3. Two triaxial tests are performed on a clay. At failure, the results are:

Test 1: σ₃ = 30 kPa, P = 0.45 kN, A = 0.01 m², u = 10 kPa

Test 2: σ₃ = 60 kPa, P = 0.70 kN, A = 0.01 m², u = 20 kPa

1. Find σ₁, σ₃, σ'₁, and σ'₃ at failure for both tests.
2. Draw the effective stress Mohr's circle for both tests and draw the Mohr-Coulomb failure envelope for the clay. What are f' and c' for the clay? Write the equation for the Mohr-Coulomb failure envelope.
3. Is the clay normally consolidated or over consolidated? Why?

Assignment will be prepared on any issue (It is up to you) concerning occupational health and safety and your professional field. For example

If you are a Civil Engineering student; investigate and report the relationship between occupational health and safety and construction Works.

approximately 5 pages document.

i need a report 5 page for relationship between occupational health and safety with civil engineering field

(a) DESCRIBE the reasons why concrete has to be pre-stressed before use as a load-bearing beam. [3 MARKS]

(b) EXPLAIN with DIAGRAMS how pre-stressed concrete is made. [5 MARKS]

(c) EXPLAIN why pre-stressed concrete loses its strength when subjected to excessive heat from a fire. [2 MARKS]

Describe the process of producing GFRC panels, illustrating your account with simple sketches.?

A 12 in. x 18 in. rectangular beam has an effective span of 20 ft. A dead load of 1500 lb/ft (includes self weight) and a live load of 4000 lb/ft is applied to the beam. The concrete and steel strengths are 4000 psi and 60000 psi respectively. Design and detail the shear reinforcement for the beam. Assume d is 2 inches less than h

Que 1: a. Describe four different materials used for curing.

            b. Explain how ponding curing different from wet covering curing

C. Explain factors that could affect the curing of concrete

Briefly discuss how does the incorporation of aggregates influence strength of cement basis materials (hint explain why strength of concrete is lower than strength of cement paste)

Address how your hotel/resort will impact the surrounding community in the areas of energy and water use as well as waste-trash and sewerage. The project will identify how the property, its’ activities and guests will impact the surrounding environment, depending on the nature of your recreational activities. This hotel is located in Islamorada, FL (Florida keys)

8) Design a concrete mix for the following conditions and constraints using the absolute volume method: Design Environment : Non-air entrained concrete will be used to cast Concrete frame. Required design strength(5000 psi) Minimum dimension (10 in.) Minimum space between rebars (1.5 in.) Minimum cover over rebars (2.5 in.) Standard deviation of compressive strength (600 psi) , (25 samples) Available Materials Cement Type II , moderate exposure Coarse aggregate Nominal Maximum size 1 in. river gravel (round) Bulk oven dry specific gravity =2.65, absorption = 3%, oven dry density 110 pcf , Moisture content 2%. Fine aggregate : Natural sand , Bulk oven-dry specific 2.5 , Absorption = 1% , Moisture content = 0.5% , Fineness modulus = 2.80

(Time limited 70mins)

Q.1 A dried soil was subjected to particle size analysis with the following results:

Determine the percentage (%) for gravel (G):

Q.2 Determine the percentage (%) for sand (S):

Q.3 Classify the fine-grained portion of the soil sample by using the Plasticity Chart.

Provide your answer by using the format listed in the table below.

i.e. if the answer is CH, enter 3 as your answer.

Q.4 Determine the coefficient of uniformity (C_u):

Q.5 Determine the coefficient of curvature (C_c):

Q.6 Determine the effective size, D₁₀ in mm:

Q.7 Determine the effective size, D₃₀ in mm:

Q.8 Determine the effective size, D₆₀ in mm:

Q.9 Determine the plastic index of the soil sample if the plastic limit (PL) and the liquid limit (LL) are 15.1 and 49.1, respectively:

Q.10

Classify the fine-grained portion of the soil sample by using the British Soil Classification System.

Provide your answer by using the format listed in the table below.

i.e. if the answer is SCL, enter 2021 as your answer.

List 3 key assumptions made in the infinite slope safety calculation method. State whether each of the assumptions would lead to a safe or unsafe design.

1. What is the difference between the Constant Head and Falling Head Permeability Test?

2. What principal are the two permeability tests based on?

3. Why would one use the falling head tests instead of the constant head test?

4. If you anticipate that the permeability of a soil is approximately 0.000001 cm/sec and the falling head permeability testing equipment had the following dimensions, how long should the test take if the beginning head is 20 cm and the final head is 15 cm? Diameter of the stand pipe with area (a) is 1 cm. Diameter of the soil specimen with an area (A) is 6 cm. The length of the soil specimen is 15 cm.

5. If the coefficient in Hazen’s equation is 1 compute the D10 of the soil having a permeability of 0.001 cm/sec.

With the aid of sketch, explain the main differences between window type air-conditioner and split type air-conditioner. Why the window type and split type air-conditioner is not commonly used for high rise commercial building?