Page 521830 RIPRAP
830.1 Riprap
A.Riprap: Stone for riprap will be hard and durable and will have a minimum weight of 155 pounds per cubic foot. Riprap may be ledge rock or field stone If field stone is utilized for Class B or larger, the stone will have a minimum of 2 crushed faces as defined under SD 211. Stone will be free from overburden, spoil, shale, and organic material. The riprap stone will meet the following gradation requirements: ClassRock Size*1 in feet Rock Size in poundsPercent of Riprap Smaller Than A1.30 0.95 0.40200 B1.80 1.30 0.40500 C2.25 1.80 0.951000 75100 D2.85 2.25 1.802000 500100 E3.60 2.85 2.254000 1000100 F4.50 3.60 2.858000 2000100 *1Based on a specific gravity of 2.65 and spherical shape. The riprap class is the median particle weight with 50% of the material smaller and 50% of the material larger. Each load of riprap will be well graded from the smallest to the maximum size specified. B.Testing: Specific Gravity .......................................................................................... SD 210 Page 522831 GEOTEXTILES AND IMPERMEABLE PLASTIC MEMBRANE
831.1 Requirements
Geotextiles and impermeable plastic membrane will meet the following requirements as applicable for the specified use. The Contractor will provide a Certificate of Compliance verifying that the material meets the following specifications or documentation the material is listed on the approved products list. Note: If the type of fabric to be used is not specified, drainage fabric - Type B will be used. All values listed are Minimum Average Roll Values (MARV) unless otherwise specified. Drainage Fabric Separator Fabric Fabric and Membrane PropertyTest MethodType A Type BWovenNon- WovenReinforcement Fabric (MSE) Impermeable Plastic Membrane AASHTO ClassAASHTO M 2883 Non- woven1 Non- woven3 Woven2 Non- woven1 Woven PERFORMANCE CRITERIA DURING SERVICE LIFE AOS, US Standard SieveASTM D475140-100 40-100 40-100 40-100 40-100 - - - Permittivity, Sec-1ASTM D44910.2 Min 0.3 Min 0.05 Min 0.1 Min 0.005 Min0.10 US Perms ASTM E96 Thickness, MilsASTM D5199- - - - - - - - - - - - - - - 12 STRENGTH REQUIREMENTS Grab Strength*3, Ibs ASTM D4632110 200 180 160 315 100 *1 Grab Elongation*3, % ASTM D463240 Min 50 Min 50 Max 50 Min 35 Max 15 Min *1 Trapezoid Tear Strength, lbsASTM D453340 80 70 55 110 - - - Puncture Strength, lbsASTM D6241220 430 370 310 620 280 UV Strength Retention, %ASTM D4355 *2 50 50 50 50 50 50 Wide Width Strip Tensile Strength*3, lbs/inchASTM D4595 - - - - - - - - - - - - 200 - - - TYPICAL USES *a*b*c*c*d*e *1Test results from ASTM D7004 will be acceptable for impermeable plastic membrane. *2Non-stabilized or low susceptible geotextiles should not be exposed to ultraviolet radiation for more than 5 days. *3Grab strength, grab elongation, and wide width strip tensile strength are measured in machine and cross-machine directions. *aJoints for concrete pipe culverts & RC boxes, edge drains, drainage tubing, etc. Used as a general filtration fabric. *bRiprap, gabions, inslopes retention on MSE backfill, etc. Use-same as *a, except has a higher construction loading. *cSubgrades, embankments, etc. Used to separate granular material from subgrade. *dBridge end backfill and reinforced slopes. Used to create a reinforced fill and/or used as the wall facing material. *eUnder pavements. Used to restrict the flow of fluids to underlying materials .
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