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 cOorrections, 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 0.5 115 15 40 85 25-34 140 220 300 | 455 611 959 Penetration(mm) 2. 5 15 10 12.5 Load (Kg) 1120 1100 Table 2: MDD and CBR values for 10, 25 and 56 blows

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 cOorrections, 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 0.5 115 15 40 85 25-34 140 220 300 | 455 611 959 Penetration(mm) 2. 5 15 10 12.5 Load (Kg) 1120 1100 Table 2: MDD and CBR values for 10, 25 and 56 blows

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter18: Bituminous Materials

Section: Chapter Questions

Problem 4P

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CRITIC PATK o Na B: A coarse aggregate sample has been collected from a quarry to be used in a surface course asphalt mix, was tested in accordance to the Iraqi specification. The results are as shown below, is it comply with the specification and why? Test Property Percentage of wear, % Degree of crushing,% Flat and elongated pieces, % Soundness test with sodium sulfate, % Results 34 85 7 8
If needed assume the unit weight of water to be 62.4 lb/ft3 a) A HMAC sample has the following volumetric properties (i) VMA = 0.1865 ft3and (ii)Volume of air = 0.0452 ft3 Compute %VFA. b) A HMAC sample has 140 lbs of aggregate with a bulk specific gravity of 2.65 and aneffective specific gravity of 2.71. Based on this information the volume of the absorbedasphalt is ________________ft3A compacted sample of hot mix asphalt concrete sample has a unit weight of 135 lb/ft3.c) The sample has an asphalt content of 5% (by weight). Assume no absorbed asphalt.The bulk specific gravity of the aggregate is 2.65, and specific gravity for the asphaltcement is 1.05. Based on this information compute VMA for this mixture.
(c) Asphalt concrete mixture of AC 14 will be used to construct the wearing course layer. The coarse aggregate, fine aggregate and filler are used as materials to produce the asphalt concrete mixture. The aggregate gradation will be blended to fulfill the gradation limit according to JKR standard specification as shown in Table Q1(c)(i). Based on this statement, conclude the result of sieve analysis test of blended aggregate as shown in Table Q1(c)(ii). I Table Q1(c)(i): Gradation specification for AC 14 mixture BS Sieve Size (mm) Percentage passing by weight 28.0 20.0 14.0 10.0 5.0 3.35 1.18 0.425 0.150 0.075 100 90-100 76-86 50-62 40-54 18-34 12-24 6-14 4-8 I Act Go to
%CBR According to Iraqi Specification for different layers: Layers Compacted sub grade Sub-Base Base %CBR (lower limit) 4% 30% 35%
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 0.5 1 15 2. 15 40 85 140 220 300 455 611 959 Penetration(mm) 25-3 4 5 75 10 12.5 Load (Kg) 1120 1100 Table 2: MDD and CBR values for 10, 25 and 56 blows No. of Blows 10 25 56 MDD, gm/cm 1.95 2.07 2.2 CBR% 24 29 CBR% at 95% MDD
Based on the data shown in Table P9.31, select the blend for a Superpavedesign aggregate structure. Assume 60.3 million ESAL and 19 mm nominalmaximum aggregate size.
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 0.5 1 15 2. 15 40 85 140 220 300 | 455 611 Penetration(mm) 25-3 5 7.5 10 12.5 Load (Kg) 959 1120 1100 Table 2: MDD and CBR values for 10, 25 and 56 blows No. of Blows 10 25 56 MDD, gm/cm 1.95 2.07 2.2 CBR% 24 29 CBR% at 95% MDD
Qиestion no.08 The result of specific gravity test is given below Weight of saturated aggregate in water =618gm Weight of oven dry sample = 982 gm Weight of saturated surface dry aggregate = 990 gm (i) Calculate the specific gravity of aggregate?
25. M20 concrete is a grade of concrete which has a compressive strength equal to 20 MPa. I want to test if concrete with a raction of cement partially replaced with fly ash would be competftive with M20 concrete. What test should I perform given limited time and resources? O A. One sample t-test O B. One sample z-test O C. Two sample t-test D. Two sample z-test
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Students in the materials lab performed the specific gravity and absorption test (ASTM C127) on coarse aggregate and they obtained following data: a. Dry weight = 3862.1 g b. SSD weight = 3923.4 g c. Submerged weight = 2452.1 g 1. Calculate the specific gravity values (dry bulk, SSD, and apparent) and the absorption of the coarse aggregate. (Answer in 3 decimal places)
The following are the results in the test for specific gravity of fine aggregates:Mass of Oven-dried specimen in air = 502gMass of Pycnometer filled with water, to calibration mark = 640gMass of Saturated Surface Dry Specimen = 510gMass of Pycnometer filled with specimen and water to calibration mark = 950gCalculate the absorption, apparent specific gravity, bulk specific gravity in SSD condition, and bulk specific gravity in OD condition