characteristics of recycled concrete

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Bond characteristics of concrete made of recycled ...

This paper presents the experimental results of pullout tests conducted to determine the bond characteristics of concrete using aggregates made from the recycling of concrete waste from demolished buildings.

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Effects of Recycled Aggregate Characteristics on ...

This study points out the close relationship between several quality indicators of recycled aggregate and the performance of recycled aggregate concrete. Regarding the diversity in quality and composition of the recycled concrete products, three laboratory produced airentrainedconcretes with low, medium and high watercement ratios and a nonairentrained concrete with medium W/C were processed for .

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Recycled Concrete Aggregates: A Review | SpringerLink

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 rock .

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characteristics of recycled concrete

Strength and Deformation Characteristics of Recycled . To investigate the feasibility of the use of recycled concrete aggregate as the backfill material of geotechnical engineering structures, such as embankments, geosynthetic reinforced soil retaining walls and bridge abutments, a series of drained triaxial compression tests were performed.

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Concrete recycling Wikipedia

When structures made of concrete are demolished or renovated, concrete recycling is an increasingly common method of utilizing the rubble. Concrete was once routinely trucked to landfills for disposal, but recycling has a number of benefits that have made it a more attractive option in this age of greater environmental awareness, more environmental laws, and the desire to keep construction ...

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Fracture process zone characteristics and identification ...

Normal and recycled aggregate concrete differ significantly in their fracture characteristics. The cracking in recycled concrete initiates earlier; the fracture length is generally larger and the use of high proportion of recycled aggregate results in higher strain gradients in the fracture process zone.

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Strength characteristics of recycled concrete aggregate ...

So the strength of concrete made, recycled concrete aggregates is enhanced by the addition of some additives. In this study steel fibers are added in concrete with recycled concrete to increase the workability of the concrete at the same watercement ratio, in addition, to increase in compressive, tensile flexural strength of the concrete.

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Use of recycled aggregates in road subbase construction ...

The aggregates are recycled from the demolition waste of a building and in particular from basalt, sandstone, structural concrete and vibrated concrete blocks. The main physical characteristics of recycled aggregates for road applications and the performance of road subbase layers containing recycled components are determined and validated on ...

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Construction and Demolition Waste Used as Recycled ...

Construction and Demolition Waste Used as Recycled Aggregates in Concrete: ... Characteristics of RA and Recycled Brick Masonry Aggregates Produced from Idl ild El t S h l D liti R bblIdlewild Elementary School Demolition Rubble Characteristic Recycled Concrete Aggregate Recycled Brick Masonry Aggregate BlkBulk DitDensity 1 281 975 5 (ASTM C29 ...

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Mechanical Properties Of Recycled Aggregates Concrete

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 replacement of coarse recycled aggregate).

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On statistical characteristics of the compressive strength ...

On statistical characteristics of the compressive strength of recycled aggregate concrete Article (PDF Available) in Structural Concrete 6(4):149153 · January 2005 with 470 Reads

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Effects of Recycled Tires Rubber Aggregates on the ...

Effects of Recycled Tires Rubber Aggregates on the Characteristics of Cement Concrete . Zeineddine Boudaoud. 1,2, Miloud Beddar. 1. 1. Laboratory of Materials, Department of Civil Engineering, Faculty of Sciences and Engineering, University of M'Sila, M'Sila, Algeria . 2.

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Fresh, Mechanical, and Durability Characteristics of Self ...

This paper studies the fresh, hardened, and durability characteristics of SelfConsolidating Concrete incorporating Recycled Concrete Aggregate (SCCRCA). Twenty concrete mixtures were divided into five different groups, with constant water to cementitious materials ratio of, based on the Recycled Concrete Aggregate (RCA) content: 0, 25, 50 ...

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What Makes Concrete a Sustainable Building Material? The ...

Resource efficiency. The predominant raw material for the cement in concrete is limestone, the most abundant mineral on earth. Concrete can also be made with fly ash, slag cement, and silica fume, all waste byproducts from power plants, steel mills, and other manufacturing facilities. Durability.

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The fracture characteristics of crushed limestone sand ...

In this research, the fracture characteristics of crushed limestone sand concrete were experimentally investigated through a wedge splitting test, and the results were compared with those of crushed granite sand concrete and river sand concrete. The strength of .

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DETERMINING THE RECYCLED CONTENT OF CONCRETE .

An information series from the national authority on concrete masonry technology NCMA TEK 66B 1 DETERMINING THE RECYCLED CONTENT OF CONCRETE MASONRY PRODUCTS INTRODUCTION Sustainable development has been defined as development that meets the needs of the present without compromising the ability of future gen – erations to meet their own needs (ref. 1).

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