Presentation Waterproofing.State-of-Art.ppt

typical waterproofing

1. Water Proofing

2. Col (Retd) Harry Sidhu, FIE
B.Sc Engg (Civil), M Tech (Structures)
LM ICI, LM ISWE, LM ISCMS, LM ISET
Chartered Engineer

3. •Ex Additional Chief Engineer,
Chandigarh Zone
•Ex Technical Advisorto ‘MC
Bauchemie (I) Pvt Ltd’ & ‘McCoy
Silicones’
•Visiting Faculty to ‘National
Technical Teachers Training &
Research Institute’, Chandigarh for
PG Students

4. •Column Expert on Waterproofing:
HT Estates, Hindustan Times, Delhi
& Chandigarh
•Ex Consultant to Chandigarh
Administrationon Waterproofing
•Ex Consultant to CE Chandigarh
Zone (MES)on Waterproofing
•Ex Consultant to CE Bhatinda Zone
(MES)on Waterproofing

5. •External Examiner for M.Tech/ ME
Students IIT Mumbai, Punjab
University& TIET Patiala(Deemed
to be University)
•Consultant for Structural Design,
Rehabilitationand Waterproofing
•Consultant for Soil & Civil Material
Testing

6. What is Damp Proofing?
DAMP PROOFING IS ACTUALLY THE
MANAGEMENT OF WATER :THE ART
OF MAKINGFLOW OF WATER EASIER,
KEEPINGINSIDE WATER IN &
OUTSIDE WATER OUT

7. Waterproofing/Damp proofing!!
Treatment of a Surface or Structure
to prevent passage of water in the:
Absenceof Hydrostatic
Pressure
Presenceof Hydrostatic
Pressure
-Damp Proofing
-Waterproofing
As per ACI Committee 515

8. Sources of Leakage/Dampness
Roofs & Terraces
Parapet & Roof Junction
Crumple Joints
Sunken Floors

9. Sources of Leakage/Dampness
Defective DPC
Porous Masonry, RWP’s,
Chajjas, Window Cills etc
Leaking Water meters, Service
Tanks, pipes etc

10. Roofs

11. This is how
are Roof
Tops are
Generally
maintained

12. Potential Leakage Areas from
Terraces
RWP
Parapet
Junctions
Depressed Tiles

13. Crumple Joints

14. Loads on Crumple Joint
Slab
Tarfelt
DL+LL DL+LL
Thermal Stresses
Seismic Forces

15. Crumple Joint Under Loads
Slab
Tarfelt
Thermal Stresses
DL+LL DL+LL
Seismic Forces

16. The way
joints are
generally
Sealed
Disintegrated
Polysulphide

17. JOINT COVERED !!

18. Cracked
Cover of
the
Building
Joint

19. Cracked Polysulphide

20. Wet Areas

21. Neat Cement
Joint
Floor Finish
Ceramic
Tiles
Dampness in Sunken Floors
Accumulated
Water

22. Finished Floor
Level
Leakage through Floor Traps
Floor
Traps
Major
Source
of
Leakage

23. RISING DAMPNESS
IN WALLS

26. Rise of Water by Capillary Action
Rise related to
Capillary
Diameter
Considering average capillary dia in
masonry, the rise is roughly 1.5 mtrs

27. Sub Base
Skirtin
g
Floo
r
GL
DPC
GWT
Rise of Ground Water into
Walls

28. Skirtin
g
Floo
r
GL
Sub Base
DPC
Entry of Surface Water into
Walls

29. Water Proof
Water Repellent

30. Water Repellency

31. Major Cause of Porosity
Uncontrolled Water Cement Ratio

32. Continuous Capillaries in Concrete

33. Water/Cement Ratio
V/s
Permeability
Water/Cement Ratio
Coefficient of Permeability

34. AGE AT WHICH CAPILLARIES
BECOME SEGMENTED
W/C RATIO TIME REQUIRED
0.40 3 days
0.45 7 days
0.50 14 days
0.60 6 months
0.70 1 year
over 0.70 Impossible

35. Water Cement Ratio
Strength
/Workability
Workability with
Plasticizer
Effect of W/C Ratio on
Concrete

36. Water Cement Ratio !!
All Said & Done ‘The Man’
with the “Dibba”at the Mixer
Continues to control this vital
factor at most sites. What are
we doing about it?

