DYNTTS - Setting Up a Sample
The following steps should be followed, as a guide, to set up a sample in for use in the MINIDyn:
Prepare a relevant sized sample for your pedestal. This can be done by a number of ways i.e. by trimming back a slightly larger core sample, or by using a GDS Sample Preparation Kit.
Moulded sample placed on pedestal
Before placing the moulded sample onto the pedestal and saturated porous disk, ensure to de-air the pore pressure and pore flush ports, as well as to fully saturate the porous disk.
Using a suction sleeve (a component of a typical sample preparation kit), pull the membrane over both ends. Apply suction through the hose to pull the membrane tight against the sides of the sleeve. Put two relevant sized o-rings over one end of the suction sleeve and then place this end first over the sample (already situated on the pedestal).
Placing the suction sleeve, with membrane and o-rings, over the sample
Reduce suction on sleeve, roll each end of the membrane off the suction sleeve, as well as the two o-rings onto the pedestal as shown below.
Remove suction sleeve from around the sample and fold the
tail of the membrane up over the o-rings
Picture showing the position of the o-rings and the process of pulling the remaining tail of the membrane up over these o-rings
Attach the top cap to the back pressure line and push water through the tube to ensure that it is thoroughly de-aired
With a three-piece mould, or something similar, around the sample – pull the top overhang of the membrane over the lip of the former and place two relevant sized o-rings over the top of this mould also
Picture showing finished sample, on pedestal, with top cap in place
Place a fully saturated porous disk on-top of the sample and then the de-aired top cap on-top of this.
Pull the excess membrane over the top-cap, along with the two o-rings and then fold down the tail of the membrane over these o-rings also.
10. Remove the three piece mould and you should have a similarly prepared sample.