ASTM D6817-17(R2021) pdf free download

ASTM D6817-17(R2021) pdf free download.Standard Specification for Rigid Cellular Polystyrene Geofoam
1. Scope
1.1 This specification covers the types, physical properties, and dimensions ofrigid 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 X1. 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 be used independently of the other, and values from the two systems shall not be combined. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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 be 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 be exposed to flames or other ignition sources.
6. Qualification Requirements
6.1 The physical properties listed in Table 1 constitute the minimum product qualification requirements for commonly manufactured types of RCPS geofoam. The compressive resis- tance at 1 % strain is typically within the elastic limit of the geofoam 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 geofoam 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.
7. Availability and Dimensional Tolerance
7.1 Availability—The RCPS geofoam materials covered by this specification are commonly available in the size range shown in Table 2. Specific RCPS geofoam block dimensions vary by manufacturer equipment characteristics. 7.2 Dimensional Tolerance—Unless otherwise specified, the acceptable length, width, thickness, flatness, and squareness tolerance criteria on RCPS geofoam shall not exceed 60.5 %.
8. Damage and Degradation
8.1 Damage—RCPS geofoam as delivered to the project site shall have no defects that will adversely affect its service and workability qualities. Material units that manifest unacceptable surface or volumetric damage shall be replaced. 8.1.1 Surface Damage—Damage to load-bearing RCPS geofoam surfaces shall be limited to less than 20 % of the equivalent load-bearing area of the unit. 8.1.2 Volume Damage—Volumetric damage of RCPS geo- foam shall be limited to less than 1 % ofthe volume ofa single unit. 8.1.3 UV (Ultraviolet) Degradation—Discoloration and dusting of RCPS geofoam caused by the extensive exposure to sunlight is a defect that will adversely affect its service and is grounds for rejection. Refer to X1.6.