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  Strength and Durability Properties of Treated Recycled

  The use of recycled aggregate RA generated from construction and demolition C&D waste to produce new concrete would minimize the need for the use of natural aggregate NA The authors propose a new hybrid method in the present work by combining presoaking in mild acetic acid followed by mechanical grinding to produce high quality RA

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  Identification of frost susceptible recycled concrete

  — Research highlights This study aims to develop an effective frost soundness test method for unbound recycled concrete aggregates The proposed method sharply distinguishes the durable and non durable recycled concrete aggregates A pre drying process at 50 °C is more relevant to the cement bonded recycled aggregates The sulfate

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  Analysis and optimization of mechanical properties of recycled concrete

  The most significant difference between recycled and natural concretes lies in aggregates The performance of recycled coarse aggregates directly affects the characteristics of recycled concrete Therefore an in depth study of aggregate characteristics is of great significance for improving the quality of recycled concrete Based on the coarse

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  Mechanical properties of compound concrete containing demolished

  — The frost resistance of the compound concrete made of fresh concrete FC and demolished concrete lumps DCLs distinctly larger than conventional recycled aggregates was tested in the laboratory

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  PDF Recycling of Construction and Demolition Concrete

  — These include an optimum water absorption not greater than 3% an aggregate relative density of % or more and optimum mortar content of not greater than 50% Butler et al [50] as cited by

  Toward the Development of Sustainable Concretes with Recycled Concrete

  — Recycled aggregate concrete RAC an ecofriendly concrete produced by partial or full substitution of natural aggregates with recycled concrete aggregates in a concrete mix has drawn much attention recently Over the last decade a significant volume of studies has been reported in the literature on the behavior of RACs

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  Shape effect on compressive mechanical properties of compound concrete

  — In order to lessen that difficulty the authors proposed a more eco friendly method for recycling waste concrete [33] That method requires only that waste concrete be coarsely crushed into large lumps referred as demolished concrete lumps or DCLs for direct mixing with new concrete referred as fresh concrete FC during casting

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  Improvement of the Mechanical Behavior of an

  — 3 Materials and its Cement Ordinary Portland Cement OPC of Grade 53 conforming to IS 12269 1987 [19] was used to prepare the physical characteristics and mineralogical composition of the OPC were measured using the procedure prescribed in the IS 12269 1987 [19] and IS 4031 1988 [20]

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  PDF Guidelines for Civil Structures Demolition Method Selection

  — This paper investigates on mechanical properties of GGBS concrete under immersed curing and membrane curing methods M30 Grade concrete Air tight polyethylene covers are used for membrane curing

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  Review Mechanical behavior and modeling of grinding force

  — Section 3 is the introduction of the constitutive model which organizes and summarizes the constitutive parameters of different materials followed by describing the removal mechanism and the constitutive modes adopted for typical workpiece materials Section 4 summarizes the behavioral change phenomenon and grindability considering

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  On relationships between the mechanical properties of

  — In this paper a detailed investigation is conducted to analyze the relationships between the mechanical properties of recycled aggregate concrete RAC Based on a large number of experimental results published worldwide in literature from 1985 to 2004 an experimental database is developed with regard to the main mechanical

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  sbm/sbm demolished concrete crusher unit in at

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  Shape effect on compressive mechanical properties of compound concrete

  — DOI / Corpus ID 139174695; Shape effect on compressive mechanical properties of compound concrete containing demolished concrete lumps article{Wu2018ShapeEO title={Shape effect on compressive mechanical properties of compound concrete containing demolished concrete lumps} author={Bo Wu

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  Compressive behavior of compound concrete containing demolished

  — In RAC recycled coarse aggregates RAs produced by crushing the demolished concrete is utilized to partly or entirely replace natural coarse aggregates NAs as shown in Fig 1 [8] [9] RAC has been systematically and comprehensively investigated since it was first introduced 70 years ago resulting in a consensus that the porous mortar

