CHAPTER 18SOIL STABILIZATIONSoil stabilization may be broadly defined as thealteration or preservation of one or more soil propertiesto improve the engineering characteristics andperformance of a soil. This chapter is intended toprovide you with a brief overview of soil stabilizationin terms of (1) stabilization methods, (2) the types andselection of various chemical stabilizers used in soilstabilization and (3) general guidance and informationrelative to the design and testing of soil-cement andsoil-bituminous mixtures. For a thorough understandingof the subject of soil stabilization, you should combinethe study of this chapter with the study of the variousreferences cited within the chapter.METHODS OF STABILIZATIONThe two general methods of stabilization aremechanical and additive. The effectiveness ofstabilization depends upon the ability to obtainuniformity in blending the various materials. Mixing ina stationary or traveling plant is preferred; however, other means of mixing, such as scarifies, plows, disks,graders, and rotary mixers, have been satisfactory.The method of soil stabilization is determined bythe amount of stabilizing required and the conditionsencountered on the project. An accurate soil descriptionand classification is essential to the selection of thecorrect materials and procedures. Table 18-1 lists theTable 18-1.—Stabilization Methods Most Suitable for Specific Applications18-1
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