SAMARIS Creep test

1
SAMARISCreep test

• Meeting at TRL 2-3 March 2005

2
Time schedule

• Sample reception
• LAVOC cores December 2004
• DRI slabs February 2005
• Test program
• Sample preparation (coring and cutting) February
  05
• Density measurement
• Creep test
• At 50C February-March 05
• At additional TC to be discussed
• Binder information ?

3
Creep test conditions (1/2)

• European standard PrEN 12696-25
• Method A uniaxial cyclic compression test with
  confinement
• Method B triaxial cyclic compression test
• British Standard BS 598-111
• Unconfined uniaxial loading test
• Internal Shell protocol
• Performed on the NAT
• Sample size 100 mm Diam 60 mm Height
• Normal stress 100kN
• Temperature 50C
• Pulse time 0.2s loading 1.8s rest

4
Creep test conditions (2/2)
PrEN 12607-25 (confined or triaxial) BS 598-111 (static load) Shell protocol
Sample size D / H 148 mm D 60 mm H 100, 150 or 200 40 to 100 mm 100 mm D 60 mm H
Normal stress 100 kPa 100 kPa 100 kPa
Temperature 40C (typical) 30C 50C
Pulse 1s (0.5Hz) 3600 pulses 3600 s 0.2s 1.8s
5
Sample preparation

• From LAVOC material Done
• 2x9 cores 90mm diam (not 100mm)
• Layer sawing in order to have
• Surface layer 2x30mm thick
• Base layer 60mm thick
• From DRI material Under progress
• 2 slabs
• Coring
• Layer sawing as for LAVOC

6
Preliminary measurements (1/3)

• Density measurement (for the time being for LAVOC
  only)
• Require information on mix characteristics
  (density, composition, )
• Slight difference between base and surface layers
• Scattering of results (higher for surface than
  base)

Impact of test results
7
Preliminary measurements (2/3)
8
Preliminary measurements (bis)
9
First creep test result for LAVOC

• Base layer
• Excellent behaviour
• Longer test required
• Surface layer
• Lower behaviour
• Breakdown of certain sample

10
Next step

• Creep test on the DRI material at 50C
• Further information on mixture
• Coefficient calculation
• Binder data (viscosity of fresh binder) ?
• To be discussed
• Test at another temperature? Other conditions?