one of the important activities in construction work is brickwork. this presentation gives a brief outlook of brickwork masonry and plastering and waterproofing.

1. BRICKWORK, PLASTERING,
WATERPROOFING
Taken by , AGM Satish sir
Group members
R.Shriram
Prasanna
Ajith
Harish

2. Brickwork
• Components
– Brick
– Cement mortar
• Size of brick
-230x110x70mm
- 190x90x90mm
(IS:2691:1988 Revision 2)

3. Where brickwork is done?
• Load bearing walls
• Partition walls
• Parapet walls
• Compound walls
• Footing of LB houses

4. How are bricks made?

5. Class of brick
L b d
• Class A 215-225 105-110 70-75
– Properly burnt chamber bricks
• Class B 210-220 105-110 60-70
– Country bricks
• (all dimensions are in mm)

6. Properties of bricks
• Compressive strength- 35kg/sq.cm
• Water absorption < 20%
• Density -1900 kg/m3
• Physical test
– Uniform size, shape and corner
– Metallic sound
– Stable when dropped from 1.2m height
– Uniform red color
– Should be free from flaw, cracks and lumps.
– For every 4000 bricks 6 samples should be
tested.

7. Typical walls
Wall thickness Mortar ratio
230mm wall
-Outer wall
1:5 or 1:6
115mm wall
-inner partition wall
1:4
75mm wall
-inner wall
1:4

8. Procedure of work
1. Materials for Brickwork
2. Soaking
3. Laying
4. Curing
5. Protection
6. Scaffolding
7. Measurement
(IS 650:1991 Specification for standard sand
for testing of cement)

9. Masonry walls
• most durable part of any building or
structure.
• provide strength, durability to the
structure
• to control indoor and outdoor
temperature.
• Partition

10. Masonry walls
1. Load Bearing Masonry Walls 2. Reinforced Masonry Walls
3. Hollow Masonry Walls 4. Composite Masonry Walls

11. Types of masonry
• Brick masonry
• Cement/fly ash bricks
• Stone masonry
• Random rubble masonry
• Hollow block – 400 mm
x200mmx(150/100/200)mm
• Solid block
• Porotherm block
• Aerocon – 600mmx200mmx(150/100/200)mm

12. Stone masonry

13. Red brick vs. fly ash bricks
Red brick Fly ash brick
color Varying shades Uniform
shape Uneven due to
handmade
Uniform shape and
smooth finish
Weight Heavier lighter
Compressive
strength
35 kg/sq.cm 100 kg/sq.cm
porosity high low
Thermal
conductivity
1.25-1.35 w/m2 c 0.9-1.05 w/m2 c
Water absorption 20-25% 6-12%
cost 5-5.50 rs 3.5 – 4.00 rs

14. Aerocon block
• Advantages
• very easy to handle
• available in large sizes and hence less no. of joints.
• faster construction on site
• less consumption of cement
• increasing in strength of wall.
• Earthquake resistant
• AAC blocks are made from an inorganic material
which helps to avoid termites, damages or losses.
• Saves steel and concrete due to the reduction in
dead weight.

15. Some more..
• Increase in floor area due to a reduction in the size
of columns and thickness of the wall.
• Easy to transport on upper floors.
• AAC blocks have a very low thermal conductivity which keeps
interior remain cool in summer and warm in winter.
• One AAC block of size (600 x 200 x 100 mm) is equivalent to 6
bricks hence it reduces 50% of joints resulting in saving of
mortar up to 48%.
• Minimal wastage of AAC blocks.
• It is environment-friendly and also saves water. Hence it is
popularly used as a green product.
• The production cost of AAC Blocks is expensive but on the
whole project cost decrease.

16. Types of masonry walls

17. Quantity estimation
• No. of bricks per cu.m
• Rate analysis per cu.m
• Estimation

18. Rate analysis
Category particular unit quantity rate amount
Brick work
brick Cu.m 460 5.4 2484
cement Cu.m 1.2 315 378
sand Cu.m 8.64 28 241.92
curing Cu.m 50
labour cft 35.28 21 740.88
plumbing Cu.m 35.28 30
total 3924.8

19. Plastering
objectives
• protect the surface from atmospheric
influences
• to cover the defective workmanship
in masonry
• to conceal porous materials
• to provide a suitable surface for
painting.

20. Ratio
• Rcc surface- 1:3
• Inner wall - 1:4 or 1:5(12mm)
• Outer wall - 1:5 or 1:6(20 mm)
• only 12mm thk plaster per layer.
• Mixture

21. PRE-CHECK
• Specification like lime finish, trowel finish,
sponge finish, rough plaster should be
clarified from architect.
• Check aluminum temp. opening
• Brick work should be cured for 7 days.
• Button mark should be fixed –min 12mm
• For composite structure use chicken mesh
or fibre net.(6” on both sides)
• Admixture if needed
• Hacking to be done(25-30 hacks / sft)

22. procedure
• Keep all the mortar joints
of wall rough, so as to give a good
bonding to hold plaster.
• Wet the surface with cement slurry
• Prepare the mix
– Mix sand with cement
– Add water

23. Post check
• Curing -7 days , after 24hrs of plaster
• Smoothness of plaster surface
• Level of plaster
• Sharpness of Edges and corners
• Groove and other design work
• Window border
• Window sill

24. Quantity
• For 1:5 12mm thk
• For 1:3 20 mm thk

25. Rate analysis
Category particular unit quantity rate amount
plastering
inner
plaster(1:5) cement bags 0.08 315 25.2
sand cft 0
add 40%
bulkage cft 0.711 28 19.908
scaffolding cft 10.76 1.25 13.45
scoff removing cft 10.76 0.75 8.07
labour cft 10.76 10 107.6
curing cft 20
total 194.228

26. Waterproof
• Purpose-
• Done in roof slab,
toilet sunken slab and tank.
• Procedure
• Materials
• chemicals

27. Pre check
• Check water leakage in mother slab
• Find the leakage point and do
pressure grout(chemical used
rendrock)
• Floor chipping
• Wet the surface

28. Procedure
• Arrest the corner v-grove(6” inch) with
plaster mix and fiber net + cico1 or cico3
chemical.
• Tapecrete 1st coat – 1:1.5
tapecrete :cement
• After 4hrs – fiber net covering
• Tapecrete 2nd coat – 1:1.5:0.75(sand)
• After 4hrs 3rd coat
• Fix spout outlet.