FP-96 English Version - Eastern Federal Lands Highway Division

Section 713Table 713-7Synthetic Polypropylene Erosion Control MatProperty Specification Test MethodColorThicknessTensile strength (1)Elongation (1)Porosity (2)Resiliency (3)Ultraviolet stability (4)Black0.50 inches min.94 x 54 lb/ft 50% max.90% max.80% min.80% min.VisualASTM D 1777ASTM D 5035ASTM D 5035CalculatedASTM D 1777ASTM D 4355(1) Values for both machine and cross-machine directions under dry or saturatedconditions using 2-inch strip method.(2) Calculation based upon mass, thickness, and specific gravity.(3) The percent of original thickness retained after 3 cycles of a 100 pounds persquare inch load for 60 seconds followed by 60 seconds without load. Thicknessmeasured 30 minutes after load removed.(4) Tensile strength retained after 1000 hours in a Xenon ARC weatherometer.(b) Roving.(1) Fiber glass roving. Form fiber glass roving from continuous fibersdrawn from molten glass, coated with a chrome-complex sizing compound,collected into strands and lightly bound together into roving withoutthe use of clay, starch, or like deleterious substances. Wind the rovinginto a cylindrical package approximately 12 inches high so the rovingcan be continuously fed from the center of the package through an ejectordriven by compressed air and expanded into a mat of glass fibers on thesoil surface. Do not use roving containing petroleum solvents or otheragents known to be toxic to plant or animal life. Conform to thefollowing:(a) Strands/rove, end count 56 to 64(b) Fibers/strand, end count 184 to 234(c) Fiber diameter (trade designation G), 0.00035 to 0.00053 in.ASTM D 578(d) Yd/lb of rove, ASTM D 578 170 to 300(e) Yd/lb of strand, ASTM D 578 13,000 to 14,000(f) Organic content, ASTM D 578 1.65% max.725