Concrete and paving glossary - L
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Laitance
A residue of weak and non-durable material consisting of cement, aggregate,
fines, or impurities brought to the surface of overwet concrete by the
bleeding water. See bleeding.
Lateral force
A force acting in a generally horizontal direction, such as wind, earthquake,
or soil pressure against a foundation wall.
Lift
A layer of concrete.
Lift-slab construction
A building method for multi-story sitecast concrete buildings that
casts all the slabs in a stack on the ground and then lifts them up
the columns and welds them into place. See sitecast
concrete.
Line
A rope or string made of nylon used as a guide to set forms to grade.
See grade.
Lock clamps
Accessory clamps used to connect transition forms to flexible forms
used in all flatwork and curb and gutter applications. See curb
and gutter forms, flatwork
forms, flexible
forms, and transition
forms.
Long float
A concrete finishing float designed to be handled by two men. See float.
Low-lift grouting
The common and simple method of unifying concrete masonry, in which
the wall sections are built to a height of not more than 4" before the
cells of the masonry units are filled with grout.
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