Pro te c tive Co a ting o f Ac c e ss Cha mb e rs Ma nho le s Ma - - PowerPoint PPT Presentation

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Pro te c tive Co a ting o f Ac c e ss Cha mb e rs Ma nho le s Ma - - PowerPoint PPT Presentation

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Pro te c tive Co a ting o f Ac c e ss Cha mb e rs Ma nho le s Ma inte na nc e Ho le s Utility Ho le s Ac c e ss Cha mb e rs Utility Va ults Ma nho le a s % o f T o ta l Se we r Are a Ma nho le Dia me te r: 1050mm Pipe

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SLIDE 1

Pro te c tive Co a ting o f Ac c e ss Cha mb e rs

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SLIDE 2
  • Ma nho le s
  • Ma inte na nc e Ho le s
  • Utility Ho le s
  • Ac c e ss Cha mb e rs
  • Utility Va ults
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SLIDE 3

Ma nho le a s % o f T

  • ta l Se we r Are a

Pipe line Diame te r 150mm 225mm 300mm Distanc e be twe e n manhole s 50m

30% 22% 17%

60m

26% 19% 15%

70m

23% 17% 13%

Ma nho le Dia me te r: 1050mm Ma nho le De pth: 2.5m

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SLIDE 4

Ma nho le I nfiltra tio n

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SLIDE 5

Po te ntia l Re a so ns fo r Ma nho le De te rio ra tio n

  • L

e a king jo ints

  • I

nfiltra tio n thro ug h lo o se mo rta r a nd pre - c a st jo ints

  • L

e a ks a ro und pipe e nds

  • Cra c ks in the struc ture
  • Co rro sio n
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SLIDE 6

Po te ntia l Re a so ns fo r De te rio ra tio n

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SLIDE 7

Po te ntia l Re a so ns fo r De te rio ra tio n

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SLIDE 8

Ma nho le s a re b e c o ming pla stic

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SLIDE 9

Ma nho le Re ha b ilita tio n Co ntra c t

  • I

nve stig a tio n / Asse ssme nt

  • Re c o mme nda tio ns
  • Do the Wo rk
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SLIDE 10

Cla sse s o f Ma nho le Re ha b ilita tio n

  • Sa c rific ia l Pro te c tive Co a ting

– Ce me ntitio us Pro duc ts

  • Pe rma ne nt Pro te c tive Co a ting

– Po lyure a / E po xy / Po lyure thane s

  • Re -Build Co a ting

– E po xy Mo rtar

  • Re c o nstruc tio n
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SLIDE 11

De te rmining the Appro pria te So lutio n

De pth of L

  • ose

Mate r ial Re move d Solution

0 – 20mm Struc tura l inte g rity o f the a c c e ss c ha mb e r is still inta c t. Pro te c tive Co ating 20mm – up to ste e l re info rc ing Struc tura l inte g rity is c o mpro mise d a nd struc tura l re pa ir is ne c e ssa ry. Re b uild Co ating : Be yo nd ste e l re info rc ing Co mple te Re b uild o r re pla c e me nt.

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SLIDE 12

Re sto re b e fo re its to o la te …

200 400 600 800 1000 1200 1400 1600 1800 2000 Cost ($/ m2) Nothing Pr

  • te c tive

Coa ting Re build Coa ting Comple te Str uc tur a l Re build

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SLIDE 13

De te rmining the Appro pria te So lutio n

Oppo rtunity fo r pe rso n a c c e ss to de te rmine the e xte nt o f the de te rio ra tio n

