Introduction
Norlite
inert aggregate, with a minimum angle of internal friction (O) of 40· and
a maximum wet density of 65 PCF (ASTM D 2049) aids Geotechnical engineers
in reclaiming land which would otherwise go unused.
Norlite is continually
being specified for backfill behind retaining walls and bulkheads, pipe
covering, footings and subbase for roads and parking lots.
Norlite lightweight
structural fill has been successfully placed on many construction sites
throughout the Northeastern United States.
Advantages of Norlite Lightweight Aggregate in Geotechnical Applications
Design Advantages
- provides cost effective solutions
- reduces loads
- controls settlements
- increases stability
- provides free drainage
- possesses high angle of internal friction
- provides thermal insulation
Placement Advantages
- requires no special job site equipment
- allows all-weather placement
- eliminates waiting between placing lifts
Other Applications
- slope stabilization
- subgrade improvements
- gas ventilation for landfills
Method of Construction
Lightweight fill can be placed in approximately uniform layers not to
exceed 12 inches loose thickness. Each layer shall be compacted using
vibratory compaction equipment weighing not more than 12 tons static
weight. The actual lift thickness, exact number of passes, and need for
vibrating the roller will be determined by the engineer, depending on
the project requirements (i.e., strength, compressibility, density) and
equipment used. The contractor shall take all necessary precautions during
construction activities in operations on or adjacent to the lightweight
fill to ensure that the material is not over-compacted. Construction
equipment, other than for compaction, shall not operate on the exposed
lightweight fill.
