Question Two: The laboratory test data for a modified Proctor test and CBR test for (crushed limestone) are given below; Find the CBR value at 95% of MDD after necessary corrections, for the tested sample depending on Iraqi Specifications, R6 (after drawing the curve and stating your answer about which sort of sub-bases materials are used in highway construction? Table 1: CBR test data @56 blows 56 Blows Penetration (mm) 0 0.5 1 1.5 2 25 34 5 75 10 12.5 Load (Kg) 0 15 40 85 140 220 300 455 611 959 1120 1100 Table 2: MDD and CBR values for 10, 25 and 56 blows No. of Blows 10 25 56 MDD, gm/cm³ 1.95 2.07 2.2 CBR% 24 29 ? CBR% at 95% MDD ?

Question Two: The laboratory test data for a modified Proctor test and CBR test for (crushed limestone) are given below; Find the CBR value at 95% of MDD after necessary corrections, for the tested sample depending on Iraqi Specifications, R6 (after drawing the curve and stating your answer about which sort of sub-bases materials are used in highway construction? Table 1: CBR test data @56 blows 56 Blows Penetration (mm) 0 0.5 1 1.5 2 25 34 5 75 10 12.5 Load (Kg) 0 15 40 85 140 220 300 455 611 959 1120 1100 Table 2: MDD and CBR values for 10, 25 and 56 blows No. of Blows 10 25 56 MDD, gm/cm³ 1.95 2.07 2.2 CBR% 24 29 ? CBR% at 95% MDD ?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter19: Design Of Flexible Highway Pavements

Section: Chapter Questions

Problem 4P

See similar textbooks

Similar questions

Standard Test Method for Ductility of Bituminous Materials 3- Why is the pan greased before pouring the sample4- What causes distortions in the roads?
After 2 years of traffic, cores were recovered from the roadway which has severe rutting and bleeding. The bulk specific gravity and the maximum theoretical specific gravity were measured on these cores and are as follows:a. Bulk specific gravity = 2.487b. Maximum theoretical specific gravity = 2.56 1 c. Calculate the air voidsd. If the design air void content was 4%, explain what effect the calculated air voids had on the rutting and bleeding noted.
QueAfter two years of traffic, cores were recovered from the roadway which has severe ruttingand bleeding. The bulk specific gravity and the maximum theoretical specific gravity weremeasured on these cores and are as follows:Bulk specific gravity = 2.487Maximum theoretical specific gravity = 2.561a. Calculate the air voidsb. If the design air void content was 4%, explain what effect the calculated air voids hadon the rutting and bleeding noted.
A concrete beam sample has a width of 5 inches, a depth of 6 inches, and a length of 20 inches. The sample was tested for ASTM C293. The maximum load carried by the sample after its failure is 95 KN. Determine the modulus of rupture of the sample in psi. (use 1lbf = 4.45 N, round-up your answer to the nearest whole number that is divisible by 5, no need for unit)
Q#4: Discuss the following terms briefly: Emulsion breaking and Cutback curing, Water bound and aggregate base, Flexible pavement and Rigid pavements, Cross slope and side slope of road, Slope camber and barrel camber, Perception time and reaction time, Breast wall and retaining wall. Subject: Transportation engneering 2 Note : plz give me to the point answer
Sieve analysis of a sample of fine aggregate resulted in the following data No. Sieve number 4 8 16 30 50 100 Sieve opening (mm) 4.75 2.36 1.18 0.6 0.3 0.15 Weight retained (g) 13 75 120 126 105 61 A) The total weight of the sample, assuming no mass loss during the analysis, is______ (g) a) 505; b) 500; c) 550 B) The half sieve used in the experiment is________. a) No.8; b) No.50; c) none of the above C) The fineness modulus of the aggregate________. a) 6.13; b) 3.16; c) 1.36 D) The average size of the aggregate___________. a) No.30; b) No.4; c) No.16
After two years of traffic, cores were recovered from the roadway which has severe rutting and bleeding. The bulk specific gravity and the maximum theoretical specific gravity were measured on these cores and are as follows: Bulk specific gravity = 2.561 Maximum theoretical specific gravity = 2.487 a.) Calculate the air voids b.) If the design air void content was 4%, explain what effect the calculated air voids had on the rutting and bleeding noted. Show Clear Solution.
Coarse aggregate is placed in a rigid bucket and rodded with a tamping rod to determine its unit weight. The following data are obtained: Volume of bucket = 9.3 Liters Mass of empty bucket = 9 kg Mass of bucket filled with dry-rodded coarse aggregate: Trial 1 = 30.25 kg Trial 2 = 29.76 kg Trial 3 = 31.12 kga. Calculate the individual dry-rodded unit weight for each trial and the average dry-rodded unit weight of all trials.b. If the bulk dry specific gravity of the aggregate is 2.65, calculate the percent voids between aggregates particles for each trial and the average percent voids of all trials.
In order to check the quality of the stockpile of aggregates, 1 sack of aggregates (around 40 kg) was taken from the stockpile and then returned to the laboratory. From a visual inspection of the stockpile, it consists mostly of sand particles mixed with a few gravel aggregates of not more than 1” in size (diameter). After the laboratory test, it was reflected in the report that the stockpile is dominated by gravels. This report contradicts the initial visual inspection that was conducted on the field. Do you think there were discrepancies along the way? If so, where do you think such discrepancy occurred? How do you resolve this contradicting events?
Coarse aggregate is placed in a rigid bucket and rodded with a tamping rod to determine its unit weight. The following data are obtained:Volume of bucket = 14 LWeight of empty bucket = 9.21 kgWeight of bucket filled with dry rodded coarse aggregate:Trial 1 = 34.75 kgTrial 2 = 34.06 kgMeasureSampleA B CWet Mass (g) 521.0 522.4 523.4Dry Mass (g) 491.6 491.7 492.1Absorption (%) 2.5 2.4 2.3Table P 5 . 9 determine the amount of water required to increase the moisture content of aggregate to reach absorption?5.9 Three samples of fine aggregate have the properties shown in Table Trial 3 = 35.74 kga. Calculate the average dry-rodded unit weightb. If the bulk dry specific gravity of the aggregate is 2.620, calculate thepercent voids between aggregate particles for each trial.
Recommend and justify the potential usage of AR with BIM in construction
Given the following data for liquefaction analysis. Determine the factor of safety for a 7.5 earthquake and 6.0 magnitude earthquake.