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(PDF) Comparison of Specifications for Recycled

01/11/2011  This paper reviews existing specifications, specifically for the application of crushed concrete or recycled concrete aggregate (RCA) as pavement material for unbound subbases and basecourses ...

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Development Of Guide Specifications For Recycled ...

demolition (CD) waste material. The document broadly outlines general specification requirements for recycled concrete and masonry materials, based on laboratory investigations and detailed local field performance evaluations of civil and municipal construction

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Guidance for Specification: Recycled and secondary

• Recycled concrete as aggregate will typically have higher absorption and lower specific gravity than natural aggregate and will produce concrete with slightly higher drying shrinkage and creep. These differences become greater with increasing amounts of recycled fine aggregates.

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Edil -No. 68 Specifications for Recycled Materials Used as ...

This report provides recommendations and specifications for recycled asphalt pavement and recycled concrete aggregate that can be used as unbound base course. It is based on research conducted at the University of Wisconsin-Madison and elsewhere and the discussions with the industry representatives and other professionals.

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Recycled Aggregates from Inert Waste

Annex 2 details the main standards and specifications relating to aggregates. The majority of recycled aggregate in Scotland is either capping material (e.g. 6F4 and 6F5) or subbase (e.g. Type 1). Some production sites can produce aggregates for concrete, such as washed sand, but this is less widespread. The WRAP specifier tool has details of the different aggregate types.

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Use of Recycled Aggregates in Construction

Recycled Aggregates Recycled Concrete Aggregate (RCA) Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass. Class 1A RCA is a well graded RCA with no more than 0.5% brick content. Partial replacement (30%) for natural aggregate in concrete for sidewalks, kerbs and gutters. Also for structural concrete

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Recycled Concrete Aggregates: Its Properties Uses

27/06/2019  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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Recycled Aggregate - CalRecycle Home Page

Caltrans Specifications-Existing: Caltrans' Standard Specifications, May 2006 covers aggregate base and aggregate subbase in Sections 25 and 26. These sections were updated in February 2007 to allow up to 100% recycled aggregate. Caltrans' SSPs allow up to 100% processed Limestone in Class 2 and 3 aggregate base, and also in Class 1, 2, and 3 aggregate subbases.

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Aggregates for Concrete - GreenSpec

• Recycled concrete as aggregate will typically have higher absorption and lower specific gravity than natural aggregate and will produce concrete with slightly higher drying shrinkage and creep. These differences become greater with increasing amounts of recycled fine aggregates.

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2014 Specifications Using Recycled Materials by

Specifications: Recycled Materials: Applications: PDF: 1993 Special Specification 3157. Cold Processed - Recycled Paving Material for Use as Aggregate Base Course - Statewide Use: Crushed concrete or other non-hazardous recycled materials, processed recycled asphalt pavements, bottom ash, foundry slag, Limestone and recycled crumb rubber Fly ash and bottom ash

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British Standards and the use of recycled aggregate in ...

BS EN 206:2013+A1:2016 Concrete — Specification, performance, production and conformity BS EN BS EN 933-11:2009 Tests for the geometrical properties of aggregates Part 11: Classification test for the constituents of coarse recycled aggregate BS EN 12620:2002+A1:2008 Aggregates for concrete. BS EN 206:2013+A1:2016. 3.1.2.14. reclaimed washed aggregate. Aggregate gained by washing fresh ...

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Recycled Aggregates from Inert Waste

Annex 2 details the main standards and specifications relating to aggregates. The majority of recycled aggregate in Scotland is either capping material (e.g. 6F4 and 6F5) or subbase (e.g. Type 1). Some production sites can produce aggregates for concrete, such as washed sand, but this is less widespread. The WRAP specifier tool has details of ...

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Use of Recycled Aggregates in Construction

3.1 Recycled Concrete Aggregate (RCA) 10 3.2 Recycled Concrete and Masonry (RCM) 11 3.3 Reclaimed Aggregate (RA) 12 3.4 Reclaimed Asphalt Pavement (RAP) 12 3.5 Reclaimed Asphalt Aggregate (RAA) 13 3.6 Glass Cullet 13 3.7 Scrap Tyres 14 3.8 Used Foundry Sand or Spent Foundry Sand 14 4 REUSED BY-PRODUCT 15 4.1 Air-cooled Blast Furnace Slag (BFS) 15 4.2 Granulated

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MPA Cement Fact Sheet 6 Use of recycled aggregates in concrete

crushed concrete or more general recycled aggregate (RA) when it contains substantial quantities of materials other than crushed concrete. Currently, only the use of coarse aggregate derived from construction or demolition waste is recommended for use in new concrete construction. RCA is not the same as reclaimed or recovered aggregate, where these materials are obtained from either the fresh ...

