Soil Elastic Modulus Determined by Ultrasound Tests

Abstract

The elastic constants obtained through conventional destructive (triaxial and resilience) tests can present great variability, even for soils with the same classification. Thus, a test is necessary to determine the elastic constants of soils in a reliable and replicable way. The ultrasonic technique is used to characterize rock and several construction materials (wood, cementitious matrices, metals), including the elastic parameters (elastic modulus, shear modulus, and Poisson's ratio). The aim of this study was to verify the correlation between the elastic modulus obtained through ultrasonic testing and through a simple unconfined compression test on compacted clayey soil. Test specimens were molded at normal compression energy with three moisture contents; the specimens were exposed to air and packed with plastic wrap for 120 days. After this period, we performed ultrasonic and compression tests. The technique presented great potential to study the mechanical behavior, with correlation coefficients over 0.97 for both parameters (compressive strength and static elastic modulus). We also verified that the ultrasonic testing is influenced mainly by the moisture content.

Fiberboard made from scrap denim: Characterization of its properties by effective bulk modulus elastography

“…1. Denim fibers and their microstructure Ultrasonic testing (Bhuiyan et al 2018), imaging (Boni et al 2018), and evaluations (Sarro and Ferreira 2019) have continuously contributed to academia (Tang et al 2019), industrial (Hwang et al 2019), and biomedical fields (Sigrist et al 2017). Ultrasound-based techniques provide information such as reflection intensity (Taheri and Hassan 2019) and speed of sound (Minh et al 2019) to estimate discontinuity imaging and elastic properties (Reese et al 2021).…”

Multi-phase homogenization procedure for estimating the mechanical properties of shot-earth materials

“…A particle size analysis of the excavated soil was performed, results are shown in Figure 5. According to the work by Sarro et al [33], a soil with such a particle size distribution and a bulk modulus of about 2…”

Caracterização De Construções Em Terra Compactada Utilizando a Propagação De Ondas Ultrassônicas

“…Em relação às propriedades mecânicas, diversos autores identificaram a possibilidade de utilização do ultrassom para estimativa de resistência, além da determinação das constantes elásticas de amostras de solo compactado (módulo de elasticidade, cisalhamento e coeficiente de Poisson) (BUI & MOREL, 2009;CHRIST & PARK, 2009;HAMMAM & ELIWA, 2013;HOFFMANN & GONÇALVES, 2010;INDRARATNA et al, 2012;PADURA et al, 2011;& FERREIRA, 2019;WANG et al, 2006;WANG et al, 2