Patent ID: 7381177
Filing Date: 2008-06-03
Classification: B09B,Y02W

Abstract:
1. A method for filling an earthen void with a self-setting, self-hardening flowable fill material that does not contain Portland cement comprising the steps of: (a) providing a base of fresh water; (b) adding Class C fly ash to said fresh water base and mixing, said fly ash added in a respective volume ratio to said water in the range of 2:1 to 4:1 as measured in a dry, non-compacted form; (c) adding special waste to the water-fly ash mixture and mixing, said special waste added in a respective volume ratio to said water in the range of 2:1 to 4:1; (d) pouring or otherwise placing the mixture from step (c) into an earthen hole, earthen trench or other fillable void in the ground.