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2019 Recycled Concrete Usage in Aggregate Materials

19/12/2019  Standard Specifications for Road, Bridge and Municipal Construction. Table 1. is provided below listing the potential applications of recycled concrete materials, as highlighted in yellow. Table 1 - Maximum Allowable Percent of Recycled Material. Maximum Allowable Percent (by weight) of Recycled Material. Fine Aggregate for Concrete 9-03.1(2) 0 0 0 0 Coarse Aggregates for Concrete 9-03.1(4) 0 ...

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Recycled Concrete Aggregates: Its Properties

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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Aggregates for Concrete - GreenSpec

• ‘Aggregate’ is a term for any particulate material. It includes gravel, crushed stone, sand, slag, recycled concrete and geosynthetic aggregates. Aggregate may be natural, manufactured or recycled. • Aggregates make up some 60 -80% of the concrete mix. They provide compressive strength and bulk to concrete.

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Different Types Sizes of Aggregate for

Recycled concrete is created by breaking, removing, and crushing existing concrete to a preferred size. It is commonly used as a base layer for other construction materials. Recycled concrete can be used as aggregate in new concrete, particularly the coarse portion. When using the recycled concrete as aggregate, the following should be taken into consideration: Recycled concrete as aggregate ...

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Use of Crushed/Recycled Concrete as Drainable Base/Subbase ...

recycled concrete shall be placed in max 4-in lifts and each lift shall be compacted by a min of 3 passes w/ 10-ton roller (304.3.5) New Jersey Used as Dense-graded aggregate conforms with gradation and plasticity requirements (901.08) North Dakota Remixed at plant; coarse aggregate consist of min 20% coarse virgin one (560.04)

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2014 Specifications Using Recycled Materials by

Specifications: Recycled Materials: Applications: PDF: 1993 Special Specification 3157. Cold Processed - Recycled Paving Material for Use as Aggregate Base Course - Statewide Use: Crushed concrete or other non-hazardous recycled materials, processed recycled asphalt pavements, bottom ash, foundry slag, Limestone and recycled crumb rubber Fly ash ...

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The specification of recycled concrete aggregate for ...

Recycled Concrete Aggregate (RCA) by the construction industry has not been as impressive as the production by the recycling industry. This paper reviews existing specifications within Australia and internationally, specifically for the application of RCA as pavement material for unbound sub-bases and base-courses. Commonality of specifications is explored and differences that exist are ...

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British Standards and the use of recycled aggregate in ...

BS EN 206:2013+A1:2016 Concrete — Specification, performance, production and conformity BS EN BS EN 933-11:2009 Tests for the geometrical properties of aggregates Part 11: Classification test for the constituents of coarse recycled aggregate BS EN 12620:2002+A1:2008 Aggregates for concrete. BS EN 206:2013+A1:2016. 3.1.2.14. reclaimed washed aggregate. Aggregate gained by washing fresh ...

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Specifying recycled concrete aggregate -

01/04/2012  The Ontario Provincial Standard Specifications (OPSS) preclude the use of recycled concrete as an aggregate in concrete works. Additionally, OPSS 1001, Material Specification for Aggregates–Granular A, B, M, and Select Subgrade Material , does not allow the blending of aggregate products to improve physical properties.

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Use of Recycled Aggregates in Construction

3.1 Recycled Concrete Aggregate (RCA) 10 3.2 Recycled Concrete and Masonry (RCM) 11 3.3 Reclaimed Aggregate (RA) 12 3.4 Reclaimed Asphalt Pavement (RAP) 12 3.5 Reclaimed Asphalt Aggregate (RAA) 13 3.6 Glass Cullet 13 3.7 Scrap Tyres 14 3.8 Used Foundry Sand or Spent Foundry Sand 14 4 REUSED BY-PRODUCT 15 4.1 Air-cooled Blast Furnace Slag (BFS) 15 4.2 Granulated

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Recycled aggregate concrete (RAC) – comparative

Based on existing norms and specifications that allow the use of recycled aggregates in the production of concrete, a comparison is made of the parameters involved, such as density, water absorption and contaminants ratio within the recycled aggregates and maximum strength allowed for the recycled aggregate concrete, among others.

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Recycled Aggregates - Portland Cement Association

According to a 2004 FHWA study, 38 states recycle concrete as an aggregate base; 11 recycle it into new portland cement concrete. The states that do use recycled concrete aggregate (RCA) in new concrete report that concrete with RCA performs equal to concrete with natural aggregates. Most agencies specify using the material directly in the project that is being reconstructed.

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Recycled Concrete Aggregate(RCA) used in subbase

Disadvantages of Recycled Concrete Aggregate (RCA) • Lack of codes, specifications, standards and guidelines • Water absorption property of aggregate is high. • Demolished concrete contains mortar which creates dust during the crushing process and causes air pollution around the demolition area. • The water from washing RCA may contain a high pH value due to the alkaline nature of ...

