Evaluation of Chemically Stabilized Secondary Roads, May 1974

(1974) Evaluation of Chemically Stabilized Secondary Roads, May 1974. Iowa State University

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Abstract

For many years engineers have been studying new ways of constructing all-weather road surfaces that are low cost, durable,, and easy to build. The research project reported herein is concerned with field and laboratory analysis of some of the more common, and also some not so common, additives for the stabilization of roads. These additives, when applied to a roadway, will hopefully provide a lower cost alternate to more expensive, high-type pavements utilized in secondary road systems. Three methods of construction were used on this project: (1) Dust palliation through surface application of additives, (2) an intermediate measure with additives mixed in to a depth of 4 inches, and (3) additives mixed to depths of 6-8 inches with possible subgrade treatment. A seal coat surface was applied to each, or a portion of each test section constructed under (3) while those test sections under (2) received no seal coat to full seal coat surfacing. Three basic phases make up the research project: (1) Construction and construction control of the 1000 ft. long test sections; (2) field testing of the test and control sections along with performance evaluations, and (3) laboratory evaluations of the untreated and treated soils taken from the test sections.