Recycled concrete aggregate (RCA) for infrastructure elements.

Details

• Creators:
  Volz, Jeffery S. ; Khayat, Kamal H. ; Arezoumandi, Mahdi ; Drury, Jonathan ; Sadati, Seyedhamed ; Smith, Adam ; Steele, Amanda
• Corporate Creators:
  Missouri University of Science and Technology
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Aggregates Durability Fresh Concrete Natural Aggregates Natural Resources Recycled Materials Structural Analysis Sustainable Development Wastes
• Publication/ Report Number:
  cmr14-014
• Resource Type:
  Tech Report
• Geographical Coverage:
  Missouri
• Corporate Publisher:
  Missouri. Dept. of Transportation. Division of Construction and Materials
• Abstract:
  With a growing demand for new construction and the need to replace infrastructure stretched beyond its service life, society
  
  faces the problem of an ever-growing production of construction and demolition waste. The Federal Highway Administration
  
  (FHWA) estimates that two billion tons of new aggregate are produced each year in the United States. This demand is anticipated
  
  to increase to two and a half billion tons each year by 2020. With such a high demand for new aggregates, the concern arises of
  
  the depletion of current sources of natural aggregates and the availability of new sources. Similarly, construction waste produced
  
  in the United States is expected to increase. From building demolition alone, the annual production of construction waste is
  
  estimated to be 123 million tons (FHWA). Currently, this waste is most commonly disposed of in landfills.
  
  To address both the concern of increasing demand for new aggregates and increasing production of waste, many states have
  
  begun to recognize that a more sustainable solution exists in recycling waste concrete for use as aggregate in new concrete, or
  
  recycled concrete aggregate (RCA). This solution helps address the question of how to sustain modern construction demands for
  
  aggregates as well as helps to reduce the amount of waste that enters already over-burdened landfills. Many states have begun to
  
  implement RCA in some ways in new construction. For instance, forty-one states have recognized the many uses of RCA as a raw
  
  material, such as for rip-rap, soil stabilization, pipe bedding, and even landscape materials. Thirty-eight states have gone a step
  
  further in integrating RCA into roadway systems for use as aggregate course base material. However, only eleven states have
  
  begun using RCA in Portland cement concrete for pavement construction. Furthermore, at the start of this research project, there
  
  were no acceptable standards or guidelines in the U.S. for utilizing RCA in structural concrete.
  
  The objective of this research was to determine the implications of using RCA in the production of new concrete. Specifically,
  
  the study evaluated the fresh and hardened properties, durability, and structural behavior of concrete containing RCA and, based
  
  on these results, developed guidelines on its use in infrastructure elements for MoDOT.
  
  
• Format:
  PDF
• Funding:
  Project TRyy1317
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fd416db915273504b87172bc0a17b562db65bcf87c5f4bca5361da99199c68fb49292a102ebce3238ca330a1ff887ba1f4fa9ffc2769e6071592504c24fdf603
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27482/dot_27482_DS1.pdf
• File Type:
  [PDF - 890.12 KB ]