Masonry Flashcards
Rule for load bearing walls
Do NOT interlock courses of block
Planning saves…
Time, Labor, Materials
Tooling / Striking
“Tool” all mortar joints once mortar becomes “thumbprint” dry
Rule for a Closure Block
Leave a minimum of a 16 1/2” gap
Desirable properties of Mortar
Plasticity, water retentivity, strength, durability
4 types of mortar
Type … M , S , N , O
CMU block referenced dimensions , actual dimensions
Ref. - 8”x8”x16”
Act. - 7 5/8” x 7 5/8” x 15 5/8”
Portland Cement requires using…
Lime
1 person can mix 1 cu yd per hour
Hand Mixing
Forms (hold concrete until it sets) must be _______?
Tight, rigid, strong
4 types of Foundations
Footer , Monolithic , Stem Wall , Floating Slab
Construction Joints are ___ and ___.
Horizontal Keyway, Vertical Keyway
Portland Cement shipping bags are…
94lbs , contain 1 cu ft. of loose material
4 types of Concrete
Reinforced, Prestressed, Precast, Lightweight
Concrete advantages
High compressional strength, low maintenance, economical, used universally, durable, strength can be determined
Concrete disadvantages
Low tensile strength, expands + contracts, shrinks when dry, heavy
Types of Portland Cement
Type I - Normal Portland Type II - Modified Portland Type III - High Early Type IV - Low Heat Type V - Sulfate Resistant
Most common Type of Portland Cement + how long to fully cure
Type I , 28 days
Most common type of Cement
Portland Cement
3 major components of concrete
Water , Aggregates , Portland Cement
What are Aggregates & what is Aggregates rule of thumb
Look at the fkn slides
Hydration
Chemical reaction when Portland Cement is mixed with water
Types of Cement
Portland Cement, White Portland, Air Entrained, Oil Well Cements
Portland Cement Barrels contain..
376lbs, equal to 4 bags
