Recycled Concrete Aggregate Federal Highway …
Specifications, construction practices and implementation challenges will also be documented. This information will then be disseminated to all STAs through technical guidance, training, and guide specifications, as necessary. Scope: Minnesota, Utah, Virginia, Texas, and Michigan were the states chosen for an in-depth review of their recycled concrete aggregate program. These states were ...
(PDF) Comparison of Specifications for Recycled …
Comparison of Specifications for Recycled Concrete Aggregate for Pavement Construction Article (PDF Available) in Journal of ASTM International 8(10):103646 · November 2011 with 2,302 Reads
Guidance for Specification: Recycled and …
When using the recycled concrete as aggregate, the following should be taken into consideration: • 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.
Specifying recycled concrete aggregate - …
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.
Recycled Concrete Aggregate - an overview | …
Recycled concrete aggregate (RCA) comes from demolition of Portland cement concrete. Given that the original concrete might have been strong or weak, dense or open graded, fresh or weathered, then the aggregate’s pieces can be expected to vary similarly. If the RCA comes from a central recycling plant the consistency will have been addressed, to some extent, by blending of materials from ...
Recycled Materials Specifications
Specification 901: Coarse Aggregate - Reclaimed Portland Cement Concrete. Specification 911: Base - Reclaimed Portland Cement Concrete, reclaimed general crushed concrete. Recycled stone . Note: All recycled stone products are governed by Specification 972. Other sections may also apply.
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 glass in Class 2 and 3 aggregate base, and also in Class 1, 2, and 3 aggregate subbases.
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 …
Aggregates » Railway Recycling
Washed recycled aggregate. Compliant with civil engineering and agricultural drainage specifications. Available as a washed product from Whitemoor LDC, Cambs for use as a Type B filter media for drainage work. Available as a washed product from Whitemoor LDC, Cambs for use as a pipe bedding material. Graded to comply with concrete and asphalt specifications as a recycled aggregate. Washed and ...
Colorado Aggregate Recycling | Concrete & Asphalt
We offer a variety of grades and types of recycled concrete and asphalt materials tailored to meet your projects needs and specs at Colorado Aggregate Recycling. Recycled aggregates offer superior compaction, better yield, higher "R" values, and greater durability over virgin (quarry or pit) aggregate bases. The use of recycled aggregates are also typically authorized by State Transportation ...
A Specification for Recycled Aggregate for use in Minor ...
A Specification for Recycled Aggregate for Minor Schemes - September 2012. Foreword. The development of this specification for recycled aggregate . originated from the recognition that high quality virgin aggregates were and are being specified as the unbound sub-base materials for minor schemes such as car parks, cycle paths, estate roads, footpaths, etc. where very low traffic load is ...
Development Of Guide Specifications For Recycled ...
recycled aggregates compared to conventional aggregates arise mainly from relatively porous and less dense residual mortar lumps or particles adhering to the surfaces of original natural aggregate particles. The specific gravity of coarse recycled aggregate ranges from 2.2 to 2.5, which is slightly lower than that of conventional virgin aggregates. The fines fraction of recycled aggregates has a lower density …
Concrete recycling - Wikipedia
Concrete recycling is the use of rubble from demolished concrete structures. Recycling is cheaper and more ecological than trucking rubble to a landfill. Crushed rubble can be used for road gravel, revetments, retaining walls, landscaping gravel, or raw material for new concrete.Large pieces can be used as bricks or slabs, or incorporated with new concrete into structures, a material called ...
Transportation Applications of Recycled Concrete Aggregate
States recycling concrete as aggregate base . Figure 2.3. States recycling concrete as aggregate for PCC . Advantages: Transportation agencies’ experiences and research studies have shown that recycled concrete aggregate (RCA), under specific conditions, has the potential to produce strong,
Use of Crushed/Recycled Concrete as Drainable Base/Subbase ...
Recycling of Concrete • Aggregate in concrete comprise about –80 to 85 percent of the mix by mass –60 to 75 percent of the mix by volume • Recycled concrete aggregate (RCA) –Crushed aggregate from existing concrete –Consists of high-quality, well-graded aggregates (usually mineral aggregates), bonded by a hardened cementitious paste 6
Recycled Aggregate - an overview | ScienceDirect …
However, due to the general availability of virgin aggregates (at least at the regional or national scale), often most of the recycled C&D debris is used as road base or subbase material, as recycled aggregates are generally less expensive or “valuable” than high-quality concrete aggregate. To favor the use of recycled aggregate, and to enhance the recycling rate of C&DW, Green Public ...
PeltonAggregates - Gravel - Wilmington, North …
Welcome to Pelton Aggregates! Gravel, stone, recycled concrete and asphalt. Welcome to Pelton Aggregates! Gravel, stone, recycled concrete and asphalt . Welcome to Pelton Aggregates! Gravel, stone, recycled concrete and asphalt. About Us. Recycle concrete. We will process and crush your concrete to a saleable material on your site. Recycle asphalt. We will crush RAP to your size specifications ...
State Materials Office - Florida Department of …
The current FDOT specifications allow for crushed concrete from an existing concrete pavement to be recycled into a new pavement as base or aggregate material. Specifications also allow for the use of crushed concrete from general construction and demolition waste if the source was previously approved by the FDOT (the source shall have a DEP permit (per section 62-701.730) or be qualified as a clean …