فحوصات الاسفلت
الاسفلت من الآلف الى التاء. 1) Soften the bitumen above the softening point by heating it between 75 and 100 oC. 2) Remove air bubbles and water by stirring the softened sample thoroughly. 3) Make sure bitumen should be just sufficient to fill the container to a depth of at least 15mm in excess of the expected penetration.