ASTM D7762-18e1 PDF Download

The ASTM D7762-18e1 standard provides guidelines for the use of self-cementing coal fly ash in stabilizing soils and soil-like materials for various applications, including roadway construction, treatment of expansive subgrade or organic subgrade, and limiting settlement of fills below buildings.

The standard highlights that self-cementing fly ash can improve the properties of stabilized materials, such as increased stiffness, strength, and freeze-thaw durability, as well as reduced hydraulic conductivity, plasticity, and swelling. It emphasizes that the success of stabilization with fly ash depends on factors such as the combination of soil, fly ash, and other additives, as well as the construction procedure used. The responsibility for selecting appropriate materials, conducting applicable tests, establishing acceptance criteria, and specifying the design lies with the design engineer.

The standard also includes test methods for evaluating the mechanical properties of fly ash stabilized materials, which assist in the characterization of their performance. It mentions that the use of self-cementing fly ash in geotechnical engineering applications may be subject to regulation by state and local codes, which should be consulted.

Additionally, the standard references other related ASTM standards, such as Specification D5239 for characterizing fly ash, Specification C593 for evaluating the performance of fly ash and other pozzolans requiring lime soil stabilization, and Guide E2277 for characterizing properties of fly ash and bottom ash in structural fills.

It is important to note that this standard provides instructions for specific operations and should be used in conjunction with professional judgment and the consideration of a project's unique aspects. The title "Standard" in this document means it has been approved through the ASTM consensus process but should not replace the standard of care in professional services.