<p><p><h2>Commentary</h2>To date the use of geocell confinement has been limited to a few trial projects. Suggested pay items and units of measurement include the following:<br><ul> <li>Geosynthetic fabric measured by the square yard in-place</li> <li>Geocell measured by the square yard in-place</li> <li>Infill material measured by the cubic yard</li></ul>The equipment used to construct geocell confinement in pavement systems is common to highway construction projects; therefore, additional mobilization costs are negligible.<br><h2>Cost Information Summary</h2>The following table lists construction cost items associated with geocell confinement in pavement systems along with approximate cost ranges. Readers should carefully examine the project characteristics and constraints and determine to what degree if any these factors may influence the actual cost associated with constructing geocell confinement in pavement systems.</p><p><table class='tablepress' id='tablepress-84'><thead><th>Pay Item Description</th><th>Quantity</th><th>Unit</th><th>Low Unit Price</th><th>High Unit Price</th><th>Factors Which May Potentially Impact Costs</th></thead><tbody><tr><td >Geocell
</td><td >Greater Than 5,000</td><td >SY</td><td >$5.00</td><td >$8.00</td><td >Approximate costs reported by Henry et al (2005); "Improved Performance of Unpaved Roads During Spring Thaw." USACE ERDC/CRREL TR-05-1, Engineer Research and Development Center, Cold Region Research and Engineering Laboratory, Hanover, NH

Unit costs will increase as cell height increases
</td></tr><tr><td >Geosynthetic Separation Fabric</td><td >Greater Than 5,000
</td><td >SY</td><td >$1.00</td><td >$2.50</td><td >Woven fabrics are more expensive than nonwoven fabrics

Heavier fabrics cost more

Specified lap widths impact the total quantity of material required

Production rates do not significantly affect unit costs
</td></tr><tr><td >Infill Material</td><td >Greater Than 500

</td><td >TON</td><td >$-</td><td >$-</td><td >Sand, gravel, aggregate and recycled asphalt pavement have been used as infill materials

Use historical costs that are representative of the project quantity, project conditions and project location
</td></tr></tbody></table><h2>Historical Cost Information</h2>Research efforts did not yield any geocell bid tabulation data from state highway agencies.<br><h2>Conceptual Cost Estimating Tool</h2>The conceptual cost estimating tool is intended to be used to develop a preliminary project scoping cost estimate. This preliminary estimate can be based on the typical construction cost item values as contained in the Cost Information product or from user specified cost values when such are known. Users should read and understand the information in Cost Information product prior to using the cost estimating tool. You can download the Cost Estimating Tool to open a cost estimating spreadsheet for producing a preliminary project scoping estimate.</p><p><a class="arrow-link" href="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/… the Cost Estimating Tool</a></p></p>