Porous fill | Article about porous fill by The Free Dictionary
1.Lightweight concrete which is placed on roofs or floors to promote drainage.
2. A base course of granular material placed between a sub-grade and floor slab to retard the capillary rise of moisture.
References in periodicals archive
5M64 Surface Course ; 500 TON Hot Mix Asphalt 25M64 Base Course ; 400 CY Porous Fill
; 950 LF 9 x18 Concrete Vertical Curb.