CMP 124 Exam 2 Questions with Correct Answers.

CMP 124 Exam 2 Questions with Correct Answers
Four 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