Survey, Investigation and Repairing on Concrete Wall of Waste Water - - PowerPoint PPT Presentation

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Survey, Investigation and Repairing on Concrete Wall of Waste Water - - PowerPoint PPT Presentation

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Survey, Investigation and Repairing on Concrete Wall of Waste Water Treatment Building Partogi H. Simatupang 1 and Jonbi 2 1 Civil Engineering Department, Faculty of Science and Engineering, University of Nusa Cendana 2 Civil Engineering

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Survey, Investigation and Repairing on Concrete Wall of Waste Water Treatment Building

Partogi H. Simatupang1 and Jonbi2

1Civil Engineering Department, Faculty of Science and Engineering, University of Nusa Cendana 2Civil Engineering Department, Faculty of Engineering, Pancasila University

7/17/2018 ICRMCE 2018 1

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Outline Presentation

 Introduction  Methods

  • Survey and Investigation
  • Repairing
  • Pond Testing

 Result and Discussion

  • Concrete Quality and Crack Depth
  • Repairing
  • Pond Testing

 Conclusions

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Introduction

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Waste Water Treatment Building (WWTB) of Multi National Company located in Cikande of Banten Province in Indonesia has experienced a poor function due to seepage and leakage on its reinforced concrete walls

This building used the construction of reinforced concrete walls as high as 12 meters. After construction, there was seepage and leakage on its wall.

The wall was encountered deterioration such as the presence of honeycomb/segregation of concrete and cracks.

Based on the construction report, this deterioration was

  • bserved as a result of uncontrolled slumps so that the slump

value was not complied and the level of compaction was not sufficient at the time of casting.

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Waste Water Treatment Building (WWTB) of Multinational Company located in Cikande, Banten 12 m

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surface area seepage

  • n the wall W1

spot seepage on the wall W2

Lay out of WWTB

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THE INDICATION OF THE SEGREGATION IN CONCRETE

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ALKALINE REACTION HAPPENED Cement based waterproofing was not working

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VERTICAL CRACK SOME CRACKS

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DETAIL – A VERTICAL CRACKS

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HORIZONTAL CRACK AND POROUS AREA

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Methods

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Methods…(cont’d)

  • Investigation

The investigation tests were: (1) Homogeneity test and (2) concrete crack depth measurement using UPV (Ultrasonic Pulse Velocity) method with Ultrasonic Testing Apparatus Proceq model Pundit Plus

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Methods…(cont’d)

  • Repairing

Methods of repairing conducted were: (1) injection of cracks with Epoxy, (2) injection of leaks with cement modified polymer material, and (3) waterproofing coating with a cement based material

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Methods…(cont’d)

  • Testing on the repairing

structure by pond testing The WWTB construction was tested by pond testing for 14 days. During the ponding process, a thorough observation

  • f the concrete wall was conducted to see

whether the seepage or leakage still

  • ccur or not
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Result and Discussion

  • Survey and Investigation

No Location/Wall V uniformity of concrete quality (km/sec) 1 Vertical/wall W12 3,24 pretty good 2 Horizontal/wall W12 2,34 enough 3 Horizontal/wall W1 3,05 pretty good 4 Vertical/wall W1 3,32 pretty good 5 Vertical/wall W3 2,99 enough

From the results of crack depth testing of wall W1, the average crack depth of 102.5 mm was obtained

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Result and Discussion…

  • Crack Injection

The steps of Crack injection were (1) cleaning the crack surface from dust and other dirt, (2) cutting the crack, (3) setting an injection nipple, (4) injecting the epoxy, and (5) cleaning the surface with a grinder

  • Repairing
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Result and Discussion…

  • Leakage Injection
  • Repairing

The steps of leakage injection were (1) cleaning the crack surface from dust and other dirt, (2) cutting the crack, (3) setting injection nipple, (4) injecting the cement modified polymer material , and (5) cleaning the surface with a grinder

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Result and Discussion…

  • Waterproof Coating
  • Repairing

The steps of waterproof coating were (1) cleaning the crack surface from dust and other dirt, (2) applying waterproof coating for 1 layer, and (3) applying waterproof coating for 2 layers perpendicularly

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Result and Discussion…

  • Pond Testing

The pond testing was conducted for 14 days. Based on the test results, there was no leakage and seepage during the pond

  • testing. WWTB was ready to use
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Conclusion

 The leakage and seepage of WWTB were caused by

the inadequate quality of concrete work

 Investigation conducted using UPV Testing showed

that the quality of concrete was enough and pretty good quality and the crack depth of 102.5 mm

 The repairing methods using crack injection, leak

injection and waterproof coatings were performed successfully

 This was proved by no leakage and seepage during

the pond testing for 14 days

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THANK YOU FOR YOUR ATTENTION

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