* Has natural or conditioned moisture content to allow proper compaction * Contains no deleterious substances (wood, metal, plastic, waste, etc.), hazardous chemicals or pesticide/ herbicide residue Because the EBS system is flexible, curves can be incorporated along the wall or slope alignment. This is achieved for each successive lift by flexing and staking the units prior to backfilling. Soil compaction control during construction is critical to the long-term performance of these gravity structures. Cell infill should be compacted with a moderate effort, allowing some packing of the soil without causing excessive swelling of the cell walls. Compaction is required in the backfill zone behind the FIGURE 7 Lateral earth pressure and surcharge forces acting on a modular block wall (adapted from NCMA 1996) Welding and testing equipment for the serious geosynthetics installer Pro-Wedge VM-20 Wedge Welder Over 6,000 units sold! Pro-Tester High-Pull Pensiometer for testing high-strength materials with new Auto-Engage feature (888) 324-WELD (9353) or 530 621-3200 Visit demtech.com or call for more product information. www.GeosyntheticsMagazine.com 37http://www.demtech.com http://www.GeosyntheticsMagazine.com