Performance of Continuously Reinforced Concrete Pavement Containing Recycled Concrete Aggregates

2011 ◽  
Vol 2253 (1) ◽  
pp. 32-39 ◽  
Author(s):  
Jeffery R. Roesler ◽  
James Gregory Huntley ◽  
Armen N. Amirkhanian
Keyword(s):  
Reinforced Concrete ◽  
Concrete Pavement ◽  
Recycled Concrete ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates

Durability of Pavement Concretes Made with Recycled Concrete Aggregates

2012 ◽  
Vol 2290 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Jitendra Jain ◽  
Kho Pin Verian ◽  
Jan Olek ◽  
Nancy Whiting
Keyword(s):  
Base Material ◽  
Concrete Pavement ◽  
Recycled Concrete ◽  
Electrical Impedance Spectroscopy ◽  
Concrete Pavements ◽  
Chloride Permeability ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates ◽  
Air Content ◽  
Concrete Mixtures

There is a growing trend to replace the traditional ingredients of concrete pavement mixtures with more sustainable materials from a perspective of both the cost of raw materials and the carbon dioxide footprint. The availability of quality natural aggregates, which make up about 70% to 80% of concrete (by volume), is becoming more limited because of environmental restrictions on quarrying operations and longer hauling distances. The other major concern is disposal of old concrete pavements, which unless used as fill or base material for construction of new roadways, will have to be placed in the landfills. In this study, recycled concrete aggregates (RCA) obtained from crushing old concrete pavement were used as coarse aggregates at 0%, 30%, 50%, and 100% replacement levels (by mass) for natural virgin aggregates (NVA). Concrete mixtures were designed and produced to meet the concrete pavement requirements for air content, slump, and flexural strength stipulated by the Indiana Department of Transportation. All concrete mixtures were produced with 18.5% to 20.0% of the cement replaced (by mass) with ASTM C618 Class C fly ash. The physical and mechanical testing involved evaluation of slump, air content, and development of both flexural and compressive strengths. In addition, durability was assessed with the freeze–thaw test, scaling test, rapid chloride permeability (RCP) test, and non–steady state migration test. The most advantageous dosages for replacing NVA with RCA for concrete pavements were found to be 50%, on the basis of fresh concrete properties and the results of strength and durability tests. The applicability of electrical impedance spectroscopy for quick performance appraisal is presented on the basis of the experimental relationship between the RCP charge and bulk resistance of concrete.

Guidance for Increasing the Use of Recycled Concrete Pavement Materials

2021 ◽  
Author(s):  
Tara Cavalline ◽  
Mark Snyder ◽  
Tom Cackler ◽  
Peter Taylor
Keyword(s):  
Concrete Pavement ◽  
Recycled Concrete ◽  
Concrete Pavements ◽  
Pavement Materials ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates ◽  
Technical Requirements ◽  
Federal Highway ◽  
Pavement Recycling ◽  
The Us

Recycling concrete pavements has been a common practice in the US for decades, and recently, public agencies have been more closely examining recycling opportunities. Reasons supporting recycling include the diminishing quantity of good natural materials, economics, improved project execution, minimizing traffic disruption, and supporting sustainability goals. Many states, however, have specifications or policies that restrict concrete pavement recycling. The contracting industry may overlook opportunities to use recycled concrete aggregates (RCAs) due to a lack of familiarity with technical requirements or uncertainty of performance. The National Concrete Pavement Technology Center (CP Tech Center) recently completed a comprehensive set of technical resources for the Federal Highway Administration to assist practitioners with sound approaches to project selection, scoping and construction requirements to support increased use of recycled concrete pavement materials. This paper describes the results of a 2016 survey of agency and industry RCA usage, presents an overview of the technical resources prepared as part of this initiative, and presents recommendations for supporting broader application of recycling concrete pavement materials.

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