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SLIDE 14

Co nditio n Asse ssme nt

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SLIDE 15

Ma nho le Asse ssme nt Re po rt

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SLIDE 16

Co nditio n Asse ssme nt Re po rt

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SLIDE 17

Co nditio n Asse ssme nt Re po rt

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SLIDE 18

Co nditio n Asse ssme nt

S604

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SLIDE 19

Co nditio n Asse ssme nt Re po rt – Co re Sa mple s

S604

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SLIDE 20

Co nditio n Asse ssme nt

S601

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SLIDE 21

Co nditio n Asse ssme nt Re po rt – Co re Sa mple s

S601

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SLIDE 22

Co nditio n Asse ssme nt

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SLIDE 23

Co nditio n Asse ssme nt

S807 Wa ll

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SLIDE 24

Co nditio n Asse ssme nt

S807 Ba se

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SLIDE 25

Co nditio n Asse ssme nt Re po rt – Co re Sa mple s

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SLIDE 26

Pre pa ring the Surfa c e Re mo ve the de te rio ra te d c o nc re te

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SLIDE 27

Surfa c e Pre pa ra tio n

g

1 3 2 4

FIGURE 1

200mm

Co nc re te surfa c e must b e ha rd

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SLIDE 28

Surfa c e Pre pa ra tio n

Co nc re te surfa c e must b e c le a n

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SLIDE 29

Surfa c e Pre pa ra tio n

Co nc re te surfa c e must b e a c id ne utra lise d

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SLIDE 30

Applic a tio n Co nditio ns Sub stra te surfa c e mo isture me a sure me nt

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SLIDE 31

Applic a tio n Co nditio ns Amb ie nt Humidity a nd T e mpe ra ture

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SLIDE 32

Applic a tio n Co nditio ns Surfa c e T e mpe ra ture

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SLIDE 33

Pro te c tive Co a ting – Po lyure a

  • Spra y a pplie d
  • Ultra fa st c uring re sin
  • T
  • ug h a nd ha rd

we a ring

  • Wa te r tig ht
  • Che mic a lly re sista nt
  • F

le xib le – c a n ha ndle vib ra tio ns

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SLIDE 34

Po lyure a Applic a tio n

Stage 1:Apply Epoxy Primer Apply to test piece to be left in manhole

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SLIDE 35

Po lyure a Applic a tio n

Prime r Cure T e st Duro me te r me a sure s surfa c e ha rdne ss in 5 pla c e s

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SLIDE 36

Po lyure a Applic a tio n

Spra y po lyure a c o a ting a t 3mm thic kne ss

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SLIDE 37

Po lyure a Applic a tio n

Ha s it c ure d? Me a sure ha rdne ss

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SLIDE 38

Po lyure a Applic a tio n

Ha s it a dhe re d?

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SLIDE 39

Po lyure a Applic a tio n I nspe c t fo r pinho le s, b ub b le s

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SLIDE 40

Po lyure a Pro pe rtie s

  • Che mic a l Re sista nc e : Hig h (pH 2 to 12): I

SO175

  • Ab ra sio n Re sista nc e : AST

M D460 1,000 c yc le s – Po lyure a: <6mg – PVC: 25mg – E po xy: 50mg

  • E

lo ng a tio n: 425%: AST M D412

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SLIDE 41

Po lyure a Pro pe rtie s

  • Ha rdne ss: (Sho re D) 60: AST

M D2240

  • I

mpa c t Re sista nc e : (hig h): AST M G14

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SLIDE 42

Po lyure a

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SLIDE 43

Re b uild Co a ting : E po xy Mo rta r

  • Ge ne ra l purpo se e po xy

b a se d re b uild

  • 20mm sta nda rd thic kne ss
  • Applie d b y ha nd / spra y
  • T
  • ug h a nd ha rd we a ring
  • Wa te r tig ht
  • Che mic a lly re sista nt
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SLIDE 44

Re b uild Co a ting : E po xy Mo rta r

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SLIDE 45

E xa mple : Orig ina l Co nditio n

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SLIDE 46

E xa mple : Afte r Je tting

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SLIDE 47

E xa mple : Co mple te d

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SLIDE 48

E po xy Mo rta r Pro pe rtie s

  • Co mpre ssive Stre ng th: 60MPa
  • Che mic a l Re sista nc e : pH 2 to pH 12 I

SO 175

  • Ha rdne ss : (simila r to c o nc re te )
  • Adhe sio n to c o nc re te : 3.5MPa (c o nc re te fa ils)
  • Ab ra sio n Re sista nc e : ma ny time s hig he r tha n c o nc re te
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SLIDE 49

E po xy Mo rta r Pro pe rtie s

  • Yie ld Stre ng th

– E po xy Mo rtar: 22MPa – PVC: 45MPa – Co nc re te : 3 – 5MPa

  • Sho rt T

e rm Mo dulus – E po xy Mo rtar: 4,200MPa – PVC: 3,200MPa

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SLIDE 50

Summa ry

  • An impo rta nt c o mpo ne nt o f c o mple te se we r

re ha b ilita tio n

  • Se pa ra te Pro te c tio n a nd Re pa ir So lutio ns a re

a va ila b le . E a rly inte rve ntio n le a ds to $ sa ving s

  • Pro pe r c o nditio n e va lua tio n ne e de d
  • Pro pe r surfa c e pre pa ra tio n ne e de d fo r suc c e ss
  • T

he se syste ms o ffe r pe rma ne nt pro te c tio n

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SLIDE 51