Materials & Wall Types

Question 1

Galvanic Corrosion - Anode vs. Cathode Materials

Answer 1

T-Bird Gang (Cathodic)
* Stainless Steel
* Brass
* Tin
* Copper

Scorpions Gang (Anodic)
* Aluminum
* Zinc
* Galvanized Steel (Zinc Coated)

Question 2

Types of Concrete

Answer 2

Type I/IA - Common Construction
Type II/IIA - Moderate Water Resistance
Type III/IIIA - Early Strength
Type IV - Low Heat of Hydration
Type V - High Water Resistance

‘A’ = Air Entrained which provides extra workability & increased resistance to freeze-thaw cycles.

Question 3

Typical Concrete Drying Times

Answer 3

7-14 days for full strength
28 days for designed strength

*drying times depend on environments temperature and exposure to weather

Question 4

Types of Construction

Answer 4

Type IA/IB - Fire Resistive
Type IIA/IIB - Non-Combustible
Type IIIA/IIIB - Ordinary (non-combustible exterior)
Type IV - Heavy Timber
Type VA/VB - Combustible

Identifiers
‘A’ = Protected/Higher Fire Rating
‘B’ = Unprotected

Question 5

Glass Fiber Reinforced Concrete (GFRC)

Describe it + Pros/Cons

Question 6

Mortar Types

Answer 6

MaSoN wOrK (Hardest-to-Softest)

Type M -
Type S -
Type N -
Type O -
Type K -

Question 7

Cement Types

Answer 7

Type I - Normal
Type II - Moderate Sulfate Resistance
Type III - High Early Strength (used for precast to pop molds off quickly to reuse them)
Type IV - Low Heat Hydration (XL pours - used in large projects like Dams)
Type V - High Sulfate Resistance

Question 8

EIFS

Answer 8

Synthetic Stucco
Pros:
1. Flexibility for earthquake performance and crack-resistance
2. High insulative values with min. thermal bridging
3. Low Cost
Cons:
1. Won’t breathe like traditional stucco without a drainage plane
2. Easily damaged

Question 9

Glass Fiber Reinforced Concrete (GFRC)

Answer 9

Pros:
* Higher Elasticity, Impact and Flexural Strength than precast panels
* Less Weight and therefore installation costs
* High Early Strength = Shorter Lead times
* More Complex Shapes
* Does not require rebar