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 9.6QP
To determine
The relationship between asphalt viscosity and temperature for the following cases.
- a) A low temperature susceptible and
- b) A high temperature susceptible asphalt
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Temperature has a large effect on the asphalt viscosity. On one graph, plot the relationship between asphalt viscosity (logarithmic) and temperature for two cases: (a) a low-temperature susceptible asphalt and (b) a high-temperature susceptible asphalt. Label all axes and relations.
Temperature has a large effect on the asphalt viscosity. Plot a typical (qualitative) relationship between asphalt viscosity (logarithmic) and temperature for two cases: (a) a low-temperature susceptible asphalt and (b) a high-temperature susceptible asphalt.
Electromagnetic technologies offer effective nondestructive sensing techniques for determining characteristics of pavement. The propagation of electromagnetic waves through thematerial depends on its dielectric properties. The following data, kindly provided by the authorsof the article “Dielectric Modeling of Asphalt Mixtures and Relationship with Density” (J. ofTransp. Engr., 2011: 104–111), was used to relate y = dielectric constant to x = air void (%) for18 samples having 5% asphalt content:
y <- c(4.55, 4.49, 4.50, 4.47, 4.47, 4.45, 4.40, 4.34, 4.43, 4.43, 4.42, 4.40, 4.33, 4.44, 4.40, 4.26, 4.32, 4.34)x <- c(4.35, 4.79, 5.57, 5.20, 5.07, 5.79, 5.36, 6.40, 5.66, 5.90, 6.49, 5.70, 6.49, 6.37, 6.51, 7.88, 6.74, 7.08)(a) Obtain the equation of the least squares line and interpret its slope.1(b) What proportion of observed variation in dielectric constant can be attributed to the approximate linear relationship between dielectric constant and air void.(c) Does there appear to be…
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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- 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"arrow_forwardProblem: 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: 4198garrow_forwardQuestions 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.arrow_forward
- Identify the following statement whether it is (True) or (False). If your answer is false, give the correct answer? 1- Dowel bars are generally provided across longitudinal joints of rigid pavement. 2- The migration of asphalt cement to the surface of the pavement under wheel loads especially at high temperatures is called stripping. 3- The lower the penetration of asphalt binder, the softer the asphalt binder. 4- We need to keep the aggregate for 24 hours in an oven at 105°C to obtain the aggregate dry weight. 5- It is important to design thicker layers of asphalt if the subgrade materials are not strong enough to withstand expected loads during their life cycle. 6- The medium curing asphalt is produced by blending asphalt with diesel oil.arrow_forwardWhat are the organic substances in the production of warm asphalt? Please explain with reference.arrow_forwardList the typical four types of materials in pavement engineering and describe the three basic structures of asphalt mixture in civil engineering.arrow_forward
- Binder grade of asphalt selected for a highway construction based on the temperature recordsfound to be PG70-16. Answer to the following questions:• If traffic speed is high (more than 70 km/h) and 0.2 million ESAL, what is your suggestionfor the binder grade?• If traffic speed is slow (less than 20km/h) and traffic volume is very high (40 million EASL), what is your suggestion for the binder grade?arrow_forwardAs 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 Maximum Pavement Temperature Minimum Pavement Recommended Temperature PG Grade Standard 98% Mean, °C Deviation, °C Reliability Reliability Standard 50% Case Mean, °C Deviation, °C 1 43 1.5 -29 2.5 2 51 -18 4 62 2.5 10arrow_forwardBriefly describe the process of distillation by which asphalt cement is produced from crude petroleum. Also, describe in detail how you would obtain asphalt binders that can be used to coat highly siliceous aggregatesarrow_forward
- 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 P9.15 (show all calculations and fill in the table)? TABLE P9.15 Seven-Day Maximum Pavement Temperature Minimum Pavement Recommended Temperature PG Grade Standard Standard 50% 98% Case Mean, °C Deviation, °C Mean, °C Deviation, °C Reliability Reliability 1 39 -32 3.5 54 1.5 -17 2 3 69 2.5arrow_forwardState four different asphalt modifiers that can be added to asphalt or asphalt mixtures, and indicate the effect of each.arrow_forwardQ4) Determine the PG grade of the asphalt whose results are shown in the table below? Show all calculations and comparisons with Superpave requirements. Test Results Original Properties Flash point temperature, °C 278 Viscosity @ 135 °C 0.490 Pa.s Dynamic shear Rheometer @ 82 °C @ 76 °C G* = 0.82 kPa, 8 = 68° G* = 1.00 kPa, 8 = 64° @ 70 °C G* = 1.80 kPa, 8 = 60° Rolling Thin Film Oven Aged Binder Mass loss, % 0.63 Dynamic shear Rheometer @ 82 °C @ 76 °C G* = 1.60 kPa, 8 = 65° G* = 2.20 kPa, ô = 62° @ 70 °C G* = 3.50 kPa, 8 = 58° Rolling Thin Film Oven and PAV Aged Binder Dynamic shear Rheometer @ 34 °C @ 31 °C @ 28 °C G* = 2500 kPa, 8 = 60° G* = 3700 kPa, 8 = 58° G* = 4850 kPa, 8 = 56° Bending Beam Rheometer @ -6 °C, 60-sec @ -12 °C, 60-sec @ -18 °C, 60-sec S = 255 MPa, m = 0.329 S = 290 MPa, m = 0.305 S = 318 MPa, m = 0.277arrow_forward
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