development & application of new repair/reinforcement ... of new... · ref.) j. of adv. conc....

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Development & Application of New

Repair/Reinforcement Materials with

Self-healing Capability for

Social Infrastructures

Tae-Ho Ahn1,2,3, Norihiko Ogura1, Chien-Wen Huang1

Hiroshi Nishi1, Hideki Manabe1, Toshiharu Kishi3

1CORE Institute of Technology Corp. OSAKA JAPAN 2International Sustainable Engineering Materials (ISEM) Center,

Hanyang University, SEOUL, KOREA3Institute of Industrial Science, The University of Tokyo, JAPAN

International Symposium on Road Excavation and Underground Pipeline Burying in Kaohsiung City, 2018

The University of Tokyo, Japan

1923년관동대지진에도건전


http://www.hanyang.ac.kr/

http://www.hanyang.ac.kr/

2

Institute of Industrial Science

(2012.9.13)


3

What is the Land Subsidence

of Asia Mega Cities?

Underground Social Infrastructures

Natural Disasters

Sink hole

Land subsidence

Pothole in Roads

Super tall buildings

Ground/Soil Reinforcement

Subway Constructions

Sewerage Systems

Pipe lines (Oil, Gas, Electric systems)

Damages by

Ref. SNU 2015.8


4

Various Land Subsidence in Korea

Development of Underground Spaces

Decrease of Groundwater Level

Land Subsidence Caused by

Ref. SNU 2015.8

Various Land Subsidence in Korea


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Major Causes of Land Subsidence

1) Sink Hole (Geologic Phenomenon)

2) Inappropriate Underground Excavation Construction

3) Decrease of Groundwater Level

4) Frost Heaving Phenomenon

5) Pothole in Roads

6) Damage of Sewerage System (Deterioration)

7) Earthquake, Soft Ground Condition, Liquefaction

Construction Area

Water leakage

Inappropriate Underground Excavation Construction


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Frost Heaving Phenomenon & Pothole

Frost Heaving Phenomenon

Pothole

Damage of Sewerage System(Deterioration)

About 5,000 Km

Water Supply 5%

Sewerage 48%

Over 30 years

(Old Concrete Sewer)


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Increment of Land Subsidence

Increment of Land Subsidence in case of Korea

(Accident Amounts of Seoul City)

Big

Disaster

2010 2011 2012 2013 2014 2015 2016 2017 year

Ref. SNU, Korea

Why Increment of Land Subsidence?

구분 현재의시장규모(2013년) 예상시장규모(2015년)

세계시장규모 158조 173조이상

국내시장규모 3조 7천억원 4조 2천억원이상

산출근거 1.프라도니아(시장조사전문업체) 2.대한시설물유지관리협회(입찰사례모음)

Learning from USA, Japan and Korea


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Necessity of NDI on the Road

Necessity of NDI on the Pipe line


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Monitoring of Seoul City

Disaster Prevention

(High Durability Materials)

(High Functional Construction)


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•What is Self-Healing Concrete for the maintenance &

repairing?(Sustainable concrete)

-Crack width : 0.1 mm ~ 0.3 mm

- International Patents (3) (PCT/JP2009, 2010, 2011)

- US Patent, KR Patent, JP Patent, CN & EP Patent pending

- Research Co-works

1) The University of Tokyo, IIS

2) Yokohama National University

3) East Japan railway Company

4) Sumitomo Osaka Cement (SOC)

How long can we use concrete structures?

Tunnel Water leakage

SlabBottom side

Water leakage

Necessity of SHC Research


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Water leakage after casting using normal concrete

Life Cycle Cost of Infrastructures

Time

Per

form

ance

Smart repair system

(Self-repair after minor damage)

• Self healing Design [Smart Design]

Maintenance free method

Time

Per

form

ance

Man made repair

• Traditional Design [ Life Cycle ]

Safety limitation of performance

•Underground Infrastructure• Leakage of Water• Deterioration by cracks Time

Cost

High durability design

Conventional design• Materials Science• Chemical Science• Construction Eng. Tech.

