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.
7-90 (b) Air-Entraining Ad mixtures . Air -entraining admixtures shall conform to the requirements of
AASHTO M 154 .
c.Retarding Admixtures . Retarding admixtures shall conform to the requirements of AASHTO M 194 and ASTM C494, Type B.
d.Latex Admixtures . Latex admixtures shall conform to the requirements of ASTM C1438, Type II. Latex admixture shall be stored in suitable enclosures which will protect it from dampness, freezing, and from prolonged exposure to temperatures higher than 86°F. If no shelf lif e is specified by the manufacturer, the admixture shall not be used after two years from the date of manufacture.
e.Water -Reducing Admixtures . Water -reducing admixtures shall conform to the requirements of AASHTO M 194 and ASTM C494, Type A.
f.Water -Reducing and Retarding Admixtures . Water -reducing and retarding admixtures shall conform to the requirements of AASHTO M 194 and ASTM C494, Type D.
g.Water -Reducing, High Range Admixtures . Water -reducing, high range admixtures shall conform to the requirem ents of AASHTO M 194 and ASTM C494 , Type F.
h.Water -Reducing, High Range, and Retarding Admixtures . Water -reducing, high range, and retarding admixtures shall conform to the requirements of AASHTO M 194 and ASTM C494 , Type G.
i.Accelerating Admixtures . Accelerating admixtures shall conform to the requirements of AASHTO M 194 and ASTM C494 , Type C.
j.Water -Reducing and Accelerating Admixtures . Water -reducing and accelerating admixtures shall conform to the requirements of AASHTO M 194 and ASTM C494, Type E.
k.Specific Performance Admixtures . Specific performance admixtures that provide desired performance characteristics, including but not limited to shrinkage reduction, alkali -silica reaction mitigation, and viscosity, shall conform to the requirements of AASHTO M 194 and ASTM C494, Type S.
l.Anti-Washout Admixtures . Anti -washout admixtures shall conform to the requirements of the U.S. Army Corps of Engineers CRD -C 661 .
7-91 725.03 MINERAL ADMIXTURES . Mineral admixtures shall be stored in a manner so as to protect them
from contamination with foreign materials.
a.Pozzolans . Pozzolans and fly ash shall conform to the requirements of AASHTO M 295, Class F. Fly ash shall contain 10% or less total calcium content, expressed as calcium oxide (CaO). Fly ash containing any oil shall be rejected. The mixing of the same type of fly ash from different sources will not be permitted.
b.Silica Fume . Silica fume shall conform to the requirements of AASHTO M 307 and be one of the products listed on the Agency’s Approved Products List . Silica fume shall be delivered in containers clearly labeled with the manufacturer’s name, mass (weight) of the silica fume, if densified or undensified, and if wet or dry.
c.Ground Granulated Blast -Furnace Slag (GGBFS) . GGBFS sha ll conform to the requirements of AASHTO M 302.
d.Ground Glass Pozzolans . Ground glass pozzolans shall conform to the requirements of ASTM C1866 . 725.04 COLORING ADMIXTURES . Coloring admixtures shall be pigments for integrally colored concrete in accord ance with ASTM C979 .
7-92 Sectio N 726 – Protectiv E Coating S and Waterproofin G Materials
726.0 1 TIMBE R PRESERVATIVE . Preservatives and pressure treatment processes for lumber and timber shall conform to the requirements of AASHTO M 133 or AWPA Standard U1 . Wood components shall be treated in accordance with AWPA Standard U1 to the requirements of the applicable use cat egory as specified in Table 726.01A . TABLE 726.01A – AWPA PRODUCT USE CATEGORIES AND COMMODITY SPECIFICATIONS Component AWPA Use Category AWPA Commodity Specification Sawn guardrail post UC4B A Sawn bollard, marker post, guide post, sign post, or fence post UC4A A Sawn structural lumber and timber UC4B A Sawn nonstructural lumber UC4A A Sawn timber cribbing UC4B A Structural glued laminated timber UC4B F Round fence post UC4A B Round timber pole UC4B D Any field treatment required by the Engineer shall be performed in accordance with the provisions of AWPA Standard M4 . Prior to the delivery of preservative material, a copy of the safety data sheet for the product shall be provided to the Engineer. 726.0 2 MINERA L SPIRITS . Mineral spirits shall conform to the requirements of ASTM D235 . 726.0 3 WATERPROOFIN G PITCH . Waterproofing pitch shall conform to the requirements of ASTM D450, Type II. 726.0 4 WOVE N COTTO N FABRIC . Bitumen -saturated woven cotton fabric shall conform to the requirements of ASTM D173 . 726.0 5 WOVE N GLAS S FABRIC . Coated woven glass fabric shall conform to the requirements of ASTM D1668 .
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 1241–1243 of 1,380.