MASONRY Flashcards
a proportioned mixture of siliceous materials (sand, crushed stone) and cement (lime, Portland) which, after being prepared in a plastic state with water, hardens into a stonelike mass.
Mortars and Plasters
is cement mix used to glue masonry units to each other, or other surface finishing materials like tiles, bricks, stones to a receiving structure like a wall or floor.
Mortars
is mortar applied to wall surfaces as a preparation or a hard finish coat.
Plaster
is a proportioned mixture of cement, fine aggregate and water.
Cement Mortar
1 part of cement should be added to not more than 3 parts of sand.
First-Class Mortars
1 : 4 will be much stronger than lime mortar.
Rubble Stonework
use 1 : 1 to 1-1/2.
Top Surface of Floors and Walks
is a mortar of cementitious material ( lime, gypsum or cement), sand and water which is applied in coats (layers) to masonry surfaces, lath or various types of plaster board to give a hard finish surface to interior or exterior walls and ceilings.
Plaster
called scratch coat
First Binding Coat
called the brown-coat
Second Straightening Coat
called the finish coat
Final Coat
In the two-coat work, the ________ and ______ coats are combined into one.
Scratch and Brown
Types of Plaster
Lime Putty, Gypsum Plaster, Portland Cement Plaster, Sgrafitto
Types of Gypsum Plaster
High-Strength Gypsum Plaster, Fibered Gypsum Plaster, Prepared Gypsum Plaster, Bonding Plaster, Lightweight Gypsum Plaster (Fire Resistant Plaster), Keene’s Cement, Plaster of Paris, Molding Plaster, Acoustic Plaster
mixed on the job with sand and gypsum plaster, used for two and three-coat finish surfaces for interior walls and ceilings.
Lime Putty
Plaster of Paris mixed with clay, lime and other materials in combinations covered by trademarks or
patents.
Gypsum Plaster
Same as gypsum plaster but mixed to meet established standards.
High-Strength Gypsum Plaster
Gypsum plaster premixed with fibers. Mixed on the job with water and sand for scratch coat for three-coat plastering job
Fibered Gypsum Plaster
Gypsum plaster mixed with fine white sand. Used for two and three-coat finish surfaces for interior walls and ceilings.
Prepared Gypsum Plaster
Gypsum plaster mixed with ingredients develop more adhesive strength in combinations covered by trademarks or patents.
Bonding Plaster
Gypsum plaster mixed on the job with water, perlite, vermiculite or other suitable mineral aggregate.
Lightweight gypsum plaster, fire-resistant plaster
Plaster of Paris mixed with alum or borax or other materials and burned (calcined) at 932F.
Keene’s Cement
For ornamental plaster work and castings.
Plaster of Paris
For ornamental plaster work and castings. Mix with water as per manufacturer’s directions.
Molding Plaster
For acoustic treatment of interior walls and ceilings. Applied on gypsum plaster base coats. Mix with water as per manufacturer’s directions.
Acoustics Plaster
Mixed with water, sand and lime putty. Used for two and three-coat finish surfaces for exterior and interior walls and ceiling
Portland Cement Plaster
This type of technique consists of applying two or three thin coats of plaster different colors and then cutting away certain areas of one or two coats to produce a three-dimensional colored design.
Sgraffito
The horizontal surfaces on which the stones or bricks of walls lie in the courses.
Bed
A continuous layer of bricks, stones, or other masonry units
Course
Each continuous, vertical section of the wall, one masonry unit thick.
Wythe or Tier
That connection between bricks, stones or other masonry units formed by lapping them one upon another carrying up the work, so as to form an inseparable mass of building, by preventing the vertical joints falling over each other (also called a breaking joint).
Bond