„Improvement of properties of grouts for prestressing ... · prestressing tendons and/or ground anchors ... Grout Test method property. Josef Tritthart, Prof. Dubrovnik,

Josef Tritthart, Prof. Dubrovnik, May 21st-24th 2006 International Conference on BridgesJosef Tritthart COST 534 - Final Workshop – Toulouse 19. -22. November 2007

COST 534 COST 534 actionaction „„New Materials and Systems for New Materials and Systems for prestressedprestressed

Concrete StructuresConcrete Structures””

Group project

„Improvement of properties of grouts forprestressing tendons and/or ground anchors“

University of University of TechnologyTechnology,, GrazGraz, Austria, AustriaUniversity of ZagrebUniversity of Zagreb, , CroatiaCroatiaHeriotHeriot Watt University, Edinburgh, UKWatt University, Edinburgh, UK


time, minutes0 2000 4000 6000

curr

ent,

mA

0

10

20

30

40

50

60

70

1-1 2-1 3-1 4-1 5-1 6-1

time, minutes0 1000 2000 3000 4000 5000 6000 7000

curr

ent,

mA

0

20

40

60

80

1-22-23-24-25-26-2


---

after mixing (a0): ≥140 mm; 30 min after mixing (a30) or at

the time specified by the manufacturer:

1.2 a0≥a30 ≥0.8 a0 and a30 ≤140 mm

---Grout spread method(slump)

------at duct outlet time: ≥30 s

------30 min after mixing or at the

end of injection period:≤80 s

------after mixing: ≥30 s

Immersion test

at duct outlet time: ≥10 s

30 min after mixing (t30) or the time specified by

the manufacturer:<25 s

(1.2 t0≥t30≥0.8 t0 )

equal tofib-guideline

30 min after mixing or at the end of injection period:

≤25 s

after mixing (t0):<25 s


after mixing:≤25 s

Cone method

Flowability/ fluidity

fib-guideline (2002)prEN 447 (2005)EN 447 (1996)

RequirementsTest method

Grout property



---

after mixing (a0): ≥140 mm; 30 min after mixing (a30) or at

the time specified by the manufacturer:

1.2 a0≥a30 ≥0.8 a0 and a30 ≤140 mm

---Grout spread method(slump)

------at duct outlet time: ≥30 s

------30 min after mixing or at the

end of injection period:≤80 s

------after mixing: ≥30 s

Immersion test

at duct outlet time: ≥10 s

30 min after mixing (t30) or the time specified by

the manufacturer:<25 s

(1.2 t0≥t30≥0.8 t0 )


30 min after mixing or at the end of injection period:

≤25 s

after mixing (t0):<25 s


after mixing:≤25 s

Cone method

Flowability/ fluidity

fib-guideline (2002)prEN 447 (2005)EN 447 (1996)

RequirementsTest method

Grout property


19.5 / 260.5% IM 120.4011

20.3 / 211% IM1 + 2% Re120.4010

16.5 / 200.35% SP210.409

34 / 440.50% SP3 + 5% SILICA FUME10.408

43.5 / 53.90.20% SP1+ 0.50% Exp420.407

16.5 / 160.20% Sp1 + 1.2 % Exp110.406

15 / 220.20% SP1 + 0.75 % Exp110.405

24 / 240.20% SP110.404

24.5 / 381% IM210.403

34 / 40-10.442

170 / 420-10.401

FLUIDITY (s)ADMIXTURE(%, w/w cement)CEM.w/c#




CEM I; w/z-0,40; without additive

0

20

40

60

80

100

120

0 50 100 150 200

Shear rate (1/s)

She

ar s

tres

s (P

a)

123456


0

20

40

60

80

100

120

0 50 100 150 200

Shear rate (1/s)

She

ar s

tres

s (P

a)

without SP; 1st stepwithout SP; last step0.3% SP; 1st step0.3% SP; last step


0

20

40

60

80

100

120

0 50 100 150 200

Shear rate (1/s)

She

ar s

tress

(P

a)

1% IM 2; 1st step1% IM 2; last step1% IM 3; 1st step1% IM 3; last step


---ending: <24 h

beginning>3 h

beginning: >3 h---EN 196-3Setting

time

after 24 hours: ≤5 %

------Grout density between top and bottom of bleeding tube

Sedimen-tation

after 3 hours of rest:

≤0.3 % of the initial volume

equal tofib-guideline---

Wick-induced test or Inclined tube test

------<2 vol% after 3 h

Glass cylinder (∅ 25 mm; filling height 250 mm

or ∅ 50 mm; filling-height 100 mm)

Bleeding

fib-guideline(2002)

prEN 447(2005)

EN 447 (1996)

RequirementsTest methodGrout

property


V1

Vvolume of bleeded water (V1)

after 3 h = (V1/V)×100%


---ending: <24 h

beginning>3 h


time



Sedimen-tation





------<2 vol% after 3 h



Bleeding

fib-guideline(2002)

prEN 447(2005)

EN 447 (1996)


property



---ending: <24 h

beginning>3 h


time



Sedimen-tation





------<2 vol% after 3 h



Bleeding

fib-guideline(2002)

prEN 447(2005)

EN 447 (1996)


property


7:056:3501.0% Glenium Sky 510

6:005:3500.5% Viscocrete5-000

5:405:0500.3% Melment F 10

6:105:4501.0% Glenium C 323 Mix

6:356:0500.5% Glenium 51

4:504:0041.0% Tricosal 181

7:206:4501.0% Intraplast EP

3:002:406

143

without admixture

CEM I42.5 R

endbeginning

Setting time (h:min)Results of immersion test (mm)

water demand (500 g

cement)

Admixture Cement


------after 24 hours:

between -1% and +5%

Cylinder or can method

between -0.5% and +5%

“when there is no further change in 3 consecutive

readings”

(reading intervals during the 1st hour 15 min, later 30 min)

equal tofib-guideline ---

Wick-induced

testVolume change

fib-guideline(2002)

prEN 447(2004)

EN 447 (1996)

RequirementsTest

methodGrout

property




-1

0

1

2

3

4

5

6

0 50 100 150

Duration of test (min)

Vol

ume

chan

ge (

%)

without Exp 1% IM 2 1% IM 31% Exp 3 0.02% Exp 2 0.1% Exp 2Grout

Documents

„Improvement of properties of grouts for prestressing ... · prestressing tendons and/or ground anchors ... Grout Test method property. Josef Tritthart, Prof. Dubrovnik,