EVALUATION OF RAP FOE USE AS A CLEAN FILL

Transcription

1 TVALUATON OF HOT MX ASPHALT FOR LEACHABLTY http ://www. asphaltinstitute.org/environaeachrap.html EVALUATON OF RAP FOE USE AS A CLEAN FLL Anthony J. Kriech (Heritage Research Group, 7901 W. Morris St., ndianapolis, ndiana 46231, U.S.t? tony.kriech@heritage-enviro.com) ; 0. BACKGROUND The APA (llinois Asphalt Pavement Association) has asked Heritage Research Group to evaluate six for their potential use as a clean fill. n certain situations the RAP, which is produced by milling an olc and could be used on site for clean fill. The goal of this testing program is to determine if the RAP cor environmentally unsuitable for clean fill. UP (Reclaimed Asphalt Pavements) pavement is unsuitable for recycling aims materials which may make it 1.0 STE LOCATONS Six RAP samples were selected based on achieving a wide geographical cross section of the state of 1 aggregates, as well as asphalt sources, were included in the study. The sample location can be found ir code. nois. This would ensure that different rable A with a sample description and 2.0 SAMPLE LOG-N AND PREPARATON Samples were received directly from DOT (llinois Department of Transportation) personnel via UPS Form. This information includes date sampled, location, project, type of material, how it was removed information is summarized in the sample identification Table A. The 50 lb. samples were split using a representative samples for further testing. along with a Sample dentification md person obtaining the sample. This ;ikon splitter to obtain smaller 3.0 SAMPLE ANALYSS The sample analysis was performed in two parts. The first was physical testing of the RAP for typical content, gradation (aggregate sizing) and Abson Recovery to look at the physical properties of the recc removed from the aggregate. These tests were performed by Heritage Research personnel using appro] Testing and Materials) and AASHTO (American Association of State Highway and Transportation Of is inspected by AMRL (AASHTO Materials Reference Laboratories), a division of the National Burea laboratory equipment for these tests. Heritage Research also participates in a round robin of laboratori, Yoperties. This includes asphalt,ered asphalt cement, which is iate ASTM (American Society for cials) procedures. Heritage Research of Standards for procedures and conducted by AMRL for these 1 of 10 10/24/ AM

2 EWALUA%ON OF HOT MX ASPHALT FOR LEACHABLTY laboratory equipment for these tests. Heritage Research also participates in a round robin of laboratorid procedures on a regular basis. The results of the physical tests are enclosed in Table B. The environmental testing involved testing for PCB's (Polychlorinated Biphenyls) on the samples befo were also prepared for TCLP (Toxic Characteristic Leachability Procedure) for each RAP source. Sam size requirements of the test. Samples were hand carried to Heritage Environmental Services - Come personnel. Following the TCLP test the leachate was tested for semivolatile organics, Polynuclear Aro and metals by Atomic Absorption. Test procedures were in accordance with EPA procedures and are as follows. TCLP Procedure 11 Method/Procedure 11 PCB Extraction Procedure sw PCB Analysis (1 SW ( SW i conducted by AMRL, for these e leachate testing dentical samples lles were crushed to correspond to the cial Laboratories by Heritage Research iatic Hydrocarbons (PAH's) by HPLC Semivolatiles GC/MS PAH's Metals SW SW SW A summary report of the results is listed in Table C. 4.0 COMMENTS 4.1 Physical testing indicates that these RAP samples are typical in gradation, as properties to other RAP materials tested by Heritage Research Group. 4.2 PCB's were tested on the RAP samples, not on the leachate after TCLP. The weight basis in mg/kg. or parts per million. There is not a currently known methoc results it appears that no PCB's were found at the detection limits listed in any sa 4.3 TCLP leachate did not contain any of the standard semivolatile compounds nl detection limits listed. t should be noted that semivolatiles are listed in 1 g/liter, w )halt content and asphalt residue.esults were then measured on a for testing on leachate. From these iple. cmally tested for by the EPA at the ich is parts per billion. 2 of The polynuclear aromatic hydrocarbon show up in only trace levels. Naphtha1 ne, the most volatile PAH is still AM

3 EVALUATON OF HOT MX ASPHALT FOR LEACHABLTY The polynuclear aromatic hydrocarbon show up in only trace levels. under a half a part per billion, which is well within any guidelines tested carcinogen which is often used as a marker compound for PAH's, was reported. 4.5 Metals were also tested and found to have measurable values in th samples, but times below maximum concentration of contaminants Conservation Recovery Act) for hazardous materials by characteristics below national drinking water standards for this metal. For metals Chrome and lead are also below the Table D guidelines for haz would, however, not meet drinking water standards. t is important to p whereas Site #2 had low, but measurable levels of lead, chrome, and same project, but at different locations. This could indicate that c having a low, but measurable level. Barium could be from a lube a same is true for chrome, a wear metal. Lead could also be from c Background samples from soils along the roadside have been studie higher levels of lead than encountered in this sample due to the use rium is present in all three LP under RCRA (Resource guidelines). Barium was also below Table D guidelines.. The leachate on Site #2 # meets all guidelines, ese were taken from the urface was a possible cause for ual to find much 5.0 CONCLUSONS After a thorough investigation of these samples it can be ascertained that all of maximum concentration for the contaminants by characteristic. Due to asphalt surprising. The migration of metals and organics are impaired greatly by the m which may be spread on the road surface later through spills or accidents, whi on this representative group of RAP samples would suggest that RAP should TABLE A Sampled Taking Samples Alex Kedas Alex Kedas Leroy 3 of 10 10/24/97 10:58 AM

