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Sara Rios; António Joaquim Pereira Viana Da Fonseca (2009)
Languages: English
Types: Conference object
Subjects: Geotecnia, Engenharia civil, :Civil engineering [Engineering and technology], :Engenharia civil [Ciências da engenharia e tecnologias], Geotechnics, Civil engineering
This paper will focus on the sensitivity of strength and stiffness properties of silty-sands, from granitic residual soil, which can be converted to a highly improved material if stabilized with cement. The study of soil stabilization with cement demands to quantify the influence of the cement percentage, porosity and water content adopted in the admixing process for different stresses and physical states. Firstly, this influence was quantified in terms of the unconfined strength and maximum deformability modulus executing unconfined compression tests as well as seismic wave velocities measurements in thoroughly controlled conditions in laboratory, varying the factors indicated above. Then, drained triaxial tests with very precise instrumentation were performed in some specimens with such a cement percentage and water content fixing the relationship between the void ratio and the volume of cement.
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    • ASTM D 5298, 1994. Standard Test Method in Measurement of Soil Potencial (Suction) Using Filter Paper. Annual Book of ASTM Standards. Vol.04.08
    • Caberlon, R., 2008. Influency of the key parameters on the stiffness, strength and dilatancy of an artificially cemented sand. PhD thesis, Federal University of Rio Grande do Sul (In Portuguese)
    • Chandler, R., Crilly, M., Montgomery-Smith, G., 1992. A low-cost method of assessing clay desiccation for low-rise buildings. Proc. Institute of Civil Engineers, Vol.92, No.2, pp.82-89
    • Consoli, N., Foppa, D., Festugato, L., Heineck, K., 2007. Key parameters for strength control of artificially cemented soils. Journal of Geotechnical and Geoenvironmental Engineering, February, pp.197-205.
    • Consoli, N., Rotta, G., Prietto, P., 2000. Influence of curing under stress on the triaxial response of cemented soils. Géotechnique, Vol.50, No.1, pp.99-105
    • LNEC E 264, 1972. Soil-cement. Compression test. Specification of the National Laboratory of Civil Engineering, Lisbon (In Portuguese).
    • Viana da Fonseca, A., Carvalho, C., Ferreira, C., Santos, J.A., Almeida, F., Pereira, E., Feliciano, J., Grade, J. & Oliveira, A., 2006. Characterization of a profile of residual soil from granite combining geological, geophysical and mechanical testing techniques. Geotechnical and Geological Engineering, Vol.24, pp.1307-1348
    • Viana da Fonseca, A., Ferreira, C. & Fahey, M., 2009. A framework interpreting bender element tests, combining time-domain and frequency domain methods. Geotechnical Testing Journal, ASTM (Published on line Dec. 2008; and in the journal March de 2009 - Vol. 32, No. 2).
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