Documents disponibles écrits par cet auteur

Seismic modulus growth of lime-stabilised soil during curing / N. M. Toohey in Géotechnique, Vol. 62 N° 2 (Fevrier 2012) 

Public ISBD [article]  in Géotechnique > Vol. 62 N° 2 (Fevrier 2012) . - pp. 161 –170 Titre : Seismic modulus growth of lime-stabilised soil during curing Type de document : texte imprimé Auteurs : N. M. Toohey, Auteur ; M. A. Mooney, Auteur Année de publication : 2012 Article en page(s) : pp. 161 –170 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Geophysics  Pavements  and  roads  Mineralogy  Expansive  soils  Stiffness  Time  dependence  Monitoring  Compaction  Soil  stabilisation Résumé : This paper presents a study conducted to characterise seismic modulus growth in lime-stabilised soil (LSS) throughout 28-day curing using free-free resonance testing. The motivation for this study is to explore the prediction of 28-day modulus and strength from seismic modulus data collected during early curing, and in general to investigate the efficacy of seismic testing as a method of quality assessment for LSS. Measured E and G growth ranged from 250% to 900% during curing for the three soils. Modulus values and growth in modulus were significantly influenced by mineralogy and soil processing. The growth in seismic modulus for each soil exhibited a power law relationship with curing time. The 28-day modulus was estimated within 8% error for two soils using early curing modulus data, that is, through 7 days. Seismic modulus was found to correlate linearly with unconfined compressive strength (q u) throughout curing. The proportionality of E and q u remained constant during curing for each soil beyond day 3. The study shows that early curing seismic data – that is, through 7, 8 or 9 days – is capable of providing a good estimate of 28-day E and q u if the variability is reasonable (here, range/mean < 0·5). DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.P.122 [article] Seismic modulus growth of lime-stabilised soil during curing [texte imprimé] / N. M. Toohey, Auteur ; M. A. Mooney, Auteur . - 2012 . - pp. 161 –170. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 62 N° 2 (Fevrier 2012) . - pp. 161 –170 Mots-clés : Geophysics  Pavements  and  roads  Mineralogy  Expansive  soils  Stiffness  Time  dependence  Monitoring  Compaction  Soil  stabilisation Résumé : This paper presents a study conducted to characterise seismic modulus growth in lime-stabilised soil (LSS) throughout 28-day curing using free-free resonance testing. The motivation for this study is to explore the prediction of 28-day modulus and strength from seismic modulus data collected during early curing, and in general to investigate the efficacy of seismic testing as a method of quality assessment for LSS. Measured E and G growth ranged from 250% to 900% during curing for the three soils. Modulus values and growth in modulus were significantly influenced by mineralogy and soil processing. The growth in seismic modulus for each soil exhibited a power law relationship with curing time. The 28-day modulus was estimated within 8% error for two soils using early curing modulus data, that is, through 7 days. Seismic modulus was found to correlate linearly with unconfined compressive strength (q u) throughout curing. The proportionality of E and q u remained constant during curing for each soil beyond day 3. The study shows that early curing seismic data – that is, through 7, 8 or 9 days – is capable of providing a good estimate of 28-day E and q u if the variability is reasonable (here, range/mean < 0·5). DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.P.122