Kevin,
There are several materials and technologies that can be considered for grouting sandy soils. I suggest that you first define the problem more specifically in terms of (1) site conditions; e.g., soil profile, soil types and properties, groundwater conditions, topography, seismicity, etc.; (2) project requirements; e.g., area to be stabilized and its depth, types of loading, bearing capacity required, time available; cost limitations, and (3) environmental constraints and impacts; e.g., open area or constrained laterally and/or vertically by existing infrastructure, noise and vibration constraints, containment and/or disposal of waste materials, etc.
Then you will want to consider the types of grouting that may be best suited for meeting the project needs in terms of performance, cost, and sustainability. To obtain information and guidance in this, I suggest you go to GeoTechTools.org. This is a free,open access site that has information and interactive guidance for 25-30 different ground stabilization and improvement technologies, including grouting. For each technology there is a fact sheet, photos, case histories, design guidance, quality control and quality assurance information, cost information, example specifications, and a list of references for more details on the different aspects of the methods. To use this site you will need to set up a user name and password to log in, but that is an easy process once you go to the site.
I hope you find your project educational and fulfilling.
------------------------------
James K. Mitchell Sc.D, P.E., D.GE(Ret.), NAE, Dist.M.ASCE
Virginia Tech
jkm@...------------------------------