1. SAMARIS Creep test Meeting at TRL 2-3 March 2005

2. SAMARIS March 2005 – State of creep test program 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 50°CFebruary-March 05 - At additional T°C to be discussed Binder information ?

3. SAMARIS March 2005 – State of creep test program 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 stress100kN  Temperature50°C  Pulse time 0.2s loading + 1.8s rest

4. SAMARIS March 2005 – State of creep test program 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 Temperature 40°C (typical)30°C50°C Pulse 1s (0.5Hz) 3600 pulses 3600 s0.2s + 1.8s

5. SAMARIS March 2005 – State of creep test program 5 Sample preparation From LAVOC materialDone  2x9 cores 90mm diam (not 100mm)  Layer sawing in order to have - Surface layer 2x30mm thick - Base layer 60mm thick From DRI materialUnder progress  2 slabs  Coring  Layer sawing as for LAVOC

6. SAMARIS March 2005 – State of creep test program 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. SAMARIS March 2005 – State of creep test program 7 Preliminary measurements (2/3)

8. SAMARIS March 2005 – State of creep test program 8 Preliminary measurements (bis)

9. SAMARIS March 2005 – State of creep test program 9 First creep test result for LAVOC Base layer  Excellent behaviour  Longer test required Surface layer  Lower behaviour  Breakdown of certain sample

10. SAMARIS March 2005 – State of creep test program 10 Next step Creep test on the DRI material at 50°C Further information on mixture Coefficient calculation  Binder data (viscosity of fresh binder) ? To be discussed  Test at another temperature? Other conditions?