1. 1. 2. 3. 4. 5. 6. 7. 8. © Prediction Of Asphalt Rheological Properties Using HP-GPC Wahhab, HIAA; Asi, IM; Ali, FM; Al-Dubabi, IA ASCE-AMER SOC CIVIL ENGINEERS, JOURNAL OF MATERIALS IN CIVIL ENGINEERING; pp: 6-14; Vol: 11 King Fahd University of Petroleum & Minerals http://www.kfupm.edu.sa Summary Asphalt cement is a rheological material because its deformation characteristics vary not only with load but also with rate of load application. The chemical composition of asphalt cement affects its behavior. One of the methods that has been developed to study the molecular structure of materials is high pressure-gel permeation chromatography CHP-GPC). In this paper, the possibility of using the HP-GPC chromatograms to predict asphalt rheological properties is evaluated. Mathematical models are generated to predict the rheological properties of asphalt cement based on its molecular size. In the Gulf countries, there are currently four asphalt-producing refineries that include Ras Tanura and Riyadh refineries in Saudi Arabia, Al-Ahmadi refinery in Kuwait, and Bapco refinery in Bahrain. The asphalt produced by those refineries is referred to as 'Arabian asphalt.' For this study to be comprehensive, it was decided to collect asphalt samples from all those refineries. Another set of polymer modified asphalt samples with 5, 10, and 15% crumb rubber and 3, 6, and 9% styrene- butadiene-styrene was included in this study to evaluate the effect of polymer modification on the molecular size distribution of the asphalt samples. References: *ASPH I RES CTR FE, 1993, BACKGR SHRP ASPH BIN, P1 BRANTHAVER JF, 1993, BINDER CHARACTERIZAT, V2, P1 BREEN JJ, 1969, P AAPT, V38, P706 BRULE B, 1986, 1096 TRANSP RES BOAR, P22 BUTTON JW, 1983, 268 NCHRP TRANSP RES BYNOM D, 1970, P AAPT, V39, P683 DONALDSON GR, 1988, J LIQ CHROMATOGR, V11, P749 GARRICK NW, 1986, THESIS PURDUE U W LA, P6 Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa

2. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. © GARRICK NW, 1988, P AAPT, V57, P26 GARRICK NW, 1994, J MATER CIVIL ENG, V6, P376 GLOVER CJ, 1988, 1171 TRANSP RES BOAR, P71 HATTINGH MM, 1984, P ASS ASPHALT PAVING, V53, P197 JENNINGS PW, 1981, USE HPLC NMR SPECTRO, V26, P915 JENNINGS PW, 1982, FHWAMT82001 MONT DEP, P24 JENNINGS PW, 1985, FHWAMT85001 MONT DEP JENNINGS PW, 1985, P 64 ANN M TRANSP RE JENNINGS PW, 1988, 1171 TRANSP RES BOAR, P59 MCLEOD NW, 1989, P AAPT, V58, P410 MONISMITH CL, 1985, ASPHALT PAVEMENTS MI, P1 NOURELDIN AS, 1982, THESIS CAIRO U CAIRO, P191 PRICE RP, 1990, P ASS ASPHALT PAVING, V59, P1 PUZINAUSKAS VP, 1967, P AAPT, V36, P489 RICHMOND WB, 1967, P ASS ASPHALT PAVING, V36, P106 ROBERTS FL, 1991, HOT MIX ASPHALT MAT, P21 TERREL RL, 1988, NATL PAVEMENT ASS IN, V102 WAHHAB HIA, 1996, ADAPTATION SHRP PERF ZENEWITZ JA, 1987, PUBLIC ROADS, V51, P72 For pre-prints please write to: abstracts@kfupm.edu.sa Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa