1. Hacking (tacha) of columns, beams including soffit,
ceiling, lofts, etc. in-situ works or precast components shall be checked.
Tacha should be one per square inch. Removal of plastic/oil skin
from old concrete surface shall be ensured. Please do the above at the
deshuttering stage. Don't wait for the RCC to get so hard at plaster stage.
2. The line, level and plumb of masonry and door window frames shall be
checked.
3. Proper raking of masonry joints shall be ensured. Masonry joints shall be
inspected for hollowness. Hollow joints, if any, shall be
refilled.
4. Fix katka (aggregate) with mortar & chicken mesh at junction of the
masonary with concrete surfaces.
5. Wetting of wall surfaces shall be ensured before starting the plaster by
spraying water. The concrete surfaces should be sprayed with cement slurry.
6. Necessary scaffolding shall be erected as required. No scaffolding
member should be inserted directly into the masonary.
7. Plaster pads, (Thickness Indicators or T.I.) of required thickness (12 mm or as
specified) shall be taken on the walls. The plaster pads shall come
within the range of aluminium square tubes which shall be used for maintaining
the uniform level of surface of plaster. T.I. should be taken at least
one day before.
8.
Sand to be used for plaster shall be sieved on 4.75 mm sieve.
9. Dry mixing of mortar of specified mix shall be done on raised
platform/steel plates.
Wet mixing shall be done thoroughly as and when
required. No centering plate should used as platform for the same. Use of
mortar within 30 minutes (before setting time) after adding water shall be
ensured.
10.
Use a mix proportion of 1:4 cement � sand mortar.
11.
Plumb, right angle, level of plaster; required size of door/window frames after
plaster, plumb and level of door/window jambs, shall be checked.
12. Mortar splashes on door window frames shall be cleaned & the entire
area should be cleaned after day's work is completed.
13. Plastering shall be cured by watering for 7 days. Please hold the pipe at the
top of the plastered component and let the water cascade down. This increases
absorption of water and doesn't waste it.
