This state-of-the-art report on lime stabilization is based on a comprehensive analysis of current practice and technical literature on soil-lime treatment. Many engineering properties of soils are optimized by lime treatment. Lime treated soils are used in pavement construction as subgrades, subbase materials, and base materials. Topics included in this report are soil-lime reactions, soil-lime mixture design and lime stabilization construction. A list of references is also included for more detailed information.

For many years, various forms of lime, including products with varying degrees of purity, have been utilized successfully as soil stablizing agents. The state of the art in lime treatment based on a comprehensive analysis of current practice and technical literature is presented in this report. References are included for more information.

Soil stabilization is the process whereby soils and related materials are made stronger and more durable by mixing with a stabilizing agent. These techniques are used for road construction in most parts of the world, although the circumstances and reasons for resorting to stabilization vary considerably.

Paper 1 reports on the fatigue behavior of a lime-fly ash-aggregate mixture. Specimens, 6- by 6- by 38-in., were tested after a 28-day curing period by subjecting them to constant, repeated flexural loads. Paper 2 considers the selection of 20 representative Iowa soils and the results of laboratory tests to determine the effects of a dolomitic monohydrate lime on the plastic limit and unconfined compressive strength of these soils. Paper 3: Subgrade soils on three projects in Virginia were stabilized with hydrated lime. They were sampled during 1960 for the purpose of studying the effects of addition of hydrated lime. Paper 4: The main objects of the investigations were to find a possible best ratio of lime to fly ash and the optimum amount of the lime and fly ash admixture for stabilizing various textured soils, to determine the effects of lime content and curing period on the strength of soil and lime mixtures, and to compare the strengths of soils treated with lime, lime and fly ash, or cement.