Division 4: Masonry Flashcards
A proportioned mixture of siliceous materials and cement which, after being prepared in a plastic state with water, hardens into a stonelike mass.
Mortar
Mortar applied to wall surface as a preparation or a hard finish coat.
Plaster
The proportioned mixture of cement, fine aggregate and water.
Cement mortar
The strength of the mortar also appears to be increased by the addition of not more than ____ of hydrated lime.
15%
For rubble stonework under ordinary conditions a mortar composed of __ parts of sand to __ part of cement.
4, 1
A three coat job Consists of a first binding coat called ______.
Scratch coat
Second straightening coat called ________.
Brown-coat
Final coat
Finish coat
Mixed with water, sand and sometimes with lime putty; used for two and three-coat finish surfaces for exterior and interior walls and ceilings.
Portland cement Plaster
Scratch, brown coats and sand float finish
1 cement, 1/4 lime putty, 3 sand
The finish coat may be smooth or hard finish or, if sand is added, called a _________.
Sand float finish
In three coat plastering work, the scratch and brown coats are __ thk at minimum; the finish coat is __ with a minimum of __ at any point
1/4” thk
1:8”
1/16”
Thickness of plaster coats depends on the _______ to which the plaster is plaster is applied.
Type of material
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
Fibered gypsum plaster
Gypsum plaster mixed with fine white sand.
Prepared gypsum plaster
Gypsum plaster mixed with ingredients develops more adhesive strength
Bonding plaster
Gypsum plaster mixed on the job with water or other suitable mineral aggregate.
Lightweight gypsum plaster or fire resistant plaster
Plaster of paris mixed with alum or borax or other materials
Keene’s cement
For ornamental plaster work and carvings
Plaster of Paris
For ornamental plaster work and castings.
Molding Plaster
Gypsum plaster mixed with other ingredients to develop small air throughout the plaster in combinations covered by trademarks or patents.
Acoustic plaster
A highly decorative type of plaster work developed in Italy
Sgraffito
A built up construction or combination of building materials as clay, concrete, or stone set in mortar or plain concrete.
Masonry
The horizontal surfaces on which the stones or bricks of walls lie in the courses.
Bed
A continous layer of bricks, stones or other masonry units.
Course
Each continuous, vertical section of the wall, one masonry unit thick.
Wythe or Tier
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
Bond
A brick or block masonry laid lengthwise of a wall
Stretcher
A brick or block masonry extending over the thickness of the wall
Header
A unit laid on its end with its face perpendicular to the face of the wall.
Soldier
The corner stones at the angles of buildings
Quoins
Masonry of rough, undressed stones.
Rubble work
When the roughest irregularities are knocked off.
Scabbled rubble
When the stones in each course are rudely dressed to a nearly uniform height
Range rubble
Uniform courses with stones uniform in size.
Coursed ashlar/ Ranged work
Course laid with the horizontal joints uninterrupted but the width of the course and the length of the stones are varied to produce a wall with a less regular pattern.
Broken Range Ashlar
The course retain their rectangular shape and are laid on horizontal beds but no effort is made to continue the horizontal beds in an uninterrupted manner.
random course ashlar
Courses of stone face of which is jagged picked so as to present a rough surface
Rustic or Rock work
when the heavier stones or areas of stone project from the normal face of the surrounding wall or of the joint themselves.
Rustification
Structural units of clay or shale formed while plastic and subsequently fired.
Bricks
Standard size of brick
3 3/4” x 2 1/4” x 8”
Specially processed to give certain surface characteristics. Used for exposed masonry surfaces
Facing brick
These have a smooth outer surface with a dull satin or high gloss finish. They are load bearing, fire resisting and impervious.
Glazed brick
Ordinarily made from a mixture of flint clay and plastic clay used for the liming of furnaces, fireplaces and chimneys
Fire (refractory) brick
Reinforcements for 100mm and 150mm CHB
3/8” diameter ver. Bars @ 600mm center
3/8” diameter hor. Bars every third course
Reinforcement bars for 8” walls
1/2” ver. bars at 24” on centers
1/2” hor. Bars every third course
Lightweight block made from fiber and cement
Durisol
It is used fir lightweight, fire resistant interior partitions. Also called gypsum partition board
Plaster block
