a) The following data are available in a density-void analysis for Marshall method of mix design. Specific gravity: Coarse aggregate = 2.759 Fine aggregate = 2.905 Mineral filler = 2.699 Asphalt = 1.010 % by weight of total mix: Coarse aggregate = 51.45 Fine aggregate = 34.24 Mineral filler = 7.35 Asphalt = 6.96 Maximum specific gravity of paving mixture = 2.438 Bulk specific gravity of compacted mixture = 2.344 Calculate: Bulk specific gravity of the total aggregate, Effective specific gravity of the aggregate, Asphalt absorption of the aggregate, Voids in the mineral aggregate, Voids filled with asphalt, and Air voids in the compacted mixture.

a) The following data are available in a density-void analysis for Marshall method of mix design. Specific gravity: Coarse aggregate = 2.759 Fine aggregate = 2.905 Mineral filler = 2.699 Asphalt = 1.010 % by weight of total mix: Coarse aggregate = 51.45 Fine aggregate = 34.24 Mineral filler = 7.35 Asphalt = 6.96 Maximum specific gravity of paving mixture = 2.438 Bulk specific gravity of compacted mixture = 2.344 Calculate: Bulk specific gravity of the total aggregate, Effective specific gravity of the aggregate, Asphalt absorption of the aggregate, Voids in the mineral aggregate, Voids filled with asphalt, and Air voids in the compacted mixture.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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
Highway engineering civil engineering Question number (41)
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?
Determine the allowable number of repetitions N for an asphalt mix that has the design modulus of 3.2×10×106kPa. The load-induced tensile strain at the base of the asphalt beam specimen was 150με. Given, the percentage by volume of bitumen in the asphalt was 10.0, the laboratory to service life fatigue factor was 5, and the project had the desired reliability of 90%.
Given the following information from an asphalt mix: Gsb = 2.705 Gmm = 2.534 Gmb = 2.432 Gb = 1.014 Pb = 5.7% Unit weight of water = 62.4 Ib/ft3 Assume 1 ft for total volume. Draw mass/volume relationship and determine Mass of Mix (Mm) Ib., Mass of Binder (Mb) Ib., Volume of Binder (Vb) pcf, Volume of Void-less Mix (Vmm) Volume of Air (Va) pcf, Volume of Absorbed Asphalt (Vba) pcf, Volume of Effective Asphalt (Vbe) pcf. In addition, calculate Air Voids (VA) %, Voids in Mineral Aggregate (VMA) %, and Voids Filled with Asphalt (VFA)
5.29 Table P5.29 shows the grain size distribution for two aggregates and the specifi- cation limits for an asphalt concrete. Determine the blend proportion required to meet the specification and the gradations of the blend. On a semilog grada- tion graph, plot the gradations of aggregate A, aggregate B, the selected blend, and the specification limits. TABLE P5.29 Percent Passing Sieve Size, mm 12.5 9.5 4.75 2.36 0.60 0.30 0.15 0.075 19 Specification limits 100 80-100 70-90 50-70 35-50 18-29 13-23 8-16 4-10 Aggregate A 100 85 55 20 0. Aggregate B 100 100 100 85 67 45 32 19 11
Q- In a Marshall sample, the bulk specific gravity of mix and aggregates are 2.324 and 2.546 respectively. The sample includes 5% of bitumen (by total wt. of mix) of specific gravity 1.10. The theoretical maximum specific gravity of mix is 2.441. Find the void filled with bitumen (VFB) in the Marshall sample (in %).
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coarse aggregate with a nominal maximum size of 2 inches and dry rodded density of 110 lb/ft3 will be used in a trial mix design. determine the coarse aggregate content in pounds per cubic yard required if the fine aggregate fineness modulus is 2.50.
Q- In a Marshall sample, the bulk specific gravity of mix and aggregates are 2.324 and 2.546 respectively. The sample includes 5% of bitumen (by total weight of mix) of specific gravity 1.10. The theoretical maximum specific gravity of mix is 2.441. The void filled with bitumen (VFB) in the Marshall sample (in %) is
Q.1) Justify the following: a- Surface texture of aggregate affects the workability of concrete mixture. b- The aggregate sample has to be air-dried before the sieve analysis is performed. c- The problem of clay coatings in aggregate is an important one.
In a Marshall sample, the bulk specific gravity of mix and aggregates are 2.424 and 2.644 respectively. The sample includes 7% of bitumen (by total weight of mix) is having specific gravity of 1.10. The theoretical maximum specific gravity of mix is 2.563. The void filled with bitumen (VFB) in the Marshall sample (in %) is