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Use of Crushed/Recycled Concrete as Drainable Base/Subbase ...

recycled concrete shall be placed in max 4-in lifts and each lift shall be compacted by a min of 3 passes w/ 10-ton roller (304.3.5) New Jersey Used as Dense-graded aggregate conforms with gradation and plasticity requirements (901.08) North Dakota Remixed at plant; coarse aggregate consist of min 20% coarse virgin one (560.04)

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RECYCLED CONCRETE AGGREGATE (NYSDOT

27/11/2007  RECYCLED CONCRETE AGGREGATE (NYSDOT Specs) PT999 (Structural) (OP) 26 Nov 07 16:46. I want to use recycled concrete aggregrate as a base under under hot mix asphalt for a small road project I am using NYSDOT Standard Specifications (2006 ed) for all the items. But I dont see this item in the spec book. I am guessing it is one of the subbase courses, but they are identified

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Recycled Plastic Aggregate - Replas Polyrok

Polyrok concrete is the latest innovation from Replas, a sustainable recycled plastic aggregate alternative to mineral aggregate in concrete for pathways, kerbs channels that find a home for the most problematic waste stream, soft plastic. Polyrok consists of about 95% Red Group post-consumer soft plastic waste with about 5% engineered recycled content to ensure maximum performance in ...

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The specification of recycled concrete aggregate for ...

Recycled Concrete Aggregate (RCA) by the construction industry has not been as impressive as the production by the recycling industry. This paper reviews existing specifications within Australia and internationally, specifically for the application of RCA as pavement material for unbound sub-bases and base-courses. Commonality of specifications is explored and differences that exist are ...

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Specifying recycled concrete aggregate -

01/04/2012  The Ontario Provincial Standard Specifications (OPSS) preclude the use of recycled concrete as an aggregate in concrete works. Additionally, OPSS 1001, Material Specification for Aggregates–Granular A, B, M, and Select Subgrade Material , does not allow the blending of aggregate products to improve physical properties.

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CONCRETE WITH RECYCLED AGGREGATES - ULisboa

ARC (recycled concrete aggregate): recycled aggregate composed of more than 90% concrete and natural resources; ARM (mixed aggregate): recycled aggregate composed of less than 90% concrete and natural resources. The requirements for water absorption are quite demanding, and limit the use of masonry rubble, even in the non-structural solutions envisaged in this specification. The maximum ...

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MPA Cement Fact Sheet 6 Use of recycled aggregates in concrete

crushed concrete or more general recycled aggregate (RA) when it contains substantial quantities of materials other than crushed concrete. Currently, only the use of coarse aggregate derived from construction or demolition waste is recommended for use in new concrete construction. RCA is not the same as reclaimed or recovered aggregate, where these materials are obtained from either the fresh ...

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Recycled Aggregates - Portland Cement Association

According to a 2004 FHWA study, 38 states recycle concrete as an aggregate base; 11 recycle it into new portland cement concrete. The states that do use recycled concrete aggregate (RCA) in new concrete report that concrete with RCA performs equal to concrete with natural aggregates. Most agencies specify using the material directly in the project that is being reconstructed.

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

The specific definition for Recycled Concrete Aggregate (RCA) is a granular material manufactured by removing, crushing, and -cement concrete pavement for reuse with a hydraulic cementing medium to produce fresh paving concrete. The aggregate retained on the 4.75 mm sieve is called coarse aggregate and the material passing the 4.75 mm sieve is called fine aggregate. The temporary

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Recycled Concrete Aggregate(RCA) used in subbase

Disadvantages of Recycled Concrete Aggregate (RCA) • Lack of codes, specifications, standards and guidelines • Water absorption property of aggregate is high. • Demolished concrete contains mortar which creates dust during the crushing process and causes air pollution around the demolition area. • The water from washing RCA may contain a high pH value due to the alkaline nature of ...

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Different Types Sizes of Aggregate for

Recycled concrete is created by breaking, removing, and crushing existing concrete to a preferred size. It is commonly used as a base layer for other construction materials. Recycled concrete can be used as aggregate in new concrete, particularly the coarse portion. When using the recycled concrete as aggregate, the following should be taken into consideration: Recycled concrete as aggregate ...

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ICE Themes Recycled Aggregates: Use in

ICE Themes Recycled Aggregates: Use in Concrete provides an overview of the full spectrum of research undertaken on the use of recycled aggregate as a replacement for commonly used natural aggregate in a wide range of concrete applications. Featuring selected case studies, and explanations of the standards and specifications, this volume makes an excellent source of information for

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The Importance of Concrete Recycling

29/12/2017  Aggregate base course (road base) The largest application of recycled concrete aggregate (RCA) is for the aggregate base course in road construction. This term refers to the center layer of the roadbed. A cross-section of pavement would show dirt, or subgrade, as the lowest of three levels, layered on top by aggregate base course, and finally capped on top by pavement, either concrete

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