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Question 41031

posted 1 years ago

6) (400 points) Type a 1–2-page memo describing the tests and results of the hardenedconcrete tests. Be sure to include the following:
a. A clear purpose/objective for the memo. (Hint: Whybeing tested?)are the concrete specimens
g. Give recommendations based on lab results.
b. Logical conclusions and recommendations based on the objective.
f. Specify if the hardened concrete mix meets the requirements of the design.
c. Follow the writing resource guidelines.
d. ALL tests and results
ALL necessary calculations and figures in the appendix.

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Question 41026

posted 1 years ago

1) (100 points) Use the test values obtained in lab to calculate the Compressive Strength,Modulus of Rupture, and Splitting Tensile Strength for the concrete. Create a table of the results that will be used in the body of the memo. Format the calculations for use in the attachments of the memo.

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Question 41027

posted 1 years ago

2) (100 points) What are requirements for the hardened concrete?engineering equations and the mix strength design.) Did the mix meet the requirements?(Hint: use the

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Question 41028

posted 1 years ago

3) (100 points) What is the objective/purpose of the concrete memo?

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Question 41029

posted 1 years ago

4) (100 points) What tests were performed to meet this objective?

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Question 41030

posted 1 years ago

5) (100 points) What are the recommendations for the concrete memo based on the objective and results (i.e., should the mix design be accepted or are changes to the mix design necessary?)

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Question 36656

posted 1 years ago

1.A contractor is planning to use a crawler tractor with power shift transmission to push 1,500LCY. The tractor must haul the loose material down an 8% slope, where it will be stockpiled for later removal. The contractor has measured the tractor blade load measurement: the pile length12.6 ft, the pile width 8.1 ft, and the pile height 4 ft. The tractor weighs 24,400 pounds, and the coefficient of traction is estimated to be 0.7. The average haul distance is estimated to be 300 ft.The job efficiency is 50 minutes per hour. Performance characteristics of the tractor are shown in the previous figure. (note: 1 mi/hr = 88 ft/min)
1) What is the estimated productivity of the tractor?
2) Estimate the total hours to complete the work.
3) Determine if the tractor can perform the work in the given condition above.

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Question 36657

posted 1 years ago

Estimate the production of a single-engine two-axle wheel scraper whose travel time curves are shown in the figures in the previous slides based on the following information.
Section 4. Up a 4% grade, 2000 ft for returning
Maximum heaped volume = 30 LCY
Maximum payload = 95000 lb
Job efficiency = 50 min/hr
Operating conditions = average
Haul road for a single pusher:
Section 1 Level loading area
Section 2. Down a 4% grade, 2000 ft for hauling
Material: Sandy clay, 3200 lb/BCY, and 2650 lb/LCY
Rolling resistance 100 lb/ton
Section 3. Level dumping area

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Question 36066

posted 1 years ago

The quantity of fly ash in Concrete Mix 4 should be limited to a maximum of 25% by mass of cementitious materials in accordance with ACI 318:
True
b) False

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Question 36063

posted 1 years ago

The applicable exposure classes for the Concrete Mix 3 are:
c) F3, 50, WO, C2
b) FO, 50, WO, CO
FO, 50, W1, Ci
d) F2, S1, WO, C1

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