Monitoring small-strain stiffness in cementitious porous materials and amended soils for geo-environmental applications
Monitoring small-strain stiffness in cementitious porous materials and amended soils for geo-environmental applications
The paper illustrates the use of the Bender Element (BE) technique to monitor the development of small-strain shear modulus, G0, in cement-bentonite (CB) mixtures and compacted soil-lime (SL) mixtures, both commonly employed in various geo-environmental applications. Three CB mixtures of different composition and one SL mixture were investigated. The G0 of the CB mixtures was found to increase with curing time, while the hydraulic conductivity significantly decreased. The cement-to-water ratio of CBs appeared to be the controlling factor on G0 whereas the hydraulic conductivity is also significantly influenced by other variables in composition (e.g. use of additives). The small-strain shear modulus of the soil-lime was found to increase with curing time with a trend that can be related to that of soil-lime chemical reactions. The results suggested that G0 can represent a useful parameter to monitor the progress of chemical reactions in soil-lime mixtures.
D. Bernardo; Marta Di Sante; Evelina Fratalocchi; Francesco Mazzieri
9th International Congress on Environmental Geotechnics (ICEG2023)
Advances in Testing and Material Characterization
Geoenvironmental Engineering, Lime Stabilization, Shear Strength of Underground Materials
https://doi.org/10.53243/ICEG2023-244
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