Does not provide additional strength, but it does improve mortar plasticity, water retention, water
tightness, and bonding ability. correct answers Lime
What ASTM is the standard spec for masonry cement correct answers ASTM C 91
What ASTM is the standard spec for mortar cement correct answers ASTM C 1329
High strength mortar recommended for use in reinforced masonry below grade or in contact with
the earth, as foundation and retaining walls subject to high lateral or compressive loads;
compressive strength is 2500 psi correct answers Type M mortar
Is medium-strength mortar recommended for general use; compressive strength is 750 psi, more
flexible than S or M, which helps to reduce cracks in the masonry units and wall. correct answers
Type N mortar
Minimum compressive strength of only about 350 psi. Very workable, sometimes used for
repair. Generally limited to interior non-loadbearing applications. correct answers Type O mortar
Medium-high strength mortar for use in masonry where bond and lateral strength are more
important than compressive strength; compressive strength is 1800 psi correct answers Type S
mortar
What ASTM is the standard spec for mortar for unit masonry correct answers ASTM C 270
What are the Two lime types correct answers Type N - normal
Type S - higher early plasticity and higher water retentivity capabilities.
IBC does not consider it an acceptable cement for use in commercial buildings correct answers
Plastic Cement
What ASTM Provides proportioning requirements for three different mortars: cement line,
mortar cement, and masonry cement correct answers ASTM C 270
What type of mortar Is not permitted for use in any SFRS for any SDC correct answers Type O
Mortar
SFRS means correct answers Seismic force resisting systems
SDC correct answers Seismic design category
What types of mortar are permitted in SFRS for SDC, D, E, and F correct answers Mortar type
M & S are permitted
, What types of mortar are permitted in SFRS for SDCA, B, and C correct answers Mortar types
M, S, and N are all permitted
What type of mortar is not permitted for use in any SFRS for any SDC correct answers Type O
mortar is not permitted
What type of mortar is permitted with use in glass unit masonry correct answers Type S or M
mortar can be used with glass unit masonry
Specially manufactured mortar must be used for what type of masonry correct answers AAC
masonry requires specially manufactured mortar in thin horizontal mortar joints
Horizontal mortar joints are called correct answers Bed joints
Vertical mortar joints are correct answers Head joints
Mortar must be used within how long of initially adding water to the mix correct answers It must
be used within 2 1/2 hours of initially adding water to the mix
Can you add more water to mortar mix correct answers Yes, but not after 2 1/2 hours
What does grout do? correct answers 1. Grout binds the masonry unit, mortar, and reinforcement
together to create structural masonry.
2. Provides some sheer, but mainly compressive strength to a wall.
3. Embeds reinforcing steel, which provides additional shear strength.
4. Fills empty spaces and voids.
What uses superplasticizer admixtures (and not just extra water) to make the grout soupy and
fluid enough that it can fill grout spaces without being consolidated by a mechanical vibrator?
correct answers Self-consolidating grout
Slumps for conventional grout and self consolidating grout correct answers Conventional grout
has a slump of 8 to 11 inches
Self consolidating grout has a slump flow between 24 and 30 inches
Grout is typically design for a minimum compressive strength of? correct answers 2000 psi
What is the Standard specification for grout for masonry correct answers ASTM C 476.
For ready-mix grout can the slump be adjusted on-site? correct answers Yes, as long as the
specified slump is maintained, then there is no time limit for using ready-mix grout.
When conventional grout is batched on the jobsite, it must be:: correct answers 1. Batched
mechanically per ASTM C 476
2. Mixed for at least 5 minutes
3. Maintain 8" to 11" slump without aggregate segregation