ASTM D6817/D6817M-17 (R2021) pdf free download.Standard Specification for Rigid Cellular Polystyrene Geofoam.
1.1 This specification covers the types, physical properties, and dimensions of rigid cellular polystyrene intended for use as geofoam.
1.2 This specifIcation does not cover the layout. placement, and workmanship for proper installation and performance of rigid cellular polystyrene geofoam.
1 .3 Rigid cellular polystyrene geofoam covered by this specification may need protection from certain chemicals, environmental exposure. and concentrated loads. Additional design considerations may include thermal conductivity and buoyancy. Guidelines regarding these end-use considerations are included in Appendix XI.
1 .4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall he used independently of the other, and values from the two systems shall not be combined.
4. Ordering Information
4.1 Acquisition documents shall specify the following:
4.1.1 Title, number, and year of this specification.
4.1.2 Typeasper Table 1.
4.1.3 Total product volume required of each type.
5. Materials and Manufacture
5.1 RCPS geofoam shall be formed by the expansion of polystyrene resin beads or granules in a molding process (EPS) or by the expansion of polystyrene base resin in an extrusion process (XPS). RCPS geofoam may he manufactured with reprocessed polystyrene foam (regrind).
5.2 RCPS geofoam shall be of uniform density and have essentially closed cells. RCPS geofoam is an organic material and is considered combustible. It should not he exposed to flames or other ignition sources.
6. Qualification Requirements
6.1 The physical properties listed in Table 1 constitute the minimum product quail fication requirements for commonly manufactured types of RCPS geofoam. The compressive resistance at 1 % strain is typically within the elastic limit of the geofoarn product types in Table 1 and is accepted as the compressive resistance to limit long-term deformation under structural load.
6.2 RCPS Geofoam Types—It is the user’s responsibility to specify the required type as in Table 1 and to obtain supporting documentation regarding physical properties from the material supplier.
6.3 Combustibility Requirements—All RCPS geofoarn shall contain sufficient flame retardants to meet a minimum oxygen index as required in Table 1.
6.4 Curing—Unless otherwise specified in the contract, RCPS geofoam shall be cured for a minimum of 24 h before delivery and inspection.ASTM D6817/D6817M pdf download.