1728 - EXPANDED FOAM FOUNDATION MATERIAL FOR SIGN POSTS 1700-42
1728.1 Description
This specification covers expanded foam backfill used for setting sign posts. The rigid polyurethane foam is shipped in two parts and mixed on site. Soon after mixing the two components, the product expands in volume and conforms to the shape of the excavation. Reaction and cure times vary with component temperature.
1728.2 Requirements
a. Store, handle, and mix according to the manufacturer’s instructions. b. Provide material complying with TABLE 1728-1: TABLE 1728-1: PROPERTIES OF CURED PRODUCT Property Test Method Requirement Shear Strength, min. ASTM D 732 70 psi Compressive Strength, min. ASMT D 1621 165 psi Density1, min. ASTM D 1622 8.5 pcf Tensile Strength1, min. ASTM D 1623, Type A 150 psi 1minimum of five test specimens
1728.3 Test Methods
Test as specified in subsection 1728.2b.
1728.4 Prequalification
a. Manufacturers interested in prequalifying material must submit the following to the Bureau of Construction and Materials:
1.A complete description, literature, and set of instructions and recommendations,
2.A copy of test results performed as outlined in subsection 1728.2b,
3.Certificate stating results comply with the values outlined in subsection 1728.2b and are from tests of material that has essentially the same chemistry and mechanical properties as that submitted for FHWA acceptance,
4.A copy of the Federal Highway Administrati on (FHWA) letter accepting the product as foundation material for use with certain sign post systems,
5.Material Safety Data Sheets (MSDS). b. The Bureau of Construction and Materials will main tain a list of qualified materials. Products will remain on the list as long as field performance is satisfactory.
1728.5 Basis of Acceptance
Prequalification as specified in subsection 1728.4. Receipt and approval of a Type C certification as specified in DIVISION 2600. Receipt and approval of a certifica tion from the manufacturer stating the furnished material has essentially the same chemistry and mechanical properties as that submitted for FHWA acceptance, and complies with the crashworthiness requirements of FHWA and National Cooperative Highway Research Program (NCHRP) Report 350. Visual inspection by the Field Engineer.
Get an email when 1728 changes
Kansas revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 832–832 of 978. View official source ↗