2. A wall footing is to support a 400 mm wide reinforced concrete wall with a dead load of 270 KN/m and a live load of 210 KN/m. The bottom of the footing is 1.50 m below the final grade. Assume the soil weighs 15.78 KN/m3 and the allowable soil pressure is 190 Kpa. Use 75 mm as concrete cover, fc’ is 28 Mpa, fy is 415 Mpa, and concrete weights 23.5 KN/m3. Compute the:

1. Width and depth of footing
2. Spacing of 20 mm diameter main bars and 12 mm diameter longitudinal temperature and shrinkage steel
3. The development length required if bar location, coating, and size factors are all 1.0. Use normal weight concrete

Derive the relationships between maximum and mean velocities in case of laminar and turbulent flows?

(Fluid Mechanics)

geology to civil engineering

do the ideas in your report connect to learning outcome, or to what scholars have
written in their work of your topic?  What new ideas have you added to the conversation? What ideas do you analyse?

Design a plain concrete footing for a 400 mm reinforced concrete wall that supports a DL = 185 KN/m and 95 KN/m live load. The base of the footing is to be 1.2 m below the final grade. fc’ = 20.7 Mpa and allowable soil pressure is 200 Kpa, weight of soil is 15.82 KN/m3.

(ACI)

A 400 mm concrete wall supports a dead load of 280 KN/m and a live load of 230 KN. The allowable bearing pressure is 230 KN/m2 and the level of the bottom of the footing is 1.5 m below the ground surface. Assume concrete weighs 24 KN/m3, that of soil is 15.74 KN/m3, fc’ = 20.7 Mpa, fy = 248 MPa,. Use 25 mm diameter reinforcing bars. Thickness of footing = 500 mm and concrete cover is 75 mm.

Calculate the :

(a) effective soil pressure

(b) width of wall footing

(c) spacing of bars at critical section

The column has dimension of 500 mm x 500 mm and carries an axial load of 1210 KN dead load and 650 KN live load. Allowable soil pressure is 240 Kpa. There is 0.7 m height of soil having a unit weight of 15.74 KN/m3, fc’ = 20.7 Mpa, fy = 276.5 Mpa. The footing section is 2.8 m x 2.8 m with a 600 mm thickness. Use 25 mm diameter main bars.

For 610 UB 113 Grade 300 plus universal beam with full lateral restrain to the critical flange maximum design moment capacity M* about the x-axis

Q1. Gombo Water and Sanitation Company Limited has been having a problem with regards to the operation of
the company which has caused the organization not to satisfy the needs of the customers due to frequent
breakdown of water and sewerage pumps, residents receiving brownish water and not addressing customer
complaints of high bills, residents not receiving adequate supply of water and leakages in the distribution.
The other problem has been frequent sewerage blockages which results in direct discharge of raw sewerage
into the Mulungushi River hence affecting the ecological process as the main sewerage pipe crosses the
river. In May this year, the company was given a fine by Environmental Management Agency of 50,000
Zambian Kwacha for discharging raw sewerage in the Mulungushi River due to non-function of the
Biological filters. You have been engaged as a consultant by the Government of the Republic of Zambia to
provide solutions to the challenges the utility is facing. What professional advice would you give?

You work for a surveying company. Main roads WA has contracted your company to set out the centre line of a new highway to be constructed. You have found the following video online about a robot that can do the work more effectively:[10 marks]

https://www.youtube.com/watch?v=ZeTJBxgSjEs

Write a one-page report to convince your line manager of the benefits of using the robot for line marking compared to traditional surveying methods.Use scholarly sources to support your argument.In your report address the following:

1. Accuracy and precision

2. Ease of use

3. Productivity

4. Cost per point

Mechanistically, what is the difference between Nabarro-Herring and Coble creep

A rigid pavement is to be designed to provide a service life of 20 years and has an initial PSI of 4.4 and a TSI of 2.5. The modulus of subgrade reaction is determined to be 300 lb/in3. For design, the daily car, pickup truck, and light van traffic is 30,000; and the daily truck traffic consists of 300 passes of single-unit trucks with single and tandem axles, and 400 passes of tractor semi-trailer trucks with single, tandem, and triple axles. The weights for cars, pickups, light vans is two -2000 lb single axles, for single unit trucks are 10,000 lb steering, single axle and 22,000 lb drive, tandem axle and for tractor semi-trailer trucksare 12000 lb steering, single axle, 18,000-lb drive, tandem axle and 50,000 lb, trailer, triple axle.Reliability is 95%, the overall standard deviation is 0.45, the concrete modulus of elasticity is 4.5 million ln/in2, the concrete’s modulus of rupture is 900 lb/in2, the load transfer coefficient is 3.2, the drainage coefficient is 1.0. Determine the required slab thickness.

1. What types of economic process applicate for firing process in tile and brick ?

4. A 1000 litrecontainmenttankcatches the outflowfrom a processing apparatus whichhas 800 litresof water with2 gof chemical agentdissolved in it.  Additional supplycomesinto the tank at 3 litres/hr containing5 g/litreof the chemical agent. The solution leaves thecontainmenttank at 3 litres/hr. When the amount of chemical agentin the containment tankreaches 500 g, no more supplyis allowed to enter the system. Instead,fresh water is input intothe tank at 2 litres/hr; andat the same time,the outflow is increased to 4 litres/hr.  How much chemical agentis heldin thecontainmenttankat any time t.Assume all liquids are well-mixed.(10marks

Calculate the field weights of the ingredients for 0.039 m3 of concrete by using ACI Method of Mix Design. Job specifications dictate the followings:  

Cement content: 300 kg/m3

w/c: 0.57 (by weight, from the strength point of view)

w/c: 0.53 (by weight, from durability point of view)

Fine Aggregate (SSD)/Coarse Aggregate (SSD)=0.45 (by weight)

Air Content: 1,30 %  

For Fine Aggregate (Crushed): SSD Bulk Specific Gravity: 2.47, Total Moisture: 5,0 % and Absorption Aggregate: 2,7 %.  

For Coarse Aggregate (Crushed): SSD Bulk Specific Gravity: 2.60, Absorption Capacity: 2.0 %, Total Moisture: 1.9 % and Dry Rodded Unit Weight: 1470 kg/m3.

Cement: Sulphate Resisting Cement, Specific Gravity: 3.17

FIBER REINFORCED CONCRETE

Explain the use of the following fibers:

a) Steel

b) Glass

c) Natural

d) Polymer

e) Asbestos

f) Carbon