37. How to Reduce W/C
Ratio?
Use
Plasticisers

38. Plasticisers/ Super Plasticizers
These are workability
enhancers/water reducers
Can be used as accelerators or
retarders
Air Entraining Agents
Must comply with IS 9103

39. Review of use of Bituminous
Products for Waterproofing
Not Compatibleto most building
materials
NotBreathable
Not Resistant to UV Rays

40. Review of use of Bituminous
products for Waterproofing
Uniform Applicationdifficult due to
viscosity
Generally grade 80/100 used instead
of 80/20 or 85/25.
Over coating by tarfelt/polythene
sheets prone to wrinkles & folds

41. Review of use of Bituminous
products for Waterproofing
Subsequent application by different
materials not possible. Coatings have
to be chipped off
Prone to Blistering & Pealing
Not Eco Friendly

42. Prerequisites of Waterproofing
Systems
Breathability
Compatibility
Ease of Application
Flexibility against thermal
movement

43. Prerequisites of Waterproofing
Systems
Wear Resistance
Bonding with substrate
Eco Friendly
Cost effectiveness

44. Selection of Materials
Load carrying capacityof basic
substrate
Criteria forabrasion/chemical
resistance& color
Geometryof surface

45. Selection of Materials….
Slopeand inclination of Roof
Climatic conditionsviz thermal
& rainfall
Level ofGWT & presence of
chemicals

46. Selection of Materials….
Accessibilityduring repair &
service conditions
Crack BridgingCapability
Maintenance requirements&
criteria

47. Stages involved in
Waterproofing
Investigation & Diagnosis
Selection of materials &
systems
Design & specificationsfor the
system

48. Stages involved in
Waterproofing
Application& Supervision
Maintenance

49. CONVENTIONAL SYSTEMS
Mud Phuska & Tiles over Bitumen
Brick Bat Coba/ Lime Terracing
Ferro Cement Topping
Tar Felt Treatment

50. MODERN SYSTEMS
Grouting
Modified Bituminous
Systems
Single Ply Membranes

51. MODERN SYSTEMS
Liquid Membranes
Cementitious Slurries
Joint Sealants

52. Cementitious
Slurries
Non Elastic
Semi Elastic
Elastic
Crystallisation Systems

53. The Condition Before
Ponding of 100mm through
Seepage every Hour

54. Totally Dry within 24
Hours!!

55. Waterproofing by
Crystallization

56. 15mm x 15mm Groove
filled with ‘Penetron’
Mortar covered with
Concave Gola in mortar 1:
4
SPECIFICATIONS FOR BASEMENT
WATERPROOFING FROM OUTSIDE
Note:Polymer modified Non shrink pressure Grouting selectively at the time of testing
PCC 1:4:8
Penetron Application @
500 gm per sq m
A
(Refer
Detail)
DETAIL AT ‘A’
Penetron Application @ 1.4 Kg
per sq m
Sketch 1

57. Is use of Integral WPC Enough?

58. The Cost Factor
Cheapest is not the best
Specifications have to be cost
effectivebut do not compare
with something that is
ineffective

59. For anything good one has to pay
the price
Do not cling to the past for ever.
Time for change has come & it is
now.We have to pay the price.
The Cost Factor

60. Performance of Products
Embarrassment
Dangerous
Responsible Material Supplier
Correct Application Critical
One Man’s Experience when Products Fail!!
Correction of Specifications
Essential
No Problem

61. Why do we Fail?
MENTAL BLOCK
&
LACK OF
ACCOUNTABILITY

62. Col (Retd) Harry Sidhu
[email protected]