WorksheetsMASONRY
Total questions: 25
Worksheet time: 25mins
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
(a)
is a proportioned mixture of cement, fine aggregate and water.
(a)
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
(a)
For first-class mortars 1 part of cement should be added to not more than (a) .
Replacing 10 or 15 percent of the cement by volume with hydrated lime gives greater (a) and increases the strength of the mortar
For rubble stonework, (a) will be much stronger than lime mortar.
For the top surface of floors and walks, use (a)
The cement and sand should be mixed (a) in small batches in the proportions required on a clean platform.
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.
(a)
Plastering is done according to two basic methods:
(a)
is mortar applied to wall surfaces as a preparation or a hard finish coat
(a)
A three-coat job consists of :
(a)
In the two-coat work, the (a) are combined into one.
TYPES OF PLASTER
(a)
putty (hydrated lime and water), mixed on the job with sand and gypsum plaster, used for two and three-coat finish surfaces for interior walls and ceilings.
(a)
Plaster of Paris mixed with clay, lime and other materials in combinations covered by trademarks or patents. Mixed on the job with water, sand, lime putty, hair or fiber for two or three-coat finish surfaces for interior walls and ceilings; or used dry as ingredient for hard or sand float finish with lime plaster (see above).
(a)
Same as gypsum plaster but mixed to meet established standards. Mixed on the job with water, sand, lime putty, hair or fiber for two and three-coat finish surfaces for both exteriors and interiors.
(a)
Gypsum plaster premixed with fibers. Mixed on the job with water and sand for scratch coat for three-coat plastering job
(a)
Gypsum plaster mixed with fine white sand. Used for two and three-coat finish surfaces for interior walls and ceilings .
(a)
Gypsum plaster mixed with ingredients develop more adhesive strength in combinations covered by trademarks or patents. Used for interior finish for smooth concrete walls or ceilings. Mix and apply as per manufacturer's directions
(a)
Gypsum plaster mixed on the job with water, perlite, vermiculite or other suitable mineral aggregate. Lightweight gypsum plaster is used when weight is important, and for fire-proofing other materials such as steel. Applied on lath. For interior use only
(a)
Plaster of Paris mixed with alum or borax or other materials and burned (calcined) at 932F. Mixed on the job with water, lime putty and fine white sand as hard finish for two and three-coat gypsum plaster. For interior use only
(a)
a final coat called
(a)
a second straightening coat called the
(a)
a first binding coat called
(a)
