We are planning to backfill behind abutment and wing walls of a new proposed bridge with at least 320 psi (preferably 600psi) foamed CLSM (unit weight of 65 pcf). After it is set, what kind of active pressure it can exert to the walls in dry state. We have considered 4 Ft lift height during construction and have already considered horizontal pressure from the fluid CLSM. Your help will be greatly appreciated. Thanks.
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