Q2. A flexible pavement is to be designed based on AASHTO method. The following are the characteristics of this pavement: R = 90%, S0 = 0.40, Pi = 4.5, Pt = 2.0, SN = 3.5 and Mr (subgrade) = 15,000 psi. (a) If it was decided to use to a base course and an asphalt layer, what will be the thickness of each if you know that the sub-grade CBR = 8, base course CBR = 85, m = 1.0, surface modulus of elasticity = 400,000 psi. (b) How many years this pavement will approximately last, knowing that the average ESAL per year during the design period is 530 000 repetitions.

The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m³ and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m³ and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m³ and extend to the depth investigated at the site. The water table was detected at the top of the clay layer.

         The results of a consolidation test performed on a sample recovered from the mid point of the clay layer indicated the following properties for the clay:

1. Effective pre-consolidation pressure of 130 kPa;
2. Compression index C_c = 0.40;
3. Re-compression index C_r = 0.03; and
4. Consolidation coefficient C_v = 0.544 * 10^-2 cm²/sec.

The site is being proposed to be graded by compacting an additional layer.

The new compacted layer will impose a total stress increment of 75 kPa on the present ground surface. It is desired to obtain the following information:

1. Estimate the ultimate consolidation settlement due to grading;
2. Estimate the time in weeks that it will take to reach the average degree of consolidation U_ave= 90%; and
3. At the time calculated in 2.), estimate the excess pore pressure still present at the mid-point of the clay layer.

Design an I-section purlin for an industrial building to support the galvanized
corrugated iron sheet roof with following details:
Spacing of the truss = 5.0 meter
Spacing of purlins = 1.5 meters
Inclination of main rafter to horizontal = 30o
Weight of galvanized sheets with bolts etc = 130 N/m2
Imposed snow load = 1.5 kN/m2
Wind load = 1.0 kN/m2

1. To minimize the chance of losses, what process should a contractor use for updating the schedule, if litigation is expected?

2. Explain how prefabrication can change the critical path of a schedule.

3. For the ISU Chiller Plant, how did craft workers lift heavy items inside the plant?

"the recommended audience strength of churches should be two-third to get the optimum reverberation " Justify the above statement

who is the truest mockingbird in "To Kill a Mockingbird "?

How to calculate friction losses.
I. Write the calculation methods in detail by specifying the tables, abacs and diagrams used.
ii. Losses depend on what parameters.

can you please help this question. This is very importat to me pass the exam. Subject: Hydraulic for environmental engineering

Design a square interior column footing for a 15-in. square tied interior column that supports a dead load of 160 kips and live load of 180 kips. The column is reinforced with eight # 8 bars, also, the base of the footing is 6 ft below the grade line, the soil weight is 100 lb/ft3, the concrete weight is 150 lb/ft3, f’c = 4,000 psi, fy = 60,000 psi and qa = 4 kip/ft2.

You have to write a Descriptive Paragraph on Someone you know well. the paragraph should be between 150-200 words.

Note: Do not copy and paste from the internet. (avoid Plagiarism)

Exercise #

1. Analyze an actual project recently built in your area. Identify the major activities that occurred in each of the project phases and who accomplished them. Develop a flowchart or network diagram and present it to your class.

2. Class members should each examine a different local project and determine the following: • Project cost per square foot • Economic Life • Design-construction time • Income in dollars per square foot • Compare the viability of different project types at different interest rates.

Question: Using the data obtained from the uniaxial compressive strength test given below:

a. Find the average uniaxial compressive strength (UCS) and standard deviation.

b. Make UCS classification (ISRM, 1978).

Question: A cylindrical rock sample with a diameter of 54 mm in the uniaxial compressive strength test

It was broken by applying a force of 160.2 kN. Since the angle between the applied load direction and the breaking surface is 30 °, the stresses acting on the breaking surface;

(a) Solve using the Mohr diagram (graphic method).

(b) Solve by analytical method.

Design a concrete mix for the superstructure of a building using DoE mix design method requiring a characteristic strength of 40MPa at 28days and a slump of 30-60mm. The materials available are ordinary Portland cement, and uncrushed fine and coarse aggregates of specific gravity of 2.65. The maximum nominal size of coarse aggregate is 10mm and fine aggregate confirms to the grading zone III. Neglect the effect of standard deviation and other factors.

1. What are the suitable type of Excavations required to remove the layer of fine grained soil with a high clay content soil directly beneath the topsoil? Moreover, it is observed from the building design that foundations shall be constructed nearby to each other. In line with the requirements, recommend the safe and sustainable type of excavation along with the construction plant team suitable to construction site situation?

2. What is the suitable type of Foundation to build a G+3 storey building transforms heavy loads to the ground and it is desired to have minimum settlement? The building will be built in a fine grained soil with a high clay content soil, and the construction site is a residential area which may contain obstructions, and consists of adjacent structures and the construction method of foundation shall not develop any ground heave.

According to the ground stability and site circumstances, propose the most desirable construction method of the foundation and construction plant.

3. What are the suitable type of Super Structure for constructing G+3 residential buildings?

Considering this, recommend the most desirable, safe and sustainable construction method for the super structure based on the most common form of construction in Al Mabelah area In Sultanate of Oman.