Recycled Materials and Byproducts in Highway Applications—Summary Report, Volume 1 (2013) / Chapter Skim
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Pages 31-36
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From page 31... ...
31 Recycled concRete AggRegAtes Background The types of PCC byproducts that were evaluated for use in highway applications included: • RCA (FHWA definition) • CDW RCM • PCC manufacturing byproducts: – Fresh concrete reused in other loads of fresh concrete – End of day hardened PCC, fractured (washed or unwashed for fines control)
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32 tion to include reclaimed bridge PCC. Little work has been done until very recently in the United States on the use of construction demolition byproducts in highway applications.
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33 Number of Applications States Concrete, Plant, End of Day Waste and Water Returned Fresh Mix Added to New Batch RCA, Crushed and Washed RCA, Crushed but Unwashed RCA, Unknown Type 9 -- -- -- -- ID 4 -- -- IL -- -- 3 -- -- CO, ND FL, GA -- 2 IL -- LA, MD, NC, VA, VT, WA IL, KY, MN, ND, WA, WI -- 1 MO, NC, NE, VA,TX NC AL, DE, FL, MN, MS, NJ, OR, OK, SC, WI AZ, CO, CT, DC, HI, IN, ME, MO, NC, NE, NH, NJ, NY, OH, OK, PA, TX, VA GA, MO, ND, NV, VT TAbLE 12 STATES USINg RCA byPRODUCTS IN HIgHWAy APPLICATIONS Reclaimed Concrete Materials 2009 Concrete Plant - End of Day Waste and Water 1 1 1 1 2 1 2009 Reclaimed Concrete Aggregate, Crushed and Washed 1 1 3 4 2 1 1 2 3 NJ - 1 DE - 1 MD-2 1 1 1 2 VT-2 1 2 2009 Reclaimed Concrete Aggregate, Crushed but Unwashed 1 1 1 1 1 1 CT-1 DC -1 NJ-1 1 1 1 1 3 3 2 1 2 2 2 2 2 1 1 1 1 NH-1 2009 Reclaimed Concrete Material, Unknown Type 9 1 1 1 1 VT-1 FIGURE 12 Agency survey results for recycled concrete aggregate byproducts (numbers indicate the number of applications that use the byproduct)
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From page 34... ...
34 literature Review summary guidance was found in the literature for minimizing embrittlement of the mix binder when using high levels of RAP, improving consistency of mix properties with stockpiling practices, using RAP in mechanically stabilized earth (MSE) , and cost considerations.
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35 Byproducts Number of States Using Byproduct in a Given Highway Application Asphalt Cements or Emulsions Crack Sealants Drainage Materials Embank. Flowable Fill HMA Pavement Treatments (non-structural)
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36 Number of Applications States Baghouse Fines (HMA plant) HMA, Unmilled (chunks)
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