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:
  • Natural aggregates
  • Natural resources
  • Wastes
  • Aggregates
  • Sustainable development
  • Recycled materials
  • Fresh concrete
  • Durability
  • Structural analysis
• 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.
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• Format:
  PDF
• Funding:
  Project TRyy1317
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27482/dot_27482_DS1.pdf
• File Type:
  [PDF - 890.12 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fd416db915273504b87172bc0a17b562db65bcf87c5f4bca5361da99199c68fb49292a102ebce3238ca330a1ff887ba1f4fa9ffc2769e6071592504c24fdf603