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An asphalt concrete mix has a density of 2370 kg/m3 at an asphlalt content of 5.8%. The asphalt absorption is 0.9%. The relative density of the aggregates is 2.67 and the relative density of the asphalt is 1.04. Assume the total mass to be 2370 kg.
Find the percents of air voids, VMA, and VFA.
Mass of binder, Mb = kg (write to one decimal place)
Mass of aggregate, Mg = kg (write to one decimal place)
Mass of absorbed binder, Mba = kg (write to one decimal place)
Volume of binder, Vb = m3 (write to THREE decimal places)
Volume of aggregate, Vg = m3 (write to THREE decimal places)
Volume of absorbed binder, Vba = m3 (write to THREE decimal places)
Volume of effective binder, Vbe = m3 (write to THREE decimal places)
Volume of air, Va = m3 (write to THREE decimal places)
Air voids, AV = % (write to one decimal place)
Voids in mineral aggregate, VMA = % (write to one decimal place)
Voids filled with asphalt, VFA = % (write to one decimal place)
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- Q. 3 a) Distinguish clearly between hot-mix asphalt and warm-mix asphalt. Why is the latter set to become the mix of the future in asphalt pavement works? b) Explain why asphalt concrete samples from the hot-mix plant are taken for compaction in the laboratory during asphalt overlay construction. c) The following data was taken from a laboratory work sheet on the design of asphalt concrete by the Superpave procedure for a selected aggregate structure: Trial Mix 1 %Gmm@Ndegn=96%, Qam=2470kg/m Trial Mix 2 P.=5.0%, Gmb@Nasgn=2.305 Based on the data, determine the following: i. P, of Mix 1 11. VMA of Mix 1 111. Gmm of Mix 2 Take Ga =2.65, G=2.69, for the aggregates and G,=1.02 for the bitumen used.arrow_forwardProblem No: 20%) 1. In a Marshall test, the percentage of asphalt binder by total weight of aggregate is 5.3%. The bulk specific gravity of aggregate (G) -2.582, the specific gravity of asphalt binder (G)=1.000, and the density of water (7)=1.000 g/cm If the voids filled with asphalt (VFA) is 70.0% and the effective asphalt binder (P) is 4.0% by total weight of mixture, determine the following properties(10%); a. The absorbed asphalt binder (P). b. The bulk specific gravity of the compacted mixture (G) c. The voids in mineral aggregate (VMA) d. The voids in total mixture (VTM). e. The theoretical maximum specific gravity of the loose mixture (G). f. The effective specific gravity of the aggregate (G). atical specific gravity of asphalt pavement mixture necessary for Nation 91% and Marshall Densityarrow_forward
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