7-87 SECTIO N 720 – GEOTEXTILES 720.0 1 GENERA L REQUIREMENTS . Geotextiles shall be evaluated in accordance with the AASHTO Product Evaluation & Audit Solutions work plan for Geotextile Product Evaluation and Facility Audits and in compliance with the AASHTO Product Evaluation & Audit Solutions audit program for geotexti les. Geotextiles shall be one of the products listed on the Agency’s Approved Products List for the respective material specification. 720.0 2 GEOTEXTIL E FOR ROADBE D SEPARATOR . Geotextile for roadbed separator shall conform to AASHTO M 288 , Table 1 , Class 1 for Geotextile Strength Property Requirements, and shall conform to AASHTO M 288 , Table 3 for Separation Geotextile Property Requirements , except as modified below.
a.Permittivity . Permittivity shall be a minimum of 0.2 sec-1 as determined in accordance with ASTM D4491 .
720.03 GEOTEXTIL E UNDE R RAILROA D BALLAST . Minimum average roll values (MARV) for
geotextile under railroad ballast shall be as required in Table 720.03A . TABLE 720.03A – MARV FOR GEOTEXTILE UNDER RAILROAD BALL AST Property Test Method MARV Elongation criteria at failure 1 ASTM D4632 50% min. Grab strength (lbs) ASTM D4632 225 Tear strength (lbs) ASTM D4533 115 Puncture strength (lbs) ASTM D6241 850 Permittivity (s-1) ASTM D4491 0.70 Apparent opening size (mm) ASTM D4751 0.212 max. (No. 70 Sieve) UV resistance (% strength retained) ASTM D4355 70% at 500 hours of exposure Structure N/A Nonwoven only 1 Elongation corresponds to maximum grab tensile strength as measured in accordance with ASTM D4632 . 720.0 4 GEOTEXTIL E UNDE R STON E FILL. Geotextile under stone fill shall conform to AASHTO M 288, Table 1 , Class 1 for Geotextile Strength Property Requirements, and shall conform to AASHTO M 288, Table 5 for Stabilization Geotextile Property Requirements. Geotextile structure shall not be slit film. 7-88 720.0 5 GEOTEXTIL E FOR UNDERDRAI N TRENC H LINING . Geotextile for underdrain trench lining shall conform to AASHTO M 288 , Table 1 , Class 3 for Geotextile Strength Property Requirements, with a minimum elongation of 20%. Geotextile for underdrain trench lining shall conform to AASHTO M 288, Table 2 (> 50% of in situ soil passing the No. 200 (0.075 mm) sieve) for Subsurface Drainage Geotextile Requirements. Geotextile structure shall be nonwoven and shall not be slit film.
720.06 GEOTEXTIL E FOR FILTE R CURTAIN . Minimum average roll values (MARV) for geotextile
for filter curtain shall be as required in Table 720.06A . TABLE 720.06A – MARV FOR GEOTEXTILE FOR FILTER CURTAIN Property Test Method MARV Elongation criteria at failur e 1 ASTM D4632 20% max. Grab strength (lbs) ASTM D4632 200 Tear strength (lbs) ASTM D4533 50 Puncture strength (lbs) ASTM D6241 430 Permittivity (s-1) ASTM D4491 0.28 Apparent opening size (mm) ASTM D4751 0.212 max. (No. 70 Sieve) UV resistance (% strength retained) ASTM D4355 70% at 500 hours of exposure Structure N/A Woven only 1 Elongation corresponds to maximum grab tensile strength as measured in accordance with ASTM D 4632 .
720.07 GEOTEXTIL E FOR SILT FENCE . Geotextile for silt fence shall conform to AASHTO M 288 ,
Table 8 for Temporary Silt Fence Property Requirements. Geotextile structure shall be woven. 7-89 SECTIO N 725 – CONCRET E CURIN G MATERIAL S AND ADMIXTURES 725.0 1 CONCRET E CURIN G MATERIALS . Concrete curing materials shall meet the following requirements:
a.White Burlap -Polyethylene Sheet . White burlap -polyethylene sheet shall conform to the requirements of ASTM C171 .
b.Burlap Cloth . Burlap cloth shall conform to the requirements of AASHTO M 182 . Worn burlap cloth with holes, or burlap cloth reclaimed from uses other than that of curing concrete, will not be permitted. The burlap cloth shall be free of any ingredients that may damage or be detrimental to concrete.
c.White Polyethylene Sheeting . White polyethylene sheeting (film) shall conform to the requirements of ASTM C171 .
d.Liquid Membrane -Forming Compounds . Liquid membrane -forming compounds shall be one of the products listed on the Agency’s Approved Products List and shall meet the following requirements:
1.Liquid membrane -forming compounds shall be evaluated in accordance with the AASHTO Product Evaluation & Audit Solutions work plan for Evaluation of Concrete Curing Compounds .
2.Liquid membrane -forming compounds shall conform to the requirements of ASTM C309 , Type 1 -D or Type 2, Class B.
3.Liquid membrane -forming compounds shall not be allowed to freeze. 725.0 2 CHEMICA L ADMIXTURES .
a.General Requirements . Non -bulk quantities of chemical admixtures shall be delivered in the manufacturer’s original containers marked with the manufacturer’s name and product name. Bulk quantities shall be accompanied by a delivery slip indicating both the manufacturer’s name and the product name. Chemical admixtures , excluding anti -washout admixtures, shall be one of the products listed on the Agency’s Approved Products List for the respective material specification, and shall be evaluated in accordance with the AASHTO Product Evaluation & Audit Solutions work plan for Evaluation of Concrete Admixtures . Chemical admixtures shall meet the requirements of the respective material specification below.
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 1239–1240 of 1,380.