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Kingston,Mi | In Michigan at least, you would not be able to claim that an expansion joint topped off with any caulk was essentially water tight. I was directed/recruited to design (along with other engineers and civil engineering technicians) the first test units for secondary agrichemical containment in the early 1990's while Michigan's legislature debated proposed laws mandating secondary containment on farms similar to the rules in place for commercial storage. The rules for on farm secondary containment are somewhat relaxed from those for commercial units but neither would allow that as the only attempt at sealing up a floor and containment wall.
Is the containment already built and you are retro fitting or are you designing the containment? An existing structure that is being converted to secondary containment and is not water tight would be very easy to water proof with a high density polyethelene line at least 30 mil thick, securing the edges to a wall with treated lumber (a 2x6 with a bevel cut edge on the bottom and a 2x4 on top secured with corrosion resistant bolts and anchors)
New concrete construction should never have any joints in the floor no matter how large, just increase the steel to concrete ratio when any distance exceeds 50 ft. Half inch re-rod at 18 inch spacing on concrete bricks, correct lap lengths, L shaped bars to form the walls secured against rotation, pour the floor one day, form the walls after tying additional steel and pour the wall on the third day. Concrete will "marry " between the two pours and be essentially watertight.
This advice comes from design of new and retro fitted secondary containments. At least one poster on this forum reused an existing 4 ft. deep liquid hog manure tank that had been under a nursery, we partially filled it with compacted sand then installed the liner, placed the tanks and closed the new garage door in the side of the building. Old hog building repurposed as fertilizer and chemical storage. | |
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28% uan storage
