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

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 line Diame te r Ma nho le De pth: 2.5m 150mm 225mm 300mm 50m 30% 22% 17% Distanc e be twe e n 60m 26% 19% 15% manhole s 70m 23% 17% 13%

Ma nho le I nfiltra tio n

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

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

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

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

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

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

De te rmining the Appro pria te So lutio n De pth of L oose Solution Mate r ial Re move d Struc tura l inte g rity o f the a c c e ss c ha mb e r is still inta c t. 0 – 20mm Pro te c tive Co ating Struc tura l inte g rity is c o mpro mise d a nd 20mm – up to ste e l struc tura l re pa ir is ne c e ssa ry. re info rc ing Re b uild Co ating : Be yo nd ste e l Co mple te Re b uild o r re pla c e me nt. re info rc ing

Re sto re b e fo re its to o la te … 2000 1800 1600 1400 1200 Cost 1000 ($/ m2 ) 800 600 400 200 0 Nothing Pr ote c tive Re build Comple te Coa ting Coa ting Str uc tur a l Re build

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

Co nditio n Asse ssme nt

Ma nho le Asse ssme nt Re po rt

Co nditio n Asse ssme nt Re po rt

Co nditio n Asse ssme nt Re po rt

Co nditio n Asse ssme nt S604

Co nditio n Asse ssme nt Re po rt – Co re Sa mple s S604

Co nditio n Asse ssme nt S601

Co nditio n Asse ssme nt Re po rt – Co re Sa mple s S601

Co nditio n Asse ssme nt

Co nditio n Asse ssme nt S807 Wa ll

Co nditio n Asse ssme nt S807 Ba se

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

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

Surfa c e Pre pa ra tio n g FIGURE 1 200mm 1 Co nc re te surfa c e must 3 b e ha rd 2 4

Surfa c e Pre pa ra tio n Co nc re te surfa c e must b e c le a n

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

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

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

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

Pro te c tive Co a ting – Po lyure a • Spra y a pplie d • Ultra fa st c uring re sin • T o 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

Po lyure a Applic a tio n Stage 1:Apply Epoxy Primer Apply to test piece to be left in manhole

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

Po lyure a Applic a tio n Spra y po lyure a c o a ting a t 3mm thic kne ss

Po lyure a Applic a tio n Ha s it c ure d? Me a sure ha rdne ss

Po lyure a Applic a tio n Ha s it a dhe re d?

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

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

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

Po lyure a

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 o ug h a nd ha rd we a ring • Wa te r tig ht • Che mic a lly re sista nt

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

E xa mple : Orig ina l Co nditio n

E xa mple : Afte r Je tting

E xa mple : Co mple te d

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

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

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