Lecture No 6 Requirements for Asphalt Mix Asphalt

Lecture No. 6 Requirements for Asphalt Mix ﻣﺘﻄﻠﺒﺎﺕ ﺍﻟﺨﻠﻄﺔ ﺍﻹﺳﻔﻠﺘﻴﺔ ﺍﻟﺮﻛﺎﻡ ) ﺍﻟﻨﺎﻋﻢ ﻭ ﺍﻟﺨﺸﻦ ( ﻭ ﺍﻟﻤﻮﺍﺩ ﺍﻟﻤﺎﻟﺌﺔ ﻭ ﺍﻟﻤﻀﺎﻓﺎﺕ , ﺍﻹﺳﻔﻠﺖ -: ﺗﺘﻜﻮﻥ ﺍﻟﺨﻠﻄﺔ ﺍﻹﺳﻔﻠﺘﻴﺔ ﻣﻦ ﺍﻟﻤﻜﻮﻧﺎﺕ ﺍﻟﺘﺎﻟﻴﺔ (Asphalt, Aggregate (Fine, Coarse), Filler, Additive) 1. Stability: - resistance to; a-Permanent deformation due to shear strength b-Cracking deformation due to tensile strength c-Densification deformation due to compression strength - Good stability can be achieved using coarse aggregate with high crushing strength and angular shape - Stability is function of; i. Inter particle based on the a) Roughness of the surface particles, b) Inter angular contact pressure. i. Binder frictions; high enough viscosity to give as great a liquid friction. ﻗﺎﺑﻠﻴﺔ ﺍﻟﺨﻠﻄﺔ ﺍﻹﺳﻔﻠﺘﻴﺔ ﻟﻤﻘﺎﻭﻣﺔ -: ﺍﻻﺳﺘﻘﺮﺍﻳﺔ