lean mix

lean mix, lean mixture

1. A concrete or mortar mixture with relatively low cement content.
2. A plaster which is not workable.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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A lean mix may be healthier for you but it can turn out to be very dry and not as tasty.
Two Gomaco Slipform Pavers are being used to lay the majority of the lean mix and pavement concrete on the main runway, north and south taxiways and several hardstandings.
"Now," Gnaedinger says, "we have real data that shows concrete, even very lean mixes, curing out at this very cold temperature."