Cost Effective Method [Target]

Time

Cost

Ref.) J. of Adv. Conc. Tech. Tae-Ho AHN & T. KISHI (2010. 08)


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Application of Self-Healing Concept on Concrete

Ref) Self-healing Concrete with Various

Mineral Admixtures

(The University of Tokyo, 2008)

• Application Concept I• Mineral admixtures • USA patent , Japan patent, Korea Patent• China, European

Ref) WaterProofing materials

(The University of Tokyo, 2011)

• Application Concept II

• Repair mortar materials

Self-healing Concrete Self-healing Repair Materials

Research Process of Self-healing

Mineral Admixtures at the UT2008. 3200520011997

• Low W/B ratio

• Expansive agent system

First period

• Re-expansion

• Re-hydration of unhydrated

cement particles

• Concrete with self-sealing

performance

• Crack width 0.2mm

( Self-healing after one month)

• Cost problems

• Maintain of performance

• Normal W/B ratio

• Expansive agent system• Pozzolanic materials• Calcium Carbonate system

Second period

• Normal W/B ratio

• Composite system

Third period

• Concrete with self-sealing

performance

• Crack width 0.4mm (possibility)

( Self-healing after 3-7 days)

•Cost effectiveness

• Increment of durability

Cost down


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OPC

Expansion term

(CSA agent)

Swelling term

(Geo-materials)

Wate

r pro

ofi

ng c

on

cept

Precipitated term

(Chemical additive)

Third period design concept using various component systems

[1] Expansion Reaction [2] Swelling Reaction


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Japan East Railway Company, Japan (2007~ )

Tokyo Metro Corporation (2008~ )

Japan Steel Company (2017~ )

•Vibrator

•Water proof

•sheets

•For

m

•Window

•Concrete

•Window

•Water proof

•sheets

•(a) Work area (between water proof sheet and steel form) • (b) Working window

Casting process between wall pasted water proof sheet and steel form by workers with vibrator


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Self-healing

concreteGeneral concrete

2014.01 (5 years, Winter season)

New Repair Method of Remodeling

Concrete

Development of New Surface treatment Repair Technology

Injection Methods

Repair of Micro cracks


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Application (in Japan) – Field test (2014. 02. 25)

実現場における試験施工

(a) Cracks (b) Surface treatment (c) Drilling

(d) Masking(e) Reactive Control Agents(f) Filling

(g) After repair

Application for concrete slabs of railroad viaduct with water-leakage

cracks (Shinkansen)


06.pptx

06.pptx

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施工直後 (2011/8/23)

施工後 2日経過 (2011/8/25)

施工後 7日経過 (2011/9/1)

施工後 1ヶ月経過 (2011/9/22)

施工後 2ヶ月経過 (2011/10/31)

施工後 3ヶ月経過 (2011/11/29)

施工後 4ヶ月経過 (2011/12/7)

施工後 5ヶ月経過 (2012/1/19)

•JR現場の試験施工結果の観察結果（充填・塗布工法）

Application (in Japan) – Field test (2014. 02. 25)


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High Durability Concrete under Sulfuric Acid Conditions

Normal Concrete High Durability Concrete

Deterioration of Concrete Products

Deterioration of Concrete Products

1. Formation of Gypsum with Ca(OH)2 and C-S-H under the Sufuric Acid Conditions

2. Volume Expansion of Gypsum (1.2 - 2.2 times)

3. Volume Expansion 2 – 7 Times after Formation of Etrringite with C3A


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Status of Concrete Technologies

New Type Concrete Products

Actual Application of New Types


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Ground/Soil Reinforcement

Earthquake-Resistance Reinforcement


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3D Underground Information Seoul Map

New Self-Healing Patching Materials


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Why? New type Concrete under Oil Condition

Serious Working Condition


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Oil

+ Water Leakage

Fire Protection

Environmental Problem

Health Problem (Worker) - Smell



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Commercialization – AO typeJapan Patent Pending

Actual Application of AO type


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•Thank you very much!

• CORE Institute of Technology Co. Ltd. Osaka Japan

www.coreit.co.jp

International Sustainable Engineering Materials (ISEM) Center,

Ceramic Materials Institute, Hanyang University, Seoul Korea

Institute of Industrial Science, The University of Tokyo, Japan

www.iis.u-tokyo.ac.jp

• [email protected]

Crack Self-healing Concrete


http://www.coreit.co.jp/

http://www.iis.u-tokyo.ac.jp/

mailto:[email protected]

development & application of new repair/reinforcement ... of new... · ref.) j. of adv. conc....

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