THE STABILITY BEHAVIOR OF AN ASPHALTIC CONCRETE ROAD SURFACE LAYER  DURING VARIATION OF VARIOUS TEMPERATURE DEGREE IN MARSHAL TEST

	THE STABILITY BEHAVIOR OF AN ASPHALTIC CONCRETE ROAD SURFACE LAYER DURING VARIATION OF VARIOUS TEMPERATURE DEGREE IN MARSHAL TEST
AL-TAQANI
Article 1, Volume 22, Issue 3, 2009, Pages 0-0
Abstract
There aren,t a lot of studies in a hot asphaltic concrete mixture field that depends on test process results on Marshall Method and determing the combination between the Marshall main properties such as (Stability , Bulk density , voids ratio percent , Flow and voids percent filled with bitumen) . The research depends on the bitumen percent of (4% , 4.5% , 5% , 5.5% and 6%) to determine the optimum bitumen content for Marshall test by using row materials purches to “ Daurah Asphalt Plant “ in project office of Amant Baghdad using grade of asphalt cement (40 – 50) penetration obtained from the Daurah Refinery “ . Through the formulas application the optimum bitumenouse content (O.B.C) which appear (5.16%) . Samples of asphaltic concrete with the (O.B.C) were tested then get results meet requirement of “ Specification for Roads and Bridges “ S.O.R.B – 1999 . Bitumen percent ratio should be not used in asphaltic concrete mix design with 4% and les 6% and up due to bad results and not fit the (S.O.R.B) specification in voids ratio percent ,voids ratio filled with bitumen for the first percentage and stability , flow , voids ratio percent , voids ratio percent filled with bitumen for the second percentage respectively . The results showed that the value of stability test in different degree of temperature increased with low of 60C0 as in 30C0 , 45C0 and it’s value decreased for the samples test up of 60C0 as in 70C0 test .

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