CMP 124 Exam 2 Questions and
Answers All Correct
4 Functions of Mortar - Answer--bind
-seal: moisure + air
-compensate: size variation
-esthetic: color + shadow lines
Make up of Mortar - Answer--portland cement + lime
-sand (clean washed) (well graded)
-water (clean)
What do we use mortar with - Answer--bricks
-stones
-CMU's
mortar plastic state - Answer--workable
-water retentative
-bond quality
-consistent rate of hardening
mortar hardened state - Answer--appearance
-seals
-bond
-low efflorescence: white powder appearance
*how to clean: brush + water
Types of mortar - Answer-*M: 2500psi (best) (above below grade)
S: 1800psi (above below grade)
*N: 750psi (above grade)
O: 350psi (non load bearing)
K: 75psi (truck pointing)
*= most common
Mortar color - Answer-- depends on type of mortar
- time of tooling(stricking)
- pigments added
- aggregate color
Mortar mixing - Answer-hand shovel
mortar = 1
, sand = 3
handeling/ placing mortar - Answer-retempering: adding more water
*can only do with mortar not concrete
typical mortar joint size - Answer-3/8''
admixtures to mortar - Answer--calcium chloride: caution is using steel use liquid not
powder
-cold weather options: hot sand
*caution with hot water... flash set
moisture proofing (mortar) - Answer-parging: back plaster, tar, mastic
types of tooled mortar joints - Answer-- concave
- vee
- flush
- raked
- extruded
- beaded
- struck
- weathered
Sheathing and panels - Answer-exterior layer on the outside wall, but not final exterior
surface
sheathing insulation - Answer-- polystyrene (foam)
*expanded R- 3.9/inch
*extruded R- 5 (can go below grade
- wood fiber
*R- 2.9/inch
- other foam (polyisocyanurates) R- 7/inch
disadvantages of foam - Answer--no racking strength
-no structural strength(requires wind bracing) (steel bands)(cut in boards)
-thickness of material (Jumb extensions)
Panel materials - Answer--plywood: thin sheets laminated togethers
-composite: veneer faces bonded to wood core
-non-veneered: OSB, particle board, wafer
plywood construction - Answer--thin sheets laminated
-adhesives: waterproof or water resistant
-odd number of piles
-construction grade plywood = structural
Answers All Correct
4 Functions of Mortar - Answer--bind
-seal: moisure + air
-compensate: size variation
-esthetic: color + shadow lines
Make up of Mortar - Answer--portland cement + lime
-sand (clean washed) (well graded)
-water (clean)
What do we use mortar with - Answer--bricks
-stones
-CMU's
mortar plastic state - Answer--workable
-water retentative
-bond quality
-consistent rate of hardening
mortar hardened state - Answer--appearance
-seals
-bond
-low efflorescence: white powder appearance
*how to clean: brush + water
Types of mortar - Answer-*M: 2500psi (best) (above below grade)
S: 1800psi (above below grade)
*N: 750psi (above grade)
O: 350psi (non load bearing)
K: 75psi (truck pointing)
*= most common
Mortar color - Answer-- depends on type of mortar
- time of tooling(stricking)
- pigments added
- aggregate color
Mortar mixing - Answer-hand shovel
mortar = 1
, sand = 3
handeling/ placing mortar - Answer-retempering: adding more water
*can only do with mortar not concrete
typical mortar joint size - Answer-3/8''
admixtures to mortar - Answer--calcium chloride: caution is using steel use liquid not
powder
-cold weather options: hot sand
*caution with hot water... flash set
moisture proofing (mortar) - Answer-parging: back plaster, tar, mastic
types of tooled mortar joints - Answer-- concave
- vee
- flush
- raked
- extruded
- beaded
- struck
- weathered
Sheathing and panels - Answer-exterior layer on the outside wall, but not final exterior
surface
sheathing insulation - Answer-- polystyrene (foam)
*expanded R- 3.9/inch
*extruded R- 5 (can go below grade
- wood fiber
*R- 2.9/inch
- other foam (polyisocyanurates) R- 7/inch
disadvantages of foam - Answer--no racking strength
-no structural strength(requires wind bracing) (steel bands)(cut in boards)
-thickness of material (Jumb extensions)
Panel materials - Answer--plywood: thin sheets laminated togethers
-composite: veneer faces bonded to wood core
-non-veneered: OSB, particle board, wafer
plywood construction - Answer--thin sheets laminated
-adhesives: waterproof or water resistant
-odd number of piles
-construction grade plywood = structural
