In a quality control test for pavement construction, the engineer cut out a core of the asphalt mix. Laboratory tests were conducted on the core to determine the volumetric properties of the mix. The dry mass of the core is 1200 g, the saturated surface dry mass is 1202.5 g and the submerged mass is 691.9 g. The engineer separated the bitumen from aggregate and found that the dry mass of the aggregate was 1132.8g. The specific gravity of bitumen is 1.05 and the percentage of bitumen absorption is 0.5%. The aggregate bulk specific gravity is 2.76, determine the following:
a) bulk specific gravity of the compacted mix
b) Effective specific Gravity aggregates
c) max theoretical specific gravity of asphalt mix
d) percentage by mass of effective binder content
e) percentage of air voids in the total mix
f) pencetage of voids in the mineral aggregates
In: Civil Engineering
500 mm thick square footing is to be placed at a depth of 0.5 m in a clayey sand where c¢ = 10 kPa, f¢ = 34°, g = 19.0 kN/m3. The column load to be applied on the footing is 2000 kN. What should be the width of the footing?
In: Civil Engineering
Construction Documents Review
26. Define Attention to Details and Negligence in construction projects
27. Explain Bidding Process / Bid Day
28. What is a Construction contract administration / Error and Omission insurance
29.What is a Project file / Project Evaluation / BIM
30. Explain Communication in Construction projects (relationship of GC, owner, etc.)
In: Civil Engineering
31. Explain Construction Law and Ethics
32. Explain Quality Control and Quality Assurance
33. Explain Walk-Thru / Punch list / Retainage / Warranty
34. Explain Claims, Disputes and Conflicts, Negotiation, Mediation, Arbitration
In: Civil Engineering
Construction Documents Review
21. Difference between Insurance and Bond
22. Explain Lien and Lien process
23. Construction cost estimating / Different types / Cost Monitoring / Units of Measurement
24. Construction Contract types / Lump Sum / Cost plus contracts / GMP
25. Construction Scheduling / CPM / Delay / Fast Track / Turn Key / Liquidated Damages
In: Civil Engineering
Construction Documents Review
11. Explain Addendum, Addenda, and Change Order in construction projects.
12. Name and explain three items (required at minimum) in a Change Order.
13. What is the Door Schedule, Window Schedule & Room Finishes?
In: Civil Engineering
Construction Documents Review
17. Definitions; Submittal, Constructability, Vented soffit, Specifier, Lead time, etc.
18. Four levels of certification for Green projects? Three levels of credentials for individuals?
19. Four Insurances required at minimum for Construction Projects?
20. Three Bonds required for Construction projects?
In: Civil Engineering
Construction Documents
1. What is included in a Bid Package for a construction project?
2. Name and explain the three different stages of construction projects development.
3. Name and explain the three different stages of Architectural Design process for construction projects.
4. Name ten (10) different drawings in a set of drawing for a construction project.
5. What is Title Block and what type of information you can find in a Title Block?
In: Civil Engineering
Write a short letter to the owner stating your companies intention to bid the job and name one specific idea to improve or "value engineer" the project. These projects often are tight budget-wise, so it is not uncommon for contractors to work with the engineers to get the best possible outcome for the owner.
In: Civil Engineering
Which of the following are common characteristics of thermoset polymers?
Group of answer choices
None of the these.
Linear or slightly branched long chain molecules.
Soften on heating and harden on cooling.
Heavily networked or cross linked structures.
Which of the following statements is a TRUE statement?
Group of answer choices
Higher molecular weight of a polymer will always have superior properties.
Crystallization is not affected by the molecular weight of the polymer.
Elastomers have very long chains with a high degree of cross linking.
Crystalline polymers are optically transparent.
The resistance of a metal, R, is defined by the equation of R = ρ l A where A is cross-sectional area, l is length, and ρ is resistivity. How would you categorize resistance?
Resistance is a __________.
Group of answer choices
Process
Property
Structure
Performance
Other
The addition of a boron (B) impurity to otherwise pure silicon (Si) will:
(Pick all correct answers)
Group of answer choices
Decrease conductivity due to additional scattering of electrons due to the impurity
Create an additional allowable energy level inside the band-gap called an acceptor level
Create an extrinsic semiconductor with the majority charge carrier being a hole instead of an electron
The casting process is preferred for processing brittle metals.
Group of answer choices
True
False
Normalizing process transforms deformed large grains into smaller grains.
Group of answer choices
True
False
Titanium alloys have higher strength and density than steel alloys.
Group of answer choices
True
False
MgO and FeO have an NaCl structure.
Group of answer choices
True
False
In: Civil Engineering
A 6-m span simply supported beam carries a uniformly distributed ultimate load of 70 kN/m. The dimensions of the beam section are b = 300 mm, d = 700 mm. The beam is reinforced with bars of 25-mm diameter in one row. f’c = 25 MPa, and Fy = 420 MPa. Use # 10 U-shaped stirrups. Neglect the column width. The stirrup spacings (s) is equal to:
| a. |
450 mm |
|
| b. |
350 mm |
|
| c. |
400 mm |
|
| d. |
500 mm |
In: Civil Engineering
. In what way the deflection affects the strength and stability of the steel structure?. Elaborate the limit states that controls the deflection. As a civil engineer specify the standard codal provision for deflection limits?
In: Civil Engineering
Discuss the result of the design of fillet weld for a tie member of a truss consist of an angle section ISA 100 x 75 x 8 mm of Fe410 grade, is welded to an 8 mm gusset plate. Design a weld to transmit a load equal to the full strength of the member. Assume shop welding. If the gusset plates are connected by 2 angle section ISA 65 x 65 x 6 mm back to back to the same gusset plate. Design a weld to transmit a load equal to the full strength of the member. Express your opinion on how the length of the weld are different for both the design form your results.
In: Civil Engineering
Discuss in detail the causes of twisting moment due to eccentric loading in bolted connection (include sketch). Explain the various approach in the design of moment resistance connection. As a civil engineer conclude the best approach of design?
In: Civil Engineering
Give short answers to the following: (a) (i) Write the equation for Mohr-Coulomb shear failure criteria for soils. Define the variables in the equation. Also, show how this equation is represented in a graph. Label your graph. (ii) Name two laboratory tests to determine the shear strength of the soils. (b) The soil below a concrete dam has a porosity of 0.4 and density of solids of 2.7 gm/cm3 . To ensure safety against piping, the specifications state that the critical gradient which cause piping should be 6 times the exit gradient. What is the allowable exit gradient?(c) In calculation of consolidation settlement we assume that the consolidation is onedimensional (in vertical direction only). Is this a reasonable assumption? Why? (d) Why the permeability of sand increases with the increase in grain size of the sand? (e) What are the advantages and disadvantages of a triaxial compression test? (f) Unconfined compression test was conducted on a saturated clay. The vertical stress at failure was 200 kN/m2 . Sketch (not to scale) the Mohr circle and find the shear strength parameters for this soil.
GEOTECHNICAL COURCE
In: Civil Engineering