressive strength or stiffness gain. Furthermore, RCA resulted in an effect (decrease or increase) in the strand bond strength that was consistent ...

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  • Recycled Concrete Aggregate

    19.2.1 Recycled concrete aggregate (RCA) Coarse RCA complies to the requirements of maximum 5% masonry content, 5% fine materials, 0.5% lightweight material, 5% asphalt, 1% foreign material and 1% acid soluble sulfate, and is suitable for use in concrete as per BS 8500-2 (2006). In designated concrete RC20/25 to RC40/50, RCA can automatically ...

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  • Influence of Type and Replacement Level of Recycled ...

     · Title: Influence of Type and Replacement Level of Recycled Aggregates on Concrete Properties Author(s): Keun-Hyeok Yang, Heon-Soo Chung, and Ashraf F. Ashour Publication: Materials Journal Volume: 105 Issue: 3 Appears on pages(s): 289-296 Keywords: recycled aggregate; strength; water absorption Date: 5/1/2008 Abstract: Test results of nine recycled aggregate concretes and a control concrete ...

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  • Studies on Hemp and Recycled Aggregate Concrete ...

     · This paper reports on the first phase of a multi-phase research program conducted at the American University of Beirut (AUB) on "Hemp and Recycled Aggregates Concrete" (HRAC). HRAC is a new sustainable concrete material where hemp fibers are incorporated in the mix, the coarse aggregate content is reduced by 20% of the concrete volume, and 50% of the natural coarse aggregates …

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  • Effects of Recycled Aggregate on Concrete Mix and Exposure ...

     · The unit weight of the concrete ranged from 2365 to 2175 kg/m 3, depending on aggregate content (Figure 6) creasing the recycled aggregate content reduces the unit weight and density of the concrete, resulting in lighter concrete (Figure 6).The unit weights of the 15%, 20%, and 25% mixes were reduced by 8%, 11%, and 11.5%, respectively, compared to plain concrete.

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  • Strength and Durability Evaluation of Recycled Aggregate ...

     · Durability of recycled aggregate concrete designed with equivalent mortar volume method. Cement & Concrete Composites, 31(8), 555–563. Article Google Scholar Abdelfatah, A., Tabsh, S., & Yehia, S. (2011). Utlilization of recycled coarse aggregate in concrete mixes. Journal of Civil Engineering and Architecture, 5(6), 562–566.

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  • EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON ...

     · EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON PROPERTIES OF CONCRETE. a (Corresponding author), E-mail address: [email protected] . Journal of Green Building (2020) 15 (2): 57–69. Daniel Hatungimana, Şemsi Yazıcı, Ali Mardani-Aghabaglou; EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON PROPERTIES OF CONCRETE.

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  • The fibre reinforced concrete with using recycled aggregates

    aggregate produces acceptable quality concrete. Use of recycled fines, however, in a new mix requires close examination. Recycled fine aggregate is angular, with a high porosity and low specific gravity. The particles of crushed brick are generally more porous and have a lower density when compared to natural and recycled concrete aggregates ...

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  • Concept of Green Concrete Using Construction Demolished ...

    use of recycled aggregate concrete is studied. Recycled coarse aggregate (RCA) obtained from crushed concrete rubble and different demolished work. Instead of being stored, it can be reused in the building industry.Recycled aggregates are comprised of crushed, graded inorganic particles

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  • Studies on recycled aggregates-based concrete

     · The percentages of recycled concrete aggregates were varied and it was observed that properties such as compressive strength showed a decrease of up to 10% as the percentage of recycled concrete aggregates increased. Water absorption of recycled aggregates was found to be greater than natural aggregates, and this needs to be compensated during ...

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  • (PDF) Study on the use of Recycled Aggregate in concrete ...

    [Srivastava, 2(2): Feb., 2013] ISSN: 2277-9655 2277 IJESRT INTERNATIONAL JOURNA JOURNAL OF ENGINEERING SCIENCES ENCES & RESEARCH TECHNOLOGY Study on the use of Recycled Aggregate in concrete A. K. L. Srivastava Department of Civil Engineering, N. I. T. Jamshedpur, India [email protected] Abstract Recycling is the act of processing the used material for use in …

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  • Properties of recycled concrete aggregate under different ...

     · The coarse recycled concrete aggregate was obtained by crushing a laboratory produced primary concrete at age of 28 days.About 250 cubes of dimension 15 ∗ 15 ∗ 15 cm were crushed to produce the recycled coarse aggregates using mix design ().After crushing of these cubes, the maximum nominal size of recycled coarse aggregate used in mixes 2, 3 and 4 was 25 mm.

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  • Concrete Made for Energy Conservation Using Recycled ...

    In this study, recycled aggregates made from used tires from landfills were used as recycled material in concrete production. The shape, size and gradation of these recycled aggregates are designed for better bonding with the surrounding concrete paste. The new modified concrete showed real possibility of using recycled tires in concrete and ...

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  • Effect of recycled concrete aggregates on strength and ...

    aggregates, such as crushed limestone and gravel, while the demolition of old concrete structures offers significant sourc-es of recycled concrete aggregate (RCA). Currently, RCA use in the United States is largely limited to nonstructural applications, such as road base. Uncertainty and variability

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  • EFFECT OF DIFFERENT TYPES OF FIBER UTILIZATION ON ...

     · The use of recycled aggregate (RA) instead of natural aggregate (NA) in concrete is necessary for environmental protection and the effective utilization of resources. The addition of recycled aggregates in concrete increases shrinkage, porosity and decreases the mechanical properties compared to that of normal concrete.

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  • A Review Paper on use of Recycled Aggregates in Concrete ...

     · A. Recycled Aggregate Concrete. Recycling is the act of processing the used material for use in creating a new product. The usage of natural aggregate is getting more and more intense with the advanced development in infrastructure area. Recycled aggregate is comprised of crushed, graded inorganic particles processed.

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  • Indian Concrete Journal

    Detailed assessment of the technical properties of recycled aggregates from mixed C&D waste Christian J. Engelsen, Sandeep K. Malhotra, Gaurav Bhatiani, Kshemendra Nath P. View Abstract A study on the use of construction and demolition waste as coarse aggregate in self-compacting concrete for sustainability S. Girish, N. Ajay, Sasha Azimi View ...

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  • Recycled Concrete as a Source of Aggregate

    The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design ...

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  • Recycled Concrete as an Alternative Coarse Aggregate for ...

    The purpose of this study was to investigate whether demolished concrete can be used as an alternative for natural coarse aggregates in concrete. Specifically, this study wished to measure the strength of relationship between recycled concrete volume in concrete and its flexural strength. Also, this investigation determined whether there is a ...

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  • Comparative Tests of Beams and Columns Made of Recycled ...

    The tests concerning use of concrete with recycled aggregates (RAC) presented in different countries were focused on material properties. Very few serial tests were done on structural reinforced-concrete members with RAC to be compared with similar members with natural aggregate concrete (NAC).

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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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