Concept explainers
The following laboratory tests are performed on aggregate samples:
a. Specific gravity and absorption
b. Soundness
c. Sieve analysis test
What are the significance and use of each of these tests?
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- Complete the table and show complete computations. Draw the aggregate gradation chart. Calculate the fineness modulus for fine aggregate.arrow_forwardStudents 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)arrow_forwardA sieve analysis test was performed on a sample of coarse aggregate and produced the following results:a.) Calculate the percent passing through each sieve.b.) What is the maximum size?c.) What is the nominal maximum size?arrow_forward
- Establish the differences between the wear test performed on aggregates smaller than 3/4 "and the wear test performed on aggregates larger than 3/4"arrow_forwardA sieve analysis test was performed on a sample of coarse aggregate and produced the results in Tablea. Calculate the percent passing through each sieve.b. What is the maximum size?c. What is the nominal maximum size?d. Plot the percent passing versus sieve size on a semilog gradation chart.e. Plot the percent passing versus sieve size on a 0.45 gradation chart.f. Referring to Table (ASTM C33), what is the closest size number anddoes it meet the gradation for that standard size?arrow_forward2) Sieve analysis results of a fine and a coarse aggregate are given in the tables below. For the determination of their specific gravities and water absorption capacities, the relevant measurement results of tests are also given in the tables. Draw the gradation curves of the fine and coarse aggregate separately. Calculate the fineness modulus of fine aggregate. Calculate the specific gravity and water absorption capacity of fine and coarse aggregate for oven-dry (OD) and saturate-surface dry (SSD) conditions. Sieve analysis results for COARSE AGGREGATE: Sieve Opening Weight Retained, (mm) 25.0 19.0 400 12.5 1400 9.50 2160 1/2 Sieve analysis results for FINE AGGREGATE: Sieve Opening (mm) Weight Retained, 4.75 2.00 950 0.85 2000 0.425 1010 0.25 670 Pan 143arrow_forward
- Three samples of fine aggregate have the properties shown in Table. Determine in percentage: (a) total moisture content and (b) free moisture content for each sample and the average of the three samples.arrow_forwardThe table below presents the results of the sieve analysis conducted on a sample of aggregate. Given the bulk specific gravities of 2.65 for coarse aggregate, 2.69 for fine aggregate, and 2.73 for filler, determine the bulk density of the aggregate sample. Additionally, calculate the maximum aggregate size and nominal aggregate maximum size. Sieve size (mm) 37.5 % Passing 100 Specification limit 25 92 100 90-100 19 83 76-90 12.5 9.5 4.75 2.36 0.3 71 62 53 32 15 56-80 48-74 29-59 19-45 5-17 0.075 4 2-8arrow_forward2.638, 2.514, 2.437 O 2.651, 2.472, 2.364arrow_forward
- TEST PROCEDURE: 1. Dry the aggregate test sample to a constant weight at a temperature of 110 ± 5°C, then cool to room temperature. 2. Select suitable sieve sizes to furnish the information required by the specifications covering the material to be tested. Common sieves in millimeters are 37.5, 25, 19, 12.5, 9.5, 4.75, 2.36, 1.18, 0.6, 0.3, 0.15, and 0.075 mm (11 2 in., 1 in., 3 4 in., 1 2 in., 3 8 in., No. 4, No. 8, No. 16, No. 30, No. 50, No. 100, and No. 200). 3. Nest the sieves in order of decreasing size of opening, and place the aggregate sample on the top sieve. 4. Agitate the sieves by hand or by mechanical apparatus for a sufficient period. The criterion for sieving time is that, after completion, not more than 1% of the residue on any individual sieve will pass that sieve during 1 minute of continuous hand sieving. 5. Determine the weight of each size increment. 6. The total weight of the material after sieving should be compared with the original weight of the sample placed…arrow_forwardComplete the table and show complete computations. Draw the aggregate gradation chart. Calculate the fineness modulus for fine aggregates. Complete the table and show complete computations. Draw the aggregate gradation chart. Calculate the fineness modulus for coarse aggregates.arrow_forwardSpecific Gravity and Absorption of Coarse Aggregates What are the possible discussion of observations for specific gravity and absorption of aggregate to observed values?arrow_forward
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