Recycled Materials and Byproducts in Highway Applications—Summary Report, Volume 1 (2013) / Chapter Skim
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Pages 55-62
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From page 55... ...
55 The initial survey requested that respondents identify contacts for projects using any of the byproducts in any of the highway applications. This request yielded 85 agency contacts for 92 combinations of byproducts and highway applications, which were used to conduct telephone interviews using the following questions: 1.
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56 Material Applications PCC HMA Aggregate, Embankment, and Fill Coal Combustion Byproducts Fly Ash (general) 5 0 0 Fly Ash, Type C 6 0 0 Fly Ash, Type F 7 0 0 Bottom Ash 0 0 1 Ponded Ash 0 0 1 Total 18 0 2 Slags BFS 1 1 1 GGBFS 5 2 3 Boiler Slag 0 0 0 Steel Slag 1 3 1 Copper Slag 0 0 1 Total 7 6 6 Mineral and Quarry Byproducts Baghouse Fines 0 2 0 Pond Fines 0 1 0 Screenings 0 1 0 Copper, Silver, and/or Gold Tailings 0 1 0 Total 0 5 0 Tire Byproducts Shredded Tires 0 1 2 Terminal Blend (wet process)
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57 • Slag byproducts (six interviews) • Mineral and/or quarry byproducts (five interviews)
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58 slower production rates (Nebraska) or contractor familiarity with using RAP (Missouri)
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59 ucts should be based on performance and not legislatively driven. Environmentally related comments included a concern with potential health problems from small particle sizes of the roofing byproduct components and the need to keep the shingles away from the flames in the HMA drum (i.e., smoking)
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60 recycled Concrete aggregates Byproducts in Unbound applications Nine states used RCA as an aggregate replacement in base applications (see Table 32)
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61 Application Byproduct Category Type of Byproduct State B et te r th an N at ur al M at er ia l C os tE ff ec tiv e G oo d U se o f R ec yc le d B yp ro du ct Im pr ov ed W or ka bi lit y A SR R es is ta nc e D ur ab ili ty a nd /o r Pe rf or m an ce St re ng th Su lf at e R es is ta nc e Fr ic tio n R ed uc ed Pe rm ea bi lit y N oi se R ed uc tio n L on ge r A pp lic at io n L if e BASE (unbound material) Coal combustion Bottom & ponded ash MO X RCA RCM CO X X X DE X IA X MD X NE X MO X VA X X Slag BFS slag NY X X X UT X Tires Shredded NY X VA HMA Manufacturing and construction CKD MO X TX X X Shingles, man.
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From page 62... ...
62 Application Byproduct Category Type of Byproduct State N ot C os tE ff ec tiv e C lo gg ed D ra in ag e Sy st em s C on st ru ct io n D if fi cu lti es L ac k of A va ila bi lit y Po or E xp er ie nc e B yp ro du ct M at er ia l P ro pe rt ie s C lim at e L im ita tio ns L ac k of E xp er ie nc e M ix D es ig n A dj us tm en ts A dd iti on al T ra in in g N ee de d fo r In sp ec to rs a nd F ie ld S ta ff C on ta m in at es in B yp ro du ct R eg ul at io ns a nd P ol iti cs N ee d to R es tr ic t S ou rc e of B yp ro du ct E nv ir on m en ta l C on ce rn s BASE (unbound material) RCA -- VA X MS X TX X Slag Copper slag IL X Tires Shredded NY X X VA HMA Manufacturing and construction Shingles, man., & tear-offs IA X TX X VA X Mineral and Quarry Baghouse CO X Copper, silver, & gold tailings TX Pond finds & screenings GA X RAP -- ID X CO X GA IA MS MO X NM X NJ NY TX X VA X X WA X HMA Slag BFS FL X GGBFS IA Steel IA X IA X CO X VA X X Tires Dry AK X X WA X X Shredded tires DE X NV X Terminal, wet NY X Wet NY X NY X X CO X GA X VA X PCC Fly ash C NE X C, F CO ND X TX X F ID General NV DE X WA X Man.
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