Presentation Experience With RCM-TEM Method

7/21/2019 Presentation Experience With RCM-TEM Method

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Benelux

Results RCM - TEM testmethods

Reason for research by ENCI

• Durabililty design service lifetime concrete structures

u! tot "## years$

• RCM testmethod in Duracrete model

• Dutch standardcommittee %C&'$

develo!ment of !r(tandard on durability design

M e a n s e r v ic e l i f e

S e v i c e l i fe d i s t r ib u t io n

T im e

F a i lu r e p r o b a b i li ty

T a rg e t s e r v ic e li f e

D i s t ri b u t i o n o f S ( t)

S ( t )

R ( t )

R , SP f

P

f

D is t r ib u t io n o f R ( t )



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−−=

cl

cl

R

n

cl cl ecl c

d d

cl s

d

cr

t t t Dk k

xerf cc g

γ 00,,,

,

2

1

Probabilityof initiationof corrosionof < !"

#####

C ( x ,t ) = C s – ( C s - C i ) e r f

( x / 2 { K t o t D 0

t ( t 0 / t ) n C l } )



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Testing !rogram by ENCI

)ur!ose*• To gain ex!erience +ith RCM-method,

• )erformance of ENCI-cements,

• udge the figures in the conce!t of %C &'• Correlation RCM . TEM

• Influence of several concrete technological$ !arameters

min/ '# mmmin/ '# mmmin/ '# mmmin/ '# mmmin/ '# mmmin/ '# mmmin/ '# mm

Opp.

h o o g t e

A

V

R≈

Opp.Opp.

h o o g t e

A

V

R≈



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D00R122M3EID %2N C4N(TR0CTIE5 BET4N METBETRE66IN7 T4T C384RIDE-7E9NITIEERDE:2)ENIN7(C4RR4(IE8eidraad voor het formuleren van !restatie-eisen

Technical Report (VC81):

Results of calculations based on Duracrete-odel :

! includin" en#ironental, aterial and curin" paraeters$

! initial chloride-content % 0,1 & ' - and critical chloride-content % 0,& ' to ceent$

! urface chloride-content 1, & for atosferic conditions and *,0 & for +2 and +*$

! ncludin" safet ar"e on concrete co#er of 1., (re/nforceent) and 2., (pre-stressed)



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)rogram•

Re!eatability of the RCM-test and TEM• Influence of several concrete technological !arameters*

• )re!aration sam!le cast cilinder vs/ drilled$

• Maximum aggregate si;e '< mm versus "= mm$

• )erformance of ENCI-cements

• Ratio of blastfurnace slag• Curing time

• 3ardening tem!erature

• (am!le age hydration$

• :atercement-ratio• Relation RCM - TEM



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Concrete/• Cast cilinders

• 2ggregate grading 2B'< Dmax > '<mm$

• Consistancy Class (?

• Environmental class @(?

• :cf #A=, cement ?"# gm?

Testmethod.

• RCM* NT Build " results are average out of <$

• TEM* results are average out of ?$older, R , 2000, Draft R345 Technical Recoendation Test ethods for on site

easureent of resisti#it of concrete, 5aterials and tructures, Vol **, 60*-611



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RCM - testmethod



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RCM - testmethod



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Re!eatability

six results, CEM I ="A=N$


Reference-cement CEM I 52,5N:

6 (x6 re!"#t! $"r%ng comp#ete te!t%ng per%o$

Average: 10,9 * 10-12 m2/s

Standard deviation: 1,75 * 10-12 m2/s

LL = ,! * 10-12 m2/s

"L = 15,2 * 10-12 m2/s

#$% = 1& '

Average: 91, ohm.m

Standard deviation: ohm.m

#$% = 9'



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)re!aration sam!ledrilled vs/ castingA CEM I ="A=N$




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2ggregate si;e

'< vs/ "= mmA CEM I ="A=N$




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)erformance ENCI-cement




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Ratio of ground granulated blastfurnace slag




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Curing time

'A ?A F en "& days under +ater, and than "#GCA <#H R% till "& days$




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3ardening tem!erature=CA "#C en ?=C testing by eJual maturity$




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(am!le age hydration$"&A =<A 'A '&" dg/ en ' Kr/$




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(am!le age hydration$

"&A =<A 'A '&" dg/ en ' Kr/$



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:ater Cement ratio#/= versus #/== including variable ratio ofggbfs$




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Correlatie RCMTEM




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Correlation RCMTEM



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#on()sion:

! +# is not dis(riminating or (on(rete ith )ended

(ements ggs and a! +#-testing at 2-da3s is navora)e or )ended (ements

! T4 is not dis(riminating or (on(rete ith #4 .

R l R d R bi RCM



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4bKective*

Comp&re te!t re!"#t! of $%fferent #&'or&tor%e! ().

Concrete !&mp#e! m&$e '* one pro$"cer (prec&!t

Concrete '#oc+! ) x ) x 5 cm

Results Round Robin test on RCM

Concrete mix ' Concrete mix "

Cement CEM I ="A= R CEM III2 ="A= N

:CR #A=# #A=7rading # . ?" # . '<

(trength class C=== C==<F

R lt R d R bi t t RCM



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Average: 7,09 * 10-12 m2/s

Standard deviation: 1,56 * 10-12 m2/s

#$% = 22 '




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Average: 2,!& * 10-12 m2/s

Standard deviation: 0,&! * 10-12 m2/s

#$% = 2& '




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R lt RCM t t th d



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4ther !arameters that may effect RCM - result

North-(ea 7ravel and sand L

Results RCM - testmethod

R lt RCM t t th d



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(teel-fibres


4ther !arameters that may effect RCM - result

R lt RCM t t th d



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4ther !arameters that effects RCM - result


(teel-fibres acts as a sacrifice anode,

No chloride-migration at all OO

Documents

Presentation Experience With RCM-TEM Method