Answered: When performing a sieve analysis test,…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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5.14 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 = ¹/2 ft³ Weight of empty bucket = 20.3 lb Weight of bucket filled with dry rodded coarse aggregate: Trial 176.6 lb Trial 275.1 lb Questions and Problems 217 Trial 3 78.8 lb a. Calculate the average dry-rodded unit weight b. If the bulk dry specific gravity of the aggregate is 2.620, calculate the percent voids between aggregate particles for each trial.
CapsL 8 A Determine the range of final gradation of selected aggregates to prepare the job mix formula for binder course of a mixing plant according to data indicated in table below? Use the following tolerances: ± 6 % for 4.75 mm and above aggregate sizes, ± 4% for 2.36 and 0.30 mm aggregate sizes, and ± 2 % for 0.075 mm aggregate size. Note: use first try with 30%, 35%, 30% and 5% for groups A, B, C and D, respectively. Sieve Size 25 19 12.5 9.5 4.75 2.36 0.3 0.075 A (30%) Coarse Aggregate 100 99 56 31 4 0 0 0 % Passing B (35%) Natural Sand 100 100 100 100 100 89 15 4.2 C (30%) Crushed Sand 100 100 100 100 92 56 9 5 D (5%) Filler 100 100 100 100 100 100 97 88 Specification 100 90-100 76-90 56-80 35-65 23-49 5 19 39 Job Mix Formula Job Mix Formula Limitation 13.6
The mass of the aggregates to be tested in Los Angeles Abrasion Machine is 10,000g, what is the % abrasion if the mass of the aggregate retained in No. 12 Sieve is 8435.9g? a 18.5% b 16.0% c 15.2% d 17.3%
Three samples of fine aggregate were taken from the same stockpile and have the properties shown below. Determine in percentage: (a) total moisture content of each sample, (b) free moisture content of each sample, and (c) the average values of each from the stockpile. Measure Wet Mass (g) Dry Mass (g) Absorption (%) A 521.0 491.6 2.5 Sample B 522.4 491.7 2.4 C 523.4 492.1 2.3
5) Determine the apparent specifie gravity (G.), dry bulk specific gravity (Guon), SSD bulk specific gravity (Ghessn) and absorption capacity of a fine aggregate sample using the folowing data: • Weight of sample in dry condition: 485 g Weight of sample in SSD condition: 505 g • Weight of pyenometer with the sample and water: 1015 g • Weight of pycnometer with water: 700 g
I) Two aggregates (Al and A2) were obtained from the field. A sieve analysis was performed on each sample, and the samples (originally 500g in mass) were brought to the oven dry condition (OD) and weighed. Data was obtained for each of the aggregates and is presented in the tables below. (Density of water-1g/cm) Table 1. Results from sieve analysis. Sieve Size Opening (mm) Weight of Aggregate retained (g) A1 A2 3/8" 9.5 No. 4 4.75 65 No. 8 2.36 60 25 No. 16 1.18 100 396 No. 30 0.6 50 No. 50 0.3 118.5 10 No. 100 0.15 75 15 Pan 75 Table 2. Absorption capacity and moisture content data. Al A2 500 g 500 g Field Weight Oven Dry Weight Absorption Capacity (%) 0.7 % 498.5 g 496 g 0.6 % a) Plot the grading curve for each aggregate (x-axis: sieve opening, y-axis: %passing). (Note: In the grading curves, you must show all data points. You can draw the gradation chart using excel or by hand. If you draw by hand, you have to use a ruler. The format of the gradation chart should be same as in the…
In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 27.6 MPa. The compressive strength data shown in Table P7.48 were collected. Use one system of units only as specified by the instructor. a. Calculate the mean, standard deviation, and the coefficient of variation of the data.b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was at 42.0 MPa. The following compressive strength data were collected: All in Mega-Pascal (MPa) 41.8, 38.3, 42.5, 39.6, 42.5, 39.3, 41.2, 40.9, 39.8, 41.6 42.9, 43.4, 39.9, 44.7, 45.1, 43.9, 42.4, 41.7, 41.1, 42.1 Calculate the Arithmetic Mean, Median, and Standard Deviation. (Non-anonymous question@) .
7. Make a spread sheet blend template program to perform a blend gradation analysis for up to four stockpiles with the ability to produce automatically semilog or power 0.45 gradation charts. Use the table to demonstrate the template, and calculate the fineness modulus for the aggregate D. Aggregate Blend Percent (%) Sieve size (mm) 37.5 25 19 12.5 9.5 4.75 2.36 1.18 0.60 0.30 0.15 0.075 A 20 100 100 95 89 70 10 2 N|N 2 2 2 2 2 B 25 100 100 100 100 82 55 15 55 32 2 1 с 25 Percent Passing 100 100 100 100 100 100 69 55 35 22 15 6 D 30 100 100 100 100 100 100 86 54 34 25 14 5
Why is it necessary to dry aggregates prior to sieve analysis?

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When performing a sieve analysis test, the sample is placed in a sieve shaker for a time of __________ minutes?