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  SUSTAINABLE CONCRETE WASTE RECYCLING

  1 SUSTAINABLE CONCRETE WASTE RECYCLING Engineering Developments on Appropriate Use of Recycled Aggregate for Concrete Yasuhiro Dosho1 and Yuichi Mura2 1 Department of Environmental Science and Technology Meijo University Japan 2 Architectural & Structural Engineering Center Tokyo Electric Power Service Co Ltd

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  PDF A review on concrete recycling ResearchGate

  — Recycled concrete when appropriately processed and mixed can exhibit similar structural properties to conventional concrete making it a viable option for retrofitting projects

  Improvement of the Mechanical Behavior of an

  — 3 Materials and its Cement Ordinary Portland Cement OPC of Grade 53 conforming to IS 12269 1987 [19] was used to prepare the physical characteristics and mineralogical composition of the OPC were measured using the procedure prescribed in the IS 12269 1987 [19] and IS 4031 1988 [20]

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  Demolishing of concrete structures PPT

  This method statement defines the sequence and the control procedures for the repair of concrete defects which include but are not limited to the following 1 Concrete Cracking Non structural and Structural Cracks 2 Honeycombing or Spalling 3 Pinholes and Blowholes 4 Form Tie Rod/Bolt Holes Cone Holes and Voids 5 Removal and Repair of

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  Mechanical properties of compound concrete containing demolished

  — The test results show that when the compressive strength of the demolished concrete is close to that of FC a linear formula can predict the compressive strength of the compound concrete and the mechanical properties and seismic performance of structural members made from DCLs and FC are almost the same as those of

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  Constructing a Sustainable Roller Compacted Concrete

  — Roller Compacted Concrete is a type of concrete that is environmentally friendly and more economical than traditional concrete Roller Compacted Concrete is typically used for heavy duty and

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  Mechanical properties of compound concrete containing demolished

  — DOI / Corpus ID 136406040; Mechanical properties of compound concrete containing demolished concrete lumps after freeze thaw cycles article{Wu2017MechanicalPO title={Mechanical properties of compound concrete containing demolished concrete lumps after freeze thaw cycles}

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  Strength and Durability Properties of Treated Recycled

  The use of recycled aggregate RA generated from construction and demolition C&D waste to produce new concrete would minimize the need for the use of natural aggregate NA The authors propose a new hybrid method in the present work by combining presoaking in mild acetic acid followed by mechanical grinding to produce high quality RA

  Mechanical performance and environmental impacts of self

  — Many researchers have studied the resultant physical and mechanical properties of concrete made with RCAs In a continued effort of material recycling this study explored the feasibility of using demolished concrete blocks DCBs in the production of concrete Compared to conventional RCA DCB is characterized by its relatively large size

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  Performance and Properties of Structural Concrete made

  — Demolished concrete is collected from the Nawabshah city and processed to maximum of 1" size and mechanical grinding are considered for analyzing their effectiveness in improving RCA

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  Sustainable building materials recycled aggregate and concrete…

  — Resource utilization of construction and demolition C&D waste has great potential to significantly reduce the consumption of natural resources and improve the environment Meanwhile establishing a sound policy system and reducing production are the key ways to solve the problem of C&D waste Numerous studies on C&D waste

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  CO2 mineralization of demolished concrete wastes into a

  2 mineralization of demolished concrete wastes into techniques and methods to separate out the cement paste fines Full concrete recycling will further improve concrete s circul ar utilization by using recycled aggregates instead of natural deposits of aggregates Although the feasibility of the process has already been demonstrated at

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  Investigation of using hybrid recycled powder from demolished concrete

  — Similar to recycled clay brick powder recycled concrete powder can also be used as a supplement in concrete because of its pozzolanic property Both Chen et al [19] and Sun et al [20] studied the recycled micro powder collected from the dust collection systems used for recycling demolished concrete solids