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Question 42522

posted 11 months ago

S Referring to the aggregate gradations A, B, and C in Figure P5.25, answer the following questions:
a. What is the maximum size of each gradation?
b. What is the nominal maximum size of each gradation?
c. Classify each gradation as dense, open, or gap indičăting the each classification.

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Question 42524

posted 11 months ago

5 28 Three aggregates are to be mixed together in the following ratio:Aggregate A: 35%
together inAggregate A: 35%
Aggregate B: 40%
Aggregate C: 25%
Determine the percent passing each sieve for the blended aggregate.
For each aggregate, the percent passing a set of five sieves is shown in Table P5.28.Determine the percent passing each sieve for the blended aggregate.

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Question 42515

posted 11 months ago

SampleCoarse aggregate is placed in a rigid bucket and rodded with adetermine its unit weight. The following data are obtained:nping rod to
Volume of bucket1/3 ft%3D185 lb
Weight of empty bucket = 18.5lb
Weight of bucket filled with dry rodded coarse aggregate.
Calculate the dry-rodded unit weightaarogate iss 2.630, calc
If the bulk dry specific gravity of the aggregate is 2.630, calculate the percent voids in the aggregate.

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Question 42517

posted 11 months ago

46.5 kg (102.3 lb) of fine aggregate is mixed with 72.3 kg (159.1 lb) of coarse aggregate. The fine aggregate has a moisture content of 2.0% and absorption of 3.4%, whereas the coarse aggregate has a moisture content of 1.3% and
absorption of 3.8%. What is the amount of water required to increase the moisture contents of both fine and coarse aggregates to reach absorption?Why is it important to determine the amount of water required to increase the moisture content of aggregate to reach absorption? Use one system of units only as specified by the instructor.

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Question 42521

posted 11 months ago

A sieve analysis test was performed on a sample of aggregate and producedA sieve analysis test was performed on a sample of aggregate and prod.the results shown in Table P5.21..21
Calculate the percent passing through each sieve. Plot the percent passing versus sieve size on:
a. a semilog gradation chart, and
b. a 0.45 gradation chart (Figure A.25).What is the maximum size? What is the nominal maximum size?

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Question 42520

posted 11 months ago

A sieve analysis test was performed on a sample of fine aggregate and produced the following results:

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Question 42518

posted 11 months ago

5 Students in the materials lab performed the specific gravity and absorption test (ASTM C127) on coarse aggregate and they obtained following data:
Dry weight=3862.1
SSD weight=3923.4
Submerged weight=2452.1 gond
Calculate the specific gravity values (dry bulk, SSD, and apparent) and the absorption of the coarse aggregate.

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Question 42516

posted 11 months ago

A sample of wet aggregate weighed 297.2 N. After drying in an oven, this sample weighed 281.5 N. The absorption of this aggregate is 2.5%. Calculate the percent of free water in the original wet sample.

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Question 42514

posted 11 months ago

50 kg of gravel is mixed with 30 kg of sand. The gravel has a moisture content of3.9% and absorption of 4.7%, whereas the sand has a moisture content of 3.5%and absorption of 4.9%. What is the amount of water required to increase the moisture contents of both gravel and sand to reach absorption? Why is it important to determine the amount of water required to increase the moisture content of aggregate to reach absorption?

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Question 42525

posted 11 months ago

5.34 The mix design for an asphalt concrete mixture requires 2 to 6% minus No.200. The three aggregates shown in Table P.5.34 are available.
Considering that approximately equal amounts of coarse and intermediate aggregate will be used in the mix, what is the percentage of fine aggregate that will give a resulting minus No. 200 in the mixture in the middle of the range,about 4%?

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