A Comparative Study Of Roller And Hammer Compacted Asphalt Concrete

Abstract

In this work, Dense and Gap graded Asphalt Concrete samples were compacted in the laboratory using two modes, the first one was the traditional Marshall method of hammer compaction; Cylindrical specimens were constructed using three different Asphalt percentages; While the second mode was the TRRL roller wheel compaction, slab samples of (30×30×7) cm were constructed using the same Asphalt percentages, core specimens were obtained from the slabs. All of the Asphalt Concrete specimens were subjected to Marshall properties determination, indirect tensile stress test, Hveem stability and cohesion tests. A comparative analysis of testing results was conducted. It was concluded that Dense graded Asphalt Concrete shows superior quality when compared to Gap graded one when roller wheel compaction was adopted. Gap graded Asphalt Concrete shows higher quality when Marshall Hammer compaction was adopted. ‫اﻟﺨﻼﺻﺔ‬ ‫ﺒﻨﻭﻋﻴﻥ‬ ‫ﺍﻻﺴﻔﻠﺘﻴﺔ‬ ‫ﺍﻟﺨﺭﺴﺎﻨﺔ‬ ‫ﺘﺤﻀﻴﺭ‬ ‫ﺍﻟﺩﺭﺍﺴﺔ‬ ‫ﻫﺫﺓ‬ ‫ﻓﻲ‬ ‫ﺘﻡ‬-‫ﺒﺎﻟﺘﺩﺭﺝ‬ ‫ﺍﻟﻨﻭﺍﻗﺹ‬ ‫ﻭﺫﺍﺕ‬ ‫؛‬ ‫ﺍﻟﻜﺜﺎﻓﺔ‬ ‫ﻋﺎﻟﻴﺔ‬-‫ﺍﻟﻤﺨﺘﺒﺭ‬ ‫ﻓﻲ‬ ‫ﺘﺤﻀﻴﺭ‬ ‫ﺘﻡ‬ ‫ﺤﻴﺙ‬ ‫ﺒﺎﻟﻤﻁﺭﻗﺔ؛‬ ‫ﺒﺎﻟﻀﻐﻁ‬ ‫ﺍﻟﺘﻘﻠﻴﺩﻴﺔ‬ ‫ﻤﺎﺭﺸﺎل‬ ‫ﻁﺭﻴﻘﺔ‬ ‫ﻜﺎﻨﺕ‬ ‫ﺍﻻﻭﻟﻰ‬ ‫ﻁﺭﻴﻘﺘﻴﻥ؛‬ ‫ﺒﺎﺴﺘﺨﺩﺍﻡ‬ ‫ﺍﺴﻁﻭﺍﻨﻴﺔ‬ ‫ﻨﻤﺎﺫﺝ‬ ‫ﺒﺤـﻭﺙ‬ ‫ﻟﻤﺨﺘﺒـﺭ‬ ‫ﻭﺍﻟﻌﺎﺌﺩﺓ‬ ‫ﺍﻟﻤﺩﻭﻟﺒﺔ‬ ‫ﺒﺎﻟﺤﺎﺩﻟﺔ‬ ‫ﺍﻟﻀﻐﻁ‬ ‫ﺒﺎﺴﺘﺨﺩﺍﻡ‬ ‫ﺍﻟﺜﺎﻨﻴﺔ‬ ‫ﺍﻟﻁﺭﻴﻘﺔ‬ ‫ﻜﺎﻨﺕ‬ ‫ﺒﻴﻨﻤﺎ‬ ‫ﻤﺨﺘﻠﻔﺔ؛‬ ‫ﺍﺴﻔﻠﺕ‬ ‫ﺒﻨﺴﺏ‬ ‫ﺍﺒﻌﺎﺩ‬ ‫ﺫﺍﺕ‬ ‫ﺴﻘﻔﻴﺔ‬ ‫ﻨﻤﺎﺫﺝ‬ ‫ﺘﺼﻨﻴﻊ‬ ‫ﺘﻡ‬ ‫ﺤﻴﺙ‬ ‫ﺍﻟﺒﺭﻴﻁﺎﻨﻲ‬ ‫ﺍﻟﻁﺭﻕ‬ ‫ﻭ‬ ‫ﺍﻟﻤﻭﺍﺼﻼﺕ‬ 30 * 30 * 7 ‫ﻨﺴـﺏ‬ ‫ﻨﻔﺱ‬ ‫ﻭﺒﺎﻋﺘﻤﺎﺩ‬ ‫ﺴﻡ‬ ‫ﺍﻟﻨﻤ‬ ‫ﻫﺫﻩ‬ ‫ﻤﻥ‬ ‫ﻟﺒﺎﺏ‬ ‫ﻋﻴﻨﺎﺕ‬ ‫ﺍﺴﺘﺨﺭﺍﺝ‬ ‫ﺘﻡ‬ ‫ﺍﻟﺴﺎﺒﻘﺔ؛‬ ‫ﺍﻻﺴﻔﻠﺕ‬ ‫ﺍﻟﺴﻘﻔﻴﺔ‬ ‫ﺎﺫﺝ‬. ‫ﺍﻟﻤﺒﺎﺸـﺭ؛‬ ‫ﻏﻴـﺭ‬ ‫ﺍﻟﺸﺩ‬ ‫ﺍﻟﻤﺎﺭﺸﺎﻟﻴﺔ؛‬ ‫ﺍﻟﺨﺼﺎﺌﺹ‬ ‫ﻟﻔﺤﻭﺹ‬ ‫ﺍﻟﻴﻬﺎ‬ ‫ﺍﻟﻤﺸﺎﺭ‬ ‫ﺍﻻﺴﻔﻠﺘﻴﺔ‬ ‫ﺍﻟﺨﺭﺴﺎﻨﺔ‬ ‫ﻨﻤﺎﺫﺝ‬ ‫ﺠﻤﻴﻊ‬ ‫ﺘﻌﺭﻀﺕ‬ ‫ﻫﻴﻔﻴﻡ‬ ‫ﻭﺘﻼﺼﻕ‬ ‫ﺜﺒﺎﺕ‬. ‫ﻋﻨـﺩ‬ ‫ﻤﺘﻔﻭﻗـﺔ‬ ‫ﺒﻨﻭﻋﻴـﺔ‬ ‫ﺘﻜﻭﻥ‬ ‫ﺍﻟﻜﺜﺎﻓﺔ‬ ‫ﻋﺎﻟﻴﺔ‬ ‫ﺍﻻﺴﻔﻠﺘﻴﺔ‬ ‫ﺍﻟﺨﺭﺴﺎﻨﺔ‬ ‫ﺒﺎﻥ‬ ‫ﺍﻻﺴﺘﻨﺘﺎﺝ‬ ‫ﻭﺘﻡ‬ ‫ﻟﻠﻨﺘﺎﺌﺞ‬ ‫ﻤﻘﺎﺭﻥ‬ ‫ﺘﺤﻠﻴل‬ ‫ﺍﺠﺭﻱ‬ ‫ﺍﻟﻨﻭﺍﻗﺹ‬ ‫ﺫﺍﺕ‬ ‫ﺒﺎﻟﺨﺭﺴﺎﻨﺔ‬ ‫ﻤﻘﺎﺭﻨﺘﻬﺎ‬ ‫ﺍﻟﺨﺭﺴـﺎﻨﺔ‬ ‫ﺘﻌﻁـﻲ‬ ‫ﺒﻴﻨﻤـﺎ‬ ‫ﺍﻟﻤﺩﻭﻟﺒﺔ؛‬ ‫ﺒﺎﻟﻌﺠﻠﺔ‬ ‫ﺍﻟﻀﻐﻁ‬ ‫ﻭﺒﺎﺴﺘﺨﺩﺍﻡ‬ ‫ﺍﻟﺘﺩﺭﺝ‬ ‫ﻓﻲ‬ ‫ـﺔ‬ ‫ﺒﺎﻟﻤﻁﺭﻗــ‬ ‫ـﻐﻁﻬﺎ‬ ‫ﻀــ‬ ‫ـﺩ‬ ‫ﻋﻨــ‬ ‫ـل‬ ‫ﺍﻓﻀــ‬ ‫ـﺔ‬ ‫ﻨﻭﻋﻴــ‬ ‫ـﺩﺭﺝ‬ ‫ﺍﻟﺘــ‬ ‫ـﻲ‬ ‫ﻓــ‬ ‫ـﻭﺍﻗﺹ‬ ‫ﺍﻟﻨــ‬ ‫ﺫﺍﺕ‬ ‫ـﻔﻠﺘﻴﺔ‬ ‫ﺍﻻﺴــ‬ .