Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 9, Problem 9.37QP
To determine
The optimum asphalt content using the Asphalt Institute design criteria.
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The Marshall method was used to design an asphalt concrete mixture. A PG 64-22 asphalt cement with a specific gravity (Gb) of 1.031 was used. The mixture contains a 9.5 mm nominal maximum particle size aggregate with a bulk specific gravity (Gsb) of 2.696. The theoretical maximum specific gravity of the mix (Gmm) at asphalt content of 5.0% is 2.470. Trial mixes were made with average results as shown in the following table:Determine the design asphalt content using the Asphalt Institute design criteria formedium traffic Table . Assume a design air void content of 4% when usingTable
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?
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?
Chapter 9 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 9 - Prob. 9.1QPCh. 9 - Prob. 9.2QPCh. 9 - Prob. 9.3QPCh. 9 - Prob. 9.4QPCh. 9 - Prob. 9.5QPCh. 9 - Prob. 9.6QPCh. 9 - Prob. 9.7QPCh. 9 - What are the engineering applications of each of...Ch. 9 - Prob. 9.9QPCh. 9 - Prob. 9.10QP
Ch. 9 - Prob. 9.11QPCh. 9 - Prob. 9.12QPCh. 9 - Prob. 9.13QPCh. 9 - Prob. 9.14QPCh. 9 - Prob. 9.15QPCh. 9 - Prob. 9.16QPCh. 9 - Prob. 9.17QPCh. 9 - Prob. 9.18QPCh. 9 - What are the objectives of the asphalt concrete...Ch. 9 - Prob. 9.20QPCh. 9 - Prob. 9.21QPCh. 9 - Prob. 9.22QPCh. 9 - Prob. 9.23QPCh. 9 - Prob. 9.24QPCh. 9 - Prob. 9.25QPCh. 9 - An asphalt concrete mixture includes 94% aggregate...Ch. 9 - Prob. 9.27QPCh. 9 - Prob. 9.28QPCh. 9 - Prob. 9.29QPCh. 9 - Prob. 9.30QPCh. 9 - Based on the data shown in Table P9.31, select the...Ch. 9 - Based on the data in Table P9.32, determine the...Ch. 9 - Given the data in Table P9.33, select the blend...Ch. 9 - The Marshall method of mix design has been widely...Ch. 9 - Prob. 9.35QPCh. 9 - Prob. 9.36QPCh. 9 - Prob. 9.37QPCh. 9 - Prob. 9.38QPCh. 9 - Prob. 9.39QPCh. 9 - Prob. 9.40QPCh. 9 - Prob. 9.41QPCh. 9 - Prob. 9.42QPCh. 9 - Prob. 9.43QPCh. 9 - What is the purpose of adding fly ash to asphalt...Ch. 9 - Prob. 9.45QPCh. 9 - Prob. 9.47QPCh. 9 - Prob. 9.48QP
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- Determine the percentage of voids filled with asphalt for a paving mixture with relative compaction equal to 96%. Asphalt content is 5.5% by total mix content and with specific gravity=1.03. The bulk specific gravity of the combined aggregate is 2.67. The maximum theoretical specific gravity of the mixture 2.48. The weight and volume of Marshall specimen = 1200g and 482. cm³ respectively.arrow_forwardTable 3 lists data used in obtaining a mix design for an asphalt paving mixture. If the maximumspecific gravity of the mixture is 2.41 and the bulk specific gravity is 2.35, determine: (a) thebulk specific gravity of aggregates in the paving mixture, (b) the asphalt absorbed, (c) theeffective asphalt content of the paving mixture, and (d) the percent voids in the mineralaggregate VMAarrow_forwardAn aggregate blend is composed of 59% coarse aggregate by weight (Sp. Gr.2.635), 36% fine aggregate (Sp. Gr. 2.710), and 5% filler (Sp. Gr. 2.748). The compacted specimen contains 6% asphalt binder (Sp. Gr. 1.088) by weight of total mix and has a bulk density of 143.9 lb/ft3 Ignoring absorption, compute the percent voids in total mix, percent voids in mineral aggregate, and the percent voids filled with asphalt.arrow_forward
- 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%.arrow_forwardAn aggregate blend is composed of 65% coarse aggregate by weight (SG 2.65), 30% fine aggregate (SG 2.70), and 5% filler (SG 2.75). The compacted specimen contains 6% asphalt binder (SG 105) by weight of total mix, and has a bulk densit of 2.255 Mg/m&3. Ignoring absorption.a. What is the percent voids fill with asphalt?b. What is the percent voids in mineral aggregates?c. What is the percent voids in total mix?arrow_forwardAn aggregate blend is composed of 59% coarse aggregate by weight (Sp. Gr.2.635), 36% fine aggregate (Sp. Gr. 2.710), and 5% filler (Sp. Gr. 2.748). Thecompacted specimen contains 6% asphalt binder (Sp. Gr. 1.088) by weight oftotal mix and has a bulk density of 2305 kg/m3. Ignoring absorption, compute the percent voids in total mix, percent voids in mineral aggregate, and the percent voids filled with asphalt.arrow_forward
- The table below lists data used in obtaining a mix design for an asphalt paving mixture. If themaximum specific gravity of the mixture is 2.41 and the bulk specific gravity is 2.35,Determine:(a) the bulk specific gravity of aggregates in the mix(b) the asphalt absorbed (c) the effective asphalt content of the paving mixture(d) the percent voids in the mineral aggregate VMAarrow_forwardQ1 (c) In a Marshall test, the percentage of asphalt binder by total weight of aggregate is 5.26%. The bulk specific gravity of aggregate (Gsb) = 2.455, the specific gravity of asphalt binder (Gb) = 1.020, and the density of water (yw) = 1.000 g/cm^3. If 1 m^3 of an asphalt concrete mixture will be produce that having 2000 g and the asphalt absorbed into the aggregate is 24 gram : (i) Calculate asphalt content, effective asphalt content and asphalt absorption. (ii) Calculate void in mineral aggregate and void filled with asphalt.arrow_forwardIn 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)arrow_forward
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