Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group...
-
Upload
sage-gauntlett -
Category
Documents
-
view
222 -
download
5
Transcript of Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group...
![Page 1: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/1.jpg)
Rak-43.3312 Repair Methods of Structures IIPlanning of Condition Survey and Repair Measures
Group 19
Sanjay SreekalaBurak ErkanGhaffar Khan
12.02.2014Petri MutanenKari ParilaKim Warma
Group Members
![Page 2: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/2.jpg)
Agenda
I. Introduction
II. Condition Survey Methods
III. Condition of the Case
IV. Further Research Needed
V. Proposed Principled Repair Methods and Estimated Remaining Service Life
VI. Discussion
VII. Conclusion
![Page 3: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/3.jpg)
I. IntroductionGeneral
• Location: Töölö, Helsinki• Residential building
– 7 storeys– 52 rental apartments
• Sheltered location and light traffic
• Technical documents not available– No exact data of the condition– No previous condition surveys More theoretic point of view
• HUT research team visit in 2003-2004– list of anticipated deterioration mechanisms
![Page 4: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/4.jpg)
![Page 5: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/5.jpg)
![Page 6: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/6.jpg)
I. IntroductionFaçade properties
• Rough cast made on brickwork• Light brown color• Two facades
– Main façade facing south-west– Courtyard façade facing north-east
• Balconies on six storeys– Concrete slab with precast concrete railings
• Major façade renovation made in 1997– External rendering with an insulation layer
![Page 7: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/7.jpg)
II. Condition Survey Methods
• Visual evaluation and assessment
– Frost damage
– Brick spalling
– Peeling of external rendering
– Cracking of concrete
– Pipe corrosion
![Page 8: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/8.jpg)
II. Condition Survey Methods
• Formation of organic moss
– Mechanical damage
• External wall insulation
rendering
• Visual assessment data
– Considerable moss growth on
façade
– Cracking and contamination in
balconies
![Page 9: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/9.jpg)
II. Condition Survey Methods
• Frost deterioration of external rendering
• Joint degradation and pipe corrosion
• Evidence of carbonation and structural steel corrosion
in the past
• Crack development in footing
• broken tiles at the building entrance
![Page 10: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/10.jpg)
II. Condition Survey Methods
• Overall performance of the building satisfactory
• Structural integrity not affected
• Minor repairs needed to ensure full efficiency
![Page 11: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/11.jpg)
III. Condition of the Case
• More than 50 years old
• Condition is relatively good
• Better than in many younger buildings
• No special conservation status
• Major repairs possible
• The current condition can be easily maintained
• The condition can be improved by new repairs
![Page 12: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/12.jpg)
III. Condition of the Case
• Small signs of deterioration visible in several parts of the facade
• None of them is overwhelmingly severe• But they will become worse is nothing is done• Before the last renovation new insulation was needed.• Also the rendering needed repair• Now the mortar is in satisfactory condition
![Page 13: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/13.jpg)
III. Condition of the Case
• There are many minor and some major cracks• Evidence of moisture, especially near he windows• Mainly aesthetic problem, but in some spots more
severe, mold?• Contamination is generally light• Footing has some cracks, level is light• Mechanical damage
![Page 14: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/14.jpg)
III. Condition of the Case
• Floor tiles cracked• Peeling off has started, average level• Degradation of joints, not always visible• Balconies are in worst condition, even after last
renovation• Moisture and joints are clearly deteriorated• Balcony slabs are the biggest concern• The Souts-West facade is more damaged
![Page 15: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/15.jpg)
III. Condition of the Case
• Older data revealed structural deterioration:– Carbonation– Reinforcement steel corrosion– Frost damage– Some parts of the structure do not need attention, e.g. the
bricks
• More infromation should be gathered before the next repair
![Page 16: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/16.jpg)
IV. Further Research Needed
• Investigating the previous condition surveys– Research done according to visual inspection, provided Excel
sheet and theorotical knowledge
• No visual dimensional defects– Possible bowing of rendering in higher elavations
• Terrestial laser scanning
• Existing defects observed during visual inspection– Frost Damage, Peeling of ext. Rendering, Cracking of Concrete
and Moist• Thin Section Analysis• Carbonation and Chloride levels
![Page 17: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/17.jpg)
IV. Further Research Needed
• Tensile Strenght Testing• Bonding Condition of Facade
– Nothing seen durin the visual inspection• Hammering Technique
• Asbestos Analysis– Since no backgroung information available, it is still a question– Although last renovation done 17 years ago. It Shall be checked
in order to be on safe side
![Page 18: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/18.jpg)
V. Proposed Principled Repair Methods and Estimated Remaining Service Life
Elastic expansion jointApplying new coating
![Page 19: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/19.jpg)
V. Proposed Principled Repair Methods and Estimated Remaining Service Life
Base plate Down pipes and nearby structures
![Page 20: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/20.jpg)
V. Proposed Principled Repair Methods and Estimated Remaining Service Life
Mortar patching for footing and applying new coating
Replacement or surface treatment of wooden material
![Page 21: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/21.jpg)
V. Proposed Principled Repair Methods and Estimated Remaining Service Life• Option A
– Low-cost repair method
– Insecurity with the long-term efficiency
– Relatively cheap and quickly done
– Service life from 10 to 15 years.
![Page 22: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/22.jpg)
V. Proposed Principled Repair Methods and Estimated Remaining Service Life1. Material tests
2. Removing deterioration factor
3. Removing deteriorated mortar parts and applying mortar patching
4. Refining old coating and appyling new coating.
![Page 23: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/23.jpg)
V. Proposed Principled Repair Methods and Estimated Remaining Service Life• Option B
– High costs
– Long-term efficiency reliable.
– Working and environment safety plans are needed.
– Service life up to 30 years.
![Page 24: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/24.jpg)
V. Proposed Principled Repair Methods and Estimated Remaining Service Life1. Removing deterioration factor
2. Demolition of old surface rendering
3. Cleaning of the visible surface
4. Strengthening of the under layer
5. New surface rendering
6. Coating of the rendering
![Page 25: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/25.jpg)
VI. Discussion
• Overall building in Satisfactory Condition.– Aesthetic Damages (frost damage, brick spalling, peeling of
external rendering, cracking of concrete, pipe corrosion, mould, mechanical damages, discoloration etc)
– Footing has cracks– Degradation of joints (needs attention)– Possible Carbonation and Steel Corrosion (previous survey)
![Page 26: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/26.jpg)
VI. Discussion
• No need for demolishing• Building can survive without repairs for the time being
(No desirable)• Further research / survey needs to be conducted
![Page 27: Rak-43.3312 Repair Methods of Structures II Planning of Condition Survey and Repair Measures Group 19 Sanjay Sreekala Burak Erkan Ghaffar Khan 12.02.2014.](https://reader035.fdocuments.net/reader035/viewer/2022062417/55178e3d5503460e6e8b586f/html5/thumbnails/27.jpg)
VII. Conclusions
• New Condition Survey should be conducted- This will determine future action
• Minor repairs needed• Repairs done in 1997 needs to be checked• Some critical areas needs detailed testing and possible
counter measures