AAC Block work ppt.pdf

AAC masonry

1. AAC Block Masonry Work

2. ❑Tools tobeused in block masonry work
•Rubber hammer
•3mm notch trowel
•Plumb bob
•Line dori
•Water level
•Measurement tape
•Block cutting machine
•Stirrer machine
•Right angle
•Broom stick

3. ❑Point to be check for masonry work.
•Proper drawing study
•Proper planning of work
•Surface Cleaning
•Right angle from foyer as per Drawing
•Use fully wetted block
•Chemical mixing with mechanical stirrer machine
•Use rubber hammer & notch trowel
•Masonary joint Proper fill with mortar/chemical
•Checking of Staggered joints
•Toothing at wall junction
•Checking of block work in vertical and horizontal direction
•Coping casting at intermediate level.
•Check level of lintel
•Housekeeping and cleaning

4. ❑AAC Block Properties
AAC (Autoclaved Aerated Concrete)
Sr.noName of test TestingMethod
std.
Limitsas per is-2185(part-
3)-1984
Grade -1
1Length
IS-2185(part-3)
Maxi +/-5mm
Height Maxi +/-3mm
Width Maxi +/-3mm
2Avg. compressive
Strength(N/mm2)
IS-6441(part-5) Min4 (N/mm2)
3Block density(dry)kg/m3 IS-6441(part-1) 551 to 650 (kg/m3)
4Drying shrinkage(%) IS-6441(part-2) Max 0.05%
5Thermal ConductivityW/m.kIS-3346 Max 0.24(W/m.k) (watt per
meter kelvin)

5. ❑Block Adhesive Properties
Parameters Ultratech
Appearance Free flowing
Colour Grey
Water demand (Per bag) 25-30%
Bulk Density 1.45–1.55 gm/cc
Pot life Approximately2 hrs. at 27 C
Open time 5-10minutes
Compressive Strength at 28 daysMin10-11 Mpa
Tensile SplittingStrength Min 0.3 Mpa (for 4mm at 28 days )

6. ❑Ultratech Fixoblock -Coverage
Block size (mm) Wall area Coverage
LengthHeight Thickness(Sq.ft/40 kg bag)
600 200 100 160-180
600 200 150 120-140
600 200 200 70-90
600 200 300 50-70

7. ❑Proper drawing study

8. ❑Proper Planning of work
Sr.no. Flat no. 1901 1902 1903 1904
1
Lineout work
Strat date 02-06-19 04-06-19
2
Finishdate 03-06-19 05-06-19
3
Block work up to
coping level
Strat date 29-05-19 30-05-19 04-06-19 06-06-19
4
Finishdate 30-05-19 31-05-19 05-06-19
5
Coping casting
Strat date 31-05-19 01-06-19
6
Finishdate 01-06-19 02-06-19
7
Block work coping
up to slab bottom.
start date 02-06-19 04-06-19
8
Finish date 04-06-19 06-06-19

9. ❑Right angle from foyer as per Drawing

10. ❑Right angle at floor level for layout work

11. ❑After layout dimension checking

12. ❑Use fully wetted blocks

13. ❑Manufacturerinstruction from Fixoblock brand
❑Surfacepreparation
▪ PreparethesurfacesbeforetheUltratechFixoblockapplicationbyremovingoil,bondinhibitingagents
dirt,dustandlaitance.
▪ Cleanthesurfacewithwirebrush/waterjet/moppingassuitable.
▪ Wettheblock,bricksconcreteblocksbeforeapplicationofUltratechFixoblocktoavoidanyabrupt
absorptionofwaterfromthematerial.
❑Mixing
▪ UltratechFixoblockrequired25%ofwaterbyweightofmaterial.
▪ MixUltratechFixoblocktothemeasuredquantityofwaterusingmechanicalstirringfor2-3Minutesto
ensureaconsistencyfreeoflumps.
❑Application
▪ ItisrecommendedtoapplyUltratechFixoblockwithnotchtrowelsforattaininguniformthicknessof
3mmconsistency.
▪ AvoidusingUltratechFixoblockinwaterconsistency(Slurryfrom)toavoidgenerationofairpockets
betweentheAACblocksanddevelopmentsofcracks.

14. ❑Chemical mixing
with Stirrer Mixer

15. ❑Use notch trowel in one direction

16. ❑Use rubber hammer in block masonry work

17. ❑block masonry wall joint filling.

18. ❑Alternate joint in block masonry

19. ❑Toothing

20. ❑Masonry top level checking

21. ❑Plumb check on wall

22. ❑Plumb check on beam face to wall face.

23. ❑Coping casting.
❑Checking of Coping top surface level.

24. ❑Lintel casting and fixing

25. ❑Housekeeping and cleaning work

26. Block Adhesive consumption and productivity.

27. Thank you