Ctr_4656_-_Informational_Handout_-_Tensar.pdf

10755 Scripps Poway Parkway | Suite 236 | San Diego, California 92131

Garrett Fountain, PE, GE West Area Engineer

Ph: 858.287.3068 Garrett.fountain@CMC.com

December 12, 2024

To: Mr. Gabriel Flores

Associate Civil Engineer, Engineering and Design Division County of Sacramento, Department of Transportation 4111 Branch Center Road Sacramento, California 95827

Project Name: Meister Way From Bear Paw Drive To Lone Tree Road Sacramento County, California

Subject: Tensar InterAx Geogrid Submittal Stabilized Section Alternatives

Dear Mr. Flores, In accordance with your request, the undersigned prepared this letter to present pavement section concepts using a mechanically stabilized layer(MSL). The purpose of the MSL is to improve the performance of the aggregate base supporting the wearing surface of the pavement section.

Tensar’s MSL is calibrated with local research. Table 1 presents Tensar’s conceptual pavement section for the specified TI and subgrade R-Value using Tensar InterAx Geogrid to create an

MSL.

To prepare alternative sections Tensar representatives reviewed:

• “Meister Way Improvement Project Bear Paw Drive To Lone Tree Road “C” Plans”, Preliminary Plans, Prepared by Sacramento County.

Table 1 Pavement Structural Sections

R-Value = 5 Traffic Index

Proposed Pavement Structural Section

Units Tensar Section

RHMA-G Inches 2.0 HMA-LG Inches 6.0 Class 2 AB Inches 14.0 Tensar NX850 Geogrid

N/A -

Subgrade N/A Prepared per County standard Total Depth 22.0 Inches

10755 Scripps Poway Parkway | Suite 236 | California, 92131 | tensarcorp.com

Tensar Enhanced Pavement Foundation Description

By applying Tensar Technology, the load spreading capability of a InterAx® mechanically stabilized layer improves the support and deformation characteristics compared non-stabilized aggregates. The geogrid achieves this through confinement that reduces the potential for the aggregate base to move vertically and laterally. The reduction in movement results in a composite mechanically stabilized layer (MSL) that provides increased shear strength. Additionally, the system can experience greater stress with less strain. Large scale Tri-axial testing has shown:

1) InterAx stabilized aggregates show higher shear strength than non-stabilized aggregates.

Figure 1 illustrates the increase in the shear strength of the InterAx stabilized system. The InterAx geogrid restrains soil particles against lateral movement and rotation in and around the InterAx apertures. This results in increased shear strength of the composite system.

Figure 1. Added shear strength from InterAx stabilization measured in a large triaxial compression test

Limitations

If project conditions or final design vary from those described in this letter, Tensar should be contacted regarding the applicability of, and the necessity for, any revisions to the conclusions and concepts presented in this letter. This letter is based on the project as described and the information provided to Tensar by Sacramento County.

This report has been prepared for the use of the specific application of the described project. It may not contain sufficient information for other users or other purposes.

Actual site and ground conditions may materially vary from those used for illustration in this document, including with respect to (i) the project site and its surroundings, (ii) ground conditions including subgrade, foundation and surface soil conditions, (iii) topographical, environmental and seasonal factors, (iv) water conditions above and below ground, (v) factors affecting the backfill requirements, and (vi) factors affecting loading, performance and other project requirements and expectations. These and other considerations should be evaluated and confirmed by a qualified and experienced geotechnical engineer engaged by the site owner or other designated party. The construction methods, materials and solutions at the project site, and their suitability, Non-stabilized

InterAx stabilized

Greater ductility Additional shear strength from InterAx stabilization

10755 Scripps Poway Parkway | Suite 236 | California, 92131 | tensarcorp.com manner of use and performance, are the responsibility of the site owner and/or those contracted to provide same. Tensar can provide its products and systems, and related formal engineering calculations and a design, if engaged to do so pursuant to the terms and conditions of a written and duly signed contract covering such items. However, this Application Suggestion does not constitute a contract, or create any warranty, responsibility or duty on Tensar’s part, with respect to or in favor of the recipient or any other party.

Thank you for the opportunity to be of service to you on this project.

Respectfully submitted, Garrett Fountain Garrett Fountain, PE, GE West Area Engineer Tensar International Corporation

GeneWeddle Gene Weddle Northern California Manager Tensar International Corporation