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 9.22QP
To determine
The Bulk specific gravity of the specimen.
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Questions 30 is based on the information below:
An asphalt concrete mix design has the following properties. The densities of the binder and aggregate
are 1.090 g/cm³ and 2.760 g/cm³, respectively. The bulk density of the entire mix is 2.220 g/cm³.
The percent binder content is 6.2% (by weight). Assume no absorption.
V₁= 1.0 cm³
Volume
Vv
Vb
Vs
AIR
Binder
Aggregate
Mass
Mb
Ms
Mt
30. As an engineer, you are asked to use this mix design for a 25 kilometer-long section of roadway where
the total pavement width is 8.0 meters and the thickness is 15 centimeters. What is the (a) total volume
of binder and (b) the total volume of aggregate that you would need to purchase? Also, determine the
(c) total %air voids in the mix.
An asphalt concrete specimen has a mass in air of 1327.8 g, mass in water
of 792.4 g, and saturated surface-dry mass of 1342.2 g. Calculate the bulk-specific gravity of the specimen.
6. The following table shows the gradation of two
aggregates A and B which are to be blended to
produce an acceptable aggregate for use in
manufacturing asphalt concrete for highway pavement
construction. If the required limits of gradation for
asphalt concrete are shown in the table below,
determine a suitable ratio for blending aggregates A
and B to obtain the acceptable combined aggregate.
Sieve Size
3/4 in. (19 mm)
3/8 in. (9.5 mm)
No. 4 (4.25 mm)
No. 10 (2 mm)
No. 40 (0.425 mm)
No. 200 (0.075 mm)
A
100
80
50
43
20
4
Percent Passing by Weight
B
98
76
45
33
30
8
Required
Mix
96 to 100
65 to 80
40 to 55
35 to 40
15 to 35
5 to 8
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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- An asphalt concrete specimen has a mass in air of 1327.8 g, mass in water of 792.4 g, and saturated surface-dry mass of 1342.2 g. Calculate the bulk specific gravity of the specimen. a. What is the bulkspecific 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?arrow_forwardDiscuss five different desirable characteristics of aggregate used in asphalt concrete.arrow_forwardIt is known that a concrete mix has 180 kg/m3 of water, 315 kg/m3 of sand. What is the coarse aggregate content in kg/m³, if the air content in the concrete is ignored? Assume the specific gravities of cement, fines, sand and coarse aggregate to be 3.15, 2.98, 2.64, and 2.74 respectively.arrow_forward
- The maximum theoretical specific gravity of an asphalt concrete is 2.550. Other components are specified as follows: Gmm =a.5s o Apparent Specific Gravity Gma Material Specific Gravity G % by Weight Asphalt cement Limestone dust 6.3 13.7 30.4 1.020 2.820 2.650 2.650 2.650 2.905 Sand Course aggregates 2.873 49.6 9. What is the bulk specific gravity of the aggregates? a) 2.73 b) 2.67 c) 2.69 d) 2.75 Gs b 10. What is the air void content if the bulk specific gravity is of the mixture is 2.340? a) 8.0% b) 8.5% c) 8.6% d) 8.2% 11. What is the effective specific gravity of the aggregates? а) 2.836 b) 2.816 c) 2.826 d) 2.866 12. What is the asphalt absorption? a) 1.90% b) 2.18/% c) 2.23% d) 2.13%arrow_forwardConcrete is required for a building foundation that is placed on a soil with high chloride content. The design calls for a minimum rebar spacing of 100 mm and a concrete cover of 75 mm. Which one of the following sizes is considered an acceptable nominal maximum size for aggregates? O A) 43 mm O B) 39 mm O9 28 mm O D) 49 mm A concrete pavement in Alberta will be exposed to freeze-thaw and de-icing salts during its service life. Which of the following exposure classes best describes the environmental conditions that the concrete will be exposed to? OA F-2 O B) A-2 O D) S-2 Strength of the normal weight concrete depends mainly on: OA) Strength of the aggregate O B) Mixing time OC) Purity of the mixing water O D) Water to cement ratio A fine broom finish is done only for aesthetic purposes. OA) True O B) False Oarrow_forwardAn asphalt concrete specimen has the following properties:asphalt content = 5.9% by total weight of mix bulk specific gravity of the mix = 2.457 theoretical maximum specific gravity = 2.598 bulk specific gravity of aggregate = 2.692Calculate the percents VTM, VMA, and VFA.arrow_forward
- 7. A sample of fine aggregate weighs 544 g when SSD and 530 g when OD. The flask weighs 654 g when filled with water and 985 g when filled with fine aggregate and water. Calculate the bulk specific gravity, apparent specific gravity, and absorption.arrow_forwardAn asphalt concrete specimen has the following properties:Asphalt content=5.3% by total weight of mixBulk specific gravity of the mix=2.442Theoretical maximum specific gravity=2.535Bulk specific gravity of aggregate=2.703Calculate the percents VTM, VMA, and VFA.arrow_forwardThe following information is available from a specific gravity test on coarse aggregate: wt of SSD CA = 6135 g wt of submerged CA = 3901 g wt of oven-dry CA = 6008 g Calculate the bulk specific gravity (SSD), bulk specific gravity, apparent specific gravity, and absorption (SSD) of the materialarrow_forward
- A portland cement concrete mix requires mixing sand having a gradationfollowing the midpoint of the ASTM gradation band (Table 5.4) and gravelhaving a gradation following the midpoint of size number 467 of the ASTMgradation band (Table 5.5) at a ratio of 2:3 by weight. On a 0.45 power gradation chart, plot the gradations of the sand, gravel, and the blend. Is the gradation of the blend well graded? If not, what would you call it?arrow_forwardA portland cement concrete mix requires mixing sand having a gradation following the midpoint of the ASTM gradation band and gravel having a gradation following the midpoint of size number 467 of the ASTM gradation band at a ratio of 2:3 by weight. On a 0.45 power gradation chart, plot the gradations of the sand, gravel, and the blend. Is the gradation of the blend well graded? If not, what would you call it?arrow_forward9.14 As a materials engineer working for a highway department, what standard PG asphalt binder grade would you specify for each of the conditions shown in Table P9.14 (show all calculations and fill in the table)? Table P9.14 Seven-Day Pavement Maximum Minimum Pavement Temperature, °C Temperature, °C Recommended PG Grade 50% 98% Case Mean, °C Std. Dev., °C Mean, °C Std. Dev., °C Reliability Reliability 1 43 1.5 - 29 2.5 2 51 -18 4 3 62 2.5 10 2arrow_forward
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