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Strength and dilatancy of sand before and after stabilisation with colloidal-silica gel
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SYSNO ASEP 0559046 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Strength and dilatancy of sand before and after stabilisation with colloidal-silica gel Author(s) Triantafyllos, P.K. (GR)
Georgiannou, V.N. (GR)
Pavlopoulou, E.M. (GR)
Dafalias, Yannis F. (UT-L)Number of authors 4 Source Title Geotechnique. - : Institution of Civil Engineers - ISSN 0016-8505
Roč. 72, č. 6 (2022), s. 471-485Number of pages 14 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords fabric/structure of soils ; laboratory tests ; sands ; shear strength ; soil stabilisation Subject RIV JN - Civil Engineering OECD category Materials engineering R&D Projects EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access UT WOS 000803602000001 EID SCOPUS 85119185222 DOI 10.1680/jgeot.19.P.123 Annotation To evaluate the effect of stabilisation by using a colloidal silica aqueous gel on the subsequent behaviour of sand, the dilatancy and peak and ultimate strength characteristics of M31 sand were investigated before and after stabilisation. Triaxial compression tests were performed in drained and undrained mode, at effective stresses ranging from 100 to 6000 kPa. Important changes in the sand's mechanical behaviour were observed after stabilisation, including a significant increase in stress ratio and dilatancy rate at peak and a relocation of the treated sand's critical state line in the e–p′ plane, substantially above that manifested by the untreated sand, however, the two lines converged at high stresses. The results confirm a state-dependent behaviour for the sand that is not applicable to the treated sand, which exhibits predominantly stress-dependent behaviour. A modified state parameter was used to normalise the treated sand's behaviour at peak failure. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2023 Electronic address https://www.icevirtuallibrary.com/doi/10.1680/jgeot.19.P.123
Number of the records: 1