01661920

Component

The focus of this research was development of alternative backfill materials to be used in the base and subbase for rapid pavement damage repairs using a variety of commercially-available products. The performance of a variety of additives, including 15 traditional and non-traditional materials, and a control was evaluated. The types of additives included cement, inorganic chemicals, polymer, polyurethane, and silicates. This paper presents the technical evaluation of the laboratory tests of alternative backfill materials used under airport pavements. The additive performance criteria focused on bearing capacity and unconfined compressive strength at 2 hours. Laboratory testing included mixing silty, clayey sand soil with each of the additives at specified application rates; compacting; curing; and conducting unconfined compressive strength and California Bearing Ratio (CBR) testing. Almost all of the additives in the study improved the strength and CBR of the uncompacted soil even at only 2 hours of curing. Most of the stabilizers showed improved performance as water contents increased, indicating the importance of moisture as an aid in curing. Additional research into longer curing times would provide better information on use of these materials for long term stabilization of soils.

This paper was sponsored by TRB committee AFS80 Standing Committee on Stabilization of Geomaterials and Recycled Materials.

18-05427

English

8p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Additives; Airport runways; Base course (Pavements); Bearing capacity; Laboratory tests; Repairing; Soil stabilization; Subbase (Pavements)

Backfill materials; Pavement damage; Rapid repair; Silty clayey sand; Unconfined compressive strength

Aviation; Maintenance and Preservation; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-05427

TRIS, TRB, ATRI

Jan 8 2018 11:22AM