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CMP 124 Exam 2 Questions with Correct Answers.
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CMP 124 Exam 2 Questions with Correct Answers.
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CMP 124 Exam 2 Questions with Correct AnswersFour functions of mortar Correct Answer-Mortar binds, seals,
compensates, and for esthetics
Mortar Binds Correct Answer-Mortar binds Units together - wall ties, re-
enforcement
Mortar Seals Correct Answer-Weather, wind, moisture, bugs
Mortar Compensates Correct Answer-For size variation
Mortar Esthetics Correct Answer-color, shadow lines
Mortar is a combination of Correct Answer-Portland cement and lime
Sand - cleaned and washed
Water
Mortar is used with Correct Answer-Brick, stone, CMU (foundation
backup)
Mortar Properties (Plastic State) Correct Answer-Workable
- As much as possible and still maintain workability
- (in concrete - low water/cement ratio)
- Aids bonding
,Water Retentive
- Suction rate absorption rate of unit
Bond Quality
-Adheres to the unit while placing
Consistent rate of hardening
Mortar Properties (Harden State) Correct Answer-Appearance
-Workmanship
Seals
-Bonds to keep moisture/air out
-Tooled Joints
Bonds
-Mechanical, Chemical
Low Efflorescence
-White powder appearance
-To clean
*Brush with water
, *Acid solution - brush - rinse with water
Most common type of mortar Correct Answer-Type M
-2500 psi compressive strength
-Used above and below grade
Type N
-750 psi compressive strength
-Used above grade
Mortar Color Correct Answer--Type (brand) of mortar used
-Time of Tooling (striking)
-Pigment added to (stay consistent)
-Aggregate Color
Mixing Mortar Correct Answer-Ratios
-Hand and shovel (Mortar=1, Sand=3)
-Why so High? (it takes more mortar to cover sand than it does to cover
aggregate in concrete)
Handeling and Placing Mortar Correct Answer-Re-tempering
-Adding more water
-Can only do with mortar and not concrete
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