4 ~ EVLUATON OF HOT MX ASPHALT FOR LEACHABLTY 1 #3 1 10/11/90 11 Peoria L 88 FA /88171 Surface Leroy Williams #4 / 10/15/90 Cook First / #80451 Avenue Surface Eddie Pizarro #5 09/26/90 St. Clair L 159 # FA600 Surface/Binder Allan Guttmann #6 / 09/13/90 1 Jackson L 3 L 151 #98071 FA14 Surface 1 Cot1 Milling Larry Miloshewski Viscosity F 11 Gradation / of 10 1Ql AM

5 EVALUATON OF HOT MX ASPHALT FOR LEACHABLTY Passing 3/41' Passing 1/2" Passing 3/8" ( Passing # Passing # Passing # ( ( Passing # ( Passing #50 ( ( 16.6 ( ( Vp5q"V // / 98* ll H ll il ll gm il TABLE C State of llinois TCLP Test Results 5 of :58 AM

6 EVALUATON OF HOT MX ASPHALT FOR LEACHABLTY t' 11 Phenanthrene ) BDL 11 BDL BDL 11 BDL 11 BDL 11 Anthracene (1 BDL ( BDL BDL 11 BDL 11 BDL 11 Fluorathene 11 BDL 11 BDL BDL 1) BDL 11 BDL (1 Pyrene 11 BDL 11 BDL BDL 11 BDL 11 BDL 11 Benzo(A)Anthracene 11 BDL 11 BDL BDL 11 BDL Chrysene 11 BDL 11 BDL BDL 11 BDL ) BDL 11 Benzo(B)Fluoranthene 11 BDL 11 BDL BDL 11 BDL 11 BDL 11 Benzo(K)Fluoranthene 1) BDL 11 BDL BDL 11 BDL Benzo(A)Pyrene 11 BDL BDL BDL 1) BDL 11 BDL ( Dibenzo(A,H)Anthracene ) BDL 11 BDL ( Benzo(G,H,)Perylene 11 BDL 1) BDL ndeno( 1,2,3-cd)Pyrene BDL 11 BDL Metals, mg/l (Barium BDL (Cadmium 11 BDL 1 BDL BDL 11 BDL 11 BDL (1 Chromium ( BDL ( BDL 11 BDL 11 BDL (1 Lead ( BDL ( BDL 11 BDL 11 BDL Arsenic BDL 11 BDL Selenium BDL 11 BDL 11 BDL BDL 11 BDL ( BDL BDL 11 BDL 11 BDL 6 of 10 10/24/97 10:58 AM

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8 EVALUATON OF HOT MX ASPHALT FOR LEACHABLTY TABLE D Maximum Concentration of Contaminants for the Toxicity Characterie tic (TCLP) rd0041 DO1 8 DO06 Arsenic 5.0 Barium Benzene Cadmium DO Carbon Tetrachloride DO20 11 Chlordane ) 0.03 DO Chlorobenzene 1) DO22 11 Chloroform DO07 11 Chromium DO23 ) 0-cresol DO24 (1 m-cresol of 10 10/24/ AM

9 ETALUATON OF HOT MX ASPHALT FOR LEACHABLTY [ p-cresol T cresol T - 2,4-~ ,4-Dichlorobenzene 7.5 DO ,2-Dichloroethane DO ,-Dichloroethylene DO30 2,4-Dinitrotoluene T - Endrin Heptachlor (and its hydroxide) 1 Hexachlorobenzene 71Hexachlorobutadiene 1 Hexachloroethane 1 - Lead DO37 Nitrobenzene Pentachlorophenol 9 of AM

10 EWALUATON OF HOT MX ASPHALT FOR LEACHABLTY html Pyridine Selenium Silver Tetrachloroethylene Toxaphene Trichloroethylene 2,4,5-Trich lorop henol 2,4,6-Trich lor0 p henol 1.o o 0.2 Return to Main Page 1 About Asphalt nstitute Laboratory Servic Technical Publications Seminars Membership nformation Members Only What's New 1 Superpave nformation Environmental nformation FAO's Asphalt nstitute Research Hot Links Updated Any comments or questions on this web site to webmaste s 10 of AM