United States Department of Transportation
i
Effects of combined lime and fly ash stabilization on the elastic moduli of montmorillonitic soils : final report.
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1988-04-01
[PDF-6.55 MB]
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Abstract:A laboratory study using bentonite to simulate the montmorillonite component of soils common to Louisiana was undertaken to evaluate the effects of combined lime and fly ash additions on stabilization reactions. Samples containing bentonite (75 weight percent), Class C - fly ash (20 weight percent), and calcitic lime (5 weight percent) were mixed, compacted, and cured at either 23 deg C or 50 deg C for periods of time as long as 180 days. This investigation integrates the test results obtained from single specimens rather than to utilize one specimen for physical testing and others for mineralogical and micromorphological analyses in order to develop a better understanding of how the formation of new cementitious minerals affects the texture and increases the strength of the stabilized material. Test methods employed included X-Ray powder diffraction, scanning electron microscopy, compressive strength measurements, and the calculation of the elastic modulus for all specimens.
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