1710 – GEOSYNTHETICS
1700-18TABLE 1710-1: BASE COURSE REINFORCEMENT GE OSYNTHETIC MIMIMUM AVERGE ROLL VALUES
Property Test Method Requirements Tensile Strength (at 5% strain) ASTM D 4595 580 lb/ft MD 900 lb/ft CD Tensile Strength (at 2% strain) ASTM D 4595 280 lb/ft MD 450 lb/ft CD Coefficient of Soil Interaction GRI-GT6/GG5 0.8 Junction Strength (geogrid) GRI:GG2 25 lbs Permittivity (geotextile) ASTM D 4491 0.40 sec-1 Apparent Opening Size* (geotextile) ASTM D 4751 30 U.S. Sieve (0.0232 inches) Aperture Stability (geogrid) ** Minimum of 0.32 m-N/Deg (MD direction) * ASTM D 4751: AOS IS A MAXIMUM OPENING DIAMETER VALUE ** The Aperture Stability is based on resistance to in-plane rotational movement m easured by applying a 20 kg-cm (2 m-N) moment to the central junction of a 9 inch by 9 inch specimen restrained at its perimeter in accordance with U.S. Army Corps of Engineers Methodology for measurement of Torsional Rigidity.
The coefficient of interaction is ba sed on the soil being a granular, non-cohesive material with less than 10% fines. If these base soils are not available, perform a site specific design and increase the base course thickness, accordingly.
specified in the Contract Documents, for subgrade stabilization that complies with the properties in TABLE 1710-2 . This table is only applicable for subgrades with CBR values greater than 1. For subgrades with CBR values less than 1, a site specific design will be required.
TABLE 1710-2: SUBGRADE STABILIZATION GEOSYNTHETIC MIMIMUM AVERGE ROLL VALUES Property Test Method Requirements Tensile Strength (at 5% strain) ASTM D4595 810 lb/ft MD 1340 lb/ft CD Tensile Strength (at 2% strain) ASTM D4595 410 lb/ft MD 620 lb/ft CD Coefficient of Soil Interaction GRI-GT6/GG5 0.8 Junction Strength (geogrid) GRI:GG2 25 lbs Permittivity (geotextile) ASTM D4491 0.40 sec-1 Apparent Opening Sizea (geotextile) ASTM D4751 30 U.S. Sieve (0.0232 inches) aASTM D 4751: AOS is a Maximum Opening Diameter Value
rubberized asphalt adhesive that complies with the properties in TABLE 1710-3 .
TABLE 1710-3: PAVEMENT WATERPROOFING ME MBRANE MIMIMUM AVE RGE ROLL VALUES Property Test Method Requirements Permeance-Perms ASTM E 96 Method B 0.10 perms (max) Pliability (180° bend on a 1/4” mandrel @ -25°F) ASTM D 146 No cracking in fabric or rubber Puncture Resistance ASTM E 154 200 lbs Tensile Strength ASTM D 882 50 lbs/in
If required, provide a material for a prime coat (comprised of refined asphalt and a rapidly drying solvent) that complies with the requirements of DIVISION 1200.
Test geosynthetic materials according to the ASTM test methods cited in subsection 1710.2 .