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A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS A04 IRON CASTINGS A05 METALLIC-COATED IRON AND STEEL PRODUCTS B01 ELECTRICAL CONDUCTORS B05 COPPER AND COPPER ALLOYS B07 LIGHT METALS AND ALLOYS C01 CEMENT C04 VITRIFIED CLAY PIPE C07 LIME AND LIMESTONE C09 CONCRETE AND CONCRETE AGGREGATES C11 GYPSUM AND RELATED BUILDING MATERIALS AND SYSTEMS C12 MORTARS AND GROUTS FOR UNIT MASONRY C13 CONCRETE PIPE C14 GLASS AND GLASS PRODUCTS C15 MANUFACTURED MASONRY UNITS C16 THERMAL INSULATION C17 FIBER-REINFORCED CEMENT PRODUCTS C18 DIMENSION STONE C21 CERAMIC WHITEWARES AND RELATED PRODUCTS C24 BUILDING SEALS AND SEALANTS C27 PRECAST CONCRETE PRODUCTS D01 PAINT AND RELATED COATINGS, MATERIALS, AND APPLICATIONS D04 ROAD AND PAVING MATERIALS D07 WOOD D08 ROOFING AND WATERPROOFING D09 ELECTRICAL AND ELECTRONIC INSULATING MATERIALS D11 RUBBER D14 ADHESIVES D18 SOIL AND ROCK D20 PLASTICS D35 GEOSYNTHETICS E05 FIRE STANDARDS E06 PERFORMANCE OF BUILDINGS E33 BUILDING AND ENVIRONMENTAL ACOUSTICS E36 ACCREDITATION & CERTIFICATION E57 3D IMAGING SYSTEMS E60 SUSTAINABILITY F01 ELECTRONICS F06 RESILIENT FLOOR COVERINGS F13 PEDESTRIAN/WALKWAY SAFETY AND FOOTWEAR F16 FASTENERS F17 PLASTIC PIPING SYSTEMS F33 DETENTION AND CORRECTIONAL FACILITIES F36 TECHNOLOGY AND UNDERGROUND UTILITIES G03 WEATHERING AND DURABILITY A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS C01 CEMENT C09 CONCRETE AND CONCRETE AGGREGATES D02 PETROLEUM PRODUCTS, LIQUID FUELS, AND LUBRICANTS D03 GASEOUS FUELS D04 ROAD AND PAVING MATERIALS D15 ENGINE COOLANTS AND RELATED FLUIDS D18 SOIL AND ROCK D24 CARBON BLACK D35 GEOSYNTHETICS E12 COLOR AND APPEARANCE E17 VEHICLE - PAVEMENT SYSTEMS E21 SPACE SIMULATION AND APPLICATIONS OF SPACE TECHNOLOGY E36 ACCREDITATION & CERTIFICATION E57 3D IMAGING SYSTEMS F03 GASKETS F07 AEROSPACE AND AIRCRAFT F09 TIRES F16 FASTENERS F25 SHIPS AND MARINE TECHNOLOGY F37 LIGHT SPORT AIRCRAFT F38 UNMANNED AIRCRAFT SYSTEMS F39 AIRCRAFT SYSTEMS F41 UNMANNED MARITIME VEHICLE SYSTEMS (UMVS) F44 GENERAL AVIATION AIRCRAFT F45 DRIVERLESS AUTOMATIC GUIDED INDUSTRIAL VEHICLES
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Modular Block Retaining Wall Units

While machine-placed wet-cast precast concrete retaining wall units have been commercially available since the late 1990s, there has not been an ASTM standard available to cover these products. Now, ASTM International Committee C27 on Precast Concrete Products is working on such a standard. WK38192, Specification for Wet-Cast Precast Modular Block Retaining Wall Units, is being developed by Subcommittee C27.20 on Architectural and Structural Products.

“Like any product standard, the purpose of WK38192 is to identify the physical properties of the products that are important for their intended use and to describe the proper means and methods of testing and measurement of those properties,” says Clint Hines, president, JC Hines and Associates LLC, and a C27 member. “This standard will set requirements for dimensional tolerances of individual block units and lifting device requirements for improved safety in handling and installation.”

In addition, Hines notes that WK38192, once it has been approved, will eliminate the use of reconstituted ready-mixed concrete in the production of block units, establish guidelines for freeze-thaw durability concerns and standardize minimum requirements for production quality assurance/quality control testing and reporting.

The units to be covered by WK38192 are used in the construction of gravity retaining wall and mechanically stabilized earth retaining wall applications. They can be used for a broad range of retaining wall applications from residential homes to large scale commercial site development projects, as well as public agency transportation and waterways. The proposed standard will be used by manufacturers and distributors of the block units, testing laboratories, consulting firms, government agencies and commercial construction companies.

All interested parties are invited to join in the standards developing activities of Committee C27.

CONTACT Technical Information: Clint Hines, JC Hines and Associates LLC • Anderson, Ohio • Phone: 513-843-6570 | ASTM Staff: Joseph Hugo • Phone: 610-832-9740 | Upcoming Meeting: Dec. 10 • December Committee Week • Jacksonville, Fla.

This article appears in the issue of Standardization News.