LIST AT LEAST 3 CONCRETE ADMIXTURES THAT HAVE BEEN DEVELOPED IN THIS CENTURY (2000-2020), AND EXPLAIN:

                    a) Use or Application

                    b) Typical Dosage

                    c) Advantages

                    d) Disadvantages

Case study: Airport sustainability planning and design.

Airport chosen: Tokyo haneda airport.

Importance of sustainability on airport planning and design.

Write abstract and summary about the topic.

Case study: Impact of infrastructure system.

Topic chosen: japan bullet train ( shinkansen )

write an abstract and introduction about the topic given.

brief summary.

For a particular location the average net solar radiation is 6.65 MJ m^-2d^-1, the soil heat flux is 0.1R_n, the atmospheric temperature is 20⁰ C, the water surface temperature is 18⁰ C, and a pressure gage height of 2 m. Since this area is rather arid, the dryness coefficient is a little larger than normal, with a value of 1.33. Determine the open water evaporation rate in mm/day using the Priestley-Taylor method.

Describe the ASTM defined SPT test.

Review Question:
1. How do painters, sculptors or architects create different textures on their work?

2. Why is design important for an artist! For an observer?

Design a concrete mixture that has a 28 day compressive strength of 4000 psi and a maximum size aggregate of 0.75 in. The concrete would be placed in a column exposed to freezing and thawing and will be in contact with a soil that has a sulfate content of 0.3%.

Step 1: Assemble information from specifications and local materials

Cement:

Use any type and assume a specific gravity of 3.15

Coarse Aggregate:

Bulk Specific Gravity (BSG) – 2.65

Absorption Capacity – 1.5%

Surface Moisture – 1.0%

Dry-Rodded Unit Weight = 105 lb/ft^3

Fine Aggregate:

Bulk Specific Gravity (BSG) – 2.75

Absorption Capacity – 1.0%

Surface Moisture – 3.0%

Fineness Modulus – 2.7

Step 2: Select Slump

Step 3: Determine the maximum size of the aggregate

Step 4: Estimate the mix water and the air content

Step 5: Choose the water-to-cement ratio

Step 6: Determine the Cement Content

Step 7: Estimate the Coarse Aggregate Content

Step 8: Estimate the Fine Aggregate Content for a cubic yard

Step 9: Adjust for Moisture

Step 10: Summarize batch proportions in a table

Question 1

1. Calculate the Hydraulic Radius for a trapezoidal channel that has a bottom width of 4 feet, side slopes, s = 20, a Manning’s n value of 0.012, and bottom slope of 1.5%, and a depth of flow of 1 foot.

   	a.	0.54 ft
   	b.	1.3 ft
   	c.	2.1 ft
   	d.	2.9 ft
   	e.	3.7 ft

2 points

Question 2

1. A trapezoidal channel that has a bottom width of 4 feet, side slopes 2:1 (H:V) and bottom slope of 1.0%. Calculate the Froude Number for a flow of 77,000 GPM. Assume (n = 0.025).

   	a.	0.12
   	b.	0.35
   	c.	0.55
   	d.	0.77
   	e.	1.07

2 points

Question 3

1. A rough concrete (n = 0.018) rectangular channel that has a bottom width of 3.0 feet and bottom slope of 1.31%. Calculate the normal depth for a flow of 68 cfs.

   	a.	1.5 ft.
   	b.	2.0 ft.
   	c.	2.5 ft.
   	d.	3.0 ft.
   	e.	3.5 ft.

Describe (1)why the improved approaches for the site characterization is needed, and (2) key
characteristics of the improved approaches.

Workers’ compensation represents a compromise between the needs of employees and the needs of employers.

Question 2 (2 points)

Contributory negligence means that an employee knew that the job involved risk; he or she could not expect to be compensated when the risks resulted in accidents and injuries.

Question 3 (2 points)

There are three types of workers’ compensation insurance: state funds, private insurance, and self-insurance.

Question 4 (2 points)

Temporary disability:

Question 5 (2 points)

Which of the following is the whole-person theory of handling permanent partial disability cases?

Crane stability is one of the major concerns to construction managers when it comes to site safety. There are several factors involved with the safety that you as a manager need to carefully consider. List at least three factors associated with the crane safety or stability issue and briefly discuss each of the factors.

By now, you should have listened to the audio lecture, read the chapter, and taken the self-assessment and quiz. For this discussion activity, I want you to respond to the following question in the Discussion area in this learning module.

• Tower cranes have tall vertical, latticed masts or towers and horizontal booms called "jibs". There are several different types of jibs available for tower cranes. List at least three jibs and briefly describe each jib type.

By now, you should have listened to the audio lecture, read the chapter, and taken the self-assessment and quiz. For this discussion activity, I want you to respond to the following question in the Discussion area in this learning module.

• Clamshells are one of the special excavator types and sometimes clamshells are compared with draglines. List and discuss at least three different points between the two (Dragline vs. Clamshell) in terms of operations, productivity, etc. Do research on the internet, if necessary.