Backfill Sand for Tank Foundation
Backfill Sand for Tank Foundation
(OP)
Hi!, we are doing tank foundation (for Demi water, fresh water, etc) using concrete ringwall ... and we are using backfill sand on top of soil backfill, im in need of specification for backfill sand, is there any specific code or standard for backfill sand? please help ... thanks!
d27
d27





RE: Backfill Sand for Tank Foundation
During construction, the movement of equipment and materials across the grade will mar the graded surface. These irregularities should be corrected before bottom plates are placed for welding. Adequate provisions, such as making size gradients in sublayers progressively smaller from bottom to top, should be made to pre vent the fine material from leaching down into the larger material, thus negating the effect of using the fine material as a final layer. This is particularly important for the top of a crushed rock ringwall.
Note: For more information on tank bottom corrosion and corrosion prevention that relates to the foundation of a tank, see API RP 651.
https://law.resource.org/pub/us/cfr/ibr/002/api.65...
RE: Backfill Sand for Tank Foundation
RE: Backfill Sand for Tank Foundation
RE: Backfill Sand for Tank Foundation
RE: Backfill Sand for Tank Foundation
If you have a water table issue where water will be present at or near the bottom of the ring wall, add a 6" layer of medium to coarse sand having a fineness modulus of 2.75 or greater to act as a capillary barrier.
RE: Backfill Sand for Tank Foundation