Problem: A test and process is also conducted to determine the asphalt content of the emulsified asphalt. A 300 grams of sample is poured in the iron still and heated to 250C for 15 minutes. The sample is then weighed after heating. The weights are as follows: a. Mass of iron still: 4008g b. Mass of iron still with sample after heating: 4198g

Problem: A test and process is also conducted to determine the asphalt content of the emulsified asphalt. A 300 grams of sample is poured in the iron still and heated to 250C for 15 minutes. The sample is then weighed after heating. The weights are as follows: a. Mass of iron still: 4008g b. Mass of iron still with sample after heating: 4198g

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter18: Bituminous Materials

Section: Chapter Questions

Problem 4P

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In a Marshall test, the percentage of asphalt binder by total weight of aggregate is 5.0%. The bulk specifc gravity of aggregate (G3)=2.624, the specifc gravity of asphalt binder (G)=1.000, and the density of water (Y)=1.000 g/cm³. If the absorbed asphalt (Pa) is 2.00% by total weight of aggregate, and the voids in total mixture (VTM) is 4.0%, determine the following properties: a. The effective asphalt content (Pbe) b. The bulk specifc gravity of the compacted mixture (Gmb) c. The voids in mineral aggregate (VMA) d. The theoretical maximum specifc gravity of the loose mixture (Gmm) e. The voids flled with asphalt (VFA) f. The effective specifc gravity of aggregate solids (G)
As part of mix design, a laboratory-compacted cylindrical asphalt specimenis weighed for determination of bulk-specific gravity. The following numbersare obtained:Dry mass in air = 1264.7 gramsMass when submerged in water = 723.9 gMass of saturated surface dry (SSD) = 1271.9 ga. What is the bulk-specific gravity of the compacted specimen (Gmb)?b. If the maximum theoretical specific gravity of the specimen (Gmm) is2.531, what would be the air void content of the specimen in percent?
Problem #1 The following figure shows the results from the dynamic modulus test for asphalt mixtures. The specimen is 4" in diameter and 6" in height. The gauge length for the axial LVDT is 4". Time lag is 0.25s. Find |E*I, and phase angle . Axial force(lbf) 65 60 40 20 0 -20 -40 -65 0 Dynamic modulus test result (gauge length = 4") 0.5 Time (second) 1 0.0010 0.0009 0.0006 0.0003 0 force (lbf) disp (in.) -0.0003 -0.0006 -0.0009 -0.0010 1.5 Axial displacement(in) 4"
As part of mix design, a laboratory-compacted cylindrical asphalt specimen is weighed for determination of bulk-specific gravity. The following numbers are obtained:Dry mass in air = 1264.7 gramsMass when submerged in water = 723.9 gMass of saturated surface dry (SSD) = 1271.9 ga. What is the bulk-specific gravity of the compacted specimen (Gmb)?b. If the maximum theoretical specific gravity of the specimen (Gmm) is 2.531, what would be the air void content of the specimen in percent?
An asphalt sample which is claimed to be AC- 20 is tested by an agency. Which test result will reject the sample O Viscosity at 60•C on original sample = 1850 Poise Ductility at 25C on TFO aged sample = 27 cm Penetration at 25 •C = 51 O Viscosity at 60 C on TFO aged sample = 11250 Poise
An aggregate blend for an asphalt concrete mixture has the following composition by weight: Coarse aggregate Fine aggregate 65% Specific (bulk) gravity of coarse agg. 35% Specific (bulk) gravity of fine agg. = 2.70 = 2.65 This aggregate blend was mixed with asphalt cement (G, =1.03) at an asphalt content of 5.5% by weight of mixture (ignore absorbed asphalt). A volumetric analysis was conducted and it was determined that the %VMA for the mix was 15.5%. Determine Gmb Of the mixture.
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An asphalt concrete specimen has the following properties:Asphalt content = 5.5% by total weight of mixBulk specific gravity of the mix = 2.475Theoretical maximum specific gravity = 2.563Bulk specific gravity of aggregate = 2.689 Ignoring absorption, calculate the percents VTM, VMA, and VFA.
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Softening point test 1- Is the point of softening equal to the melting point?2- If the softening point of the asphalt is greater than 150 m, what parts can be taken for the calculation of softening?3- Define the point of softening , explaining the conditions on which it depends
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Use the following volumetric relationships for asphalt mix analysis: VTM = 100 (1 - Gmb) VFA = 100 3. An asphalt concrete specimen has the following properties: Asphalt content = 5.5 % by total weigh of mix Bulk specific gravity of the mix = 2.475 Theoretical maximum specific gravity = 2.563 Bulk specific gravity of aggregate = 2.689 Assuming there is no absorption of binder, calculate the following: (a) Percent Voids in Total Mix (b) Percent Voids in Mineral Aggregate: VMA – VTM VMA (c) Percent Voids filled with asphalt: VMA = = (100 - Gmb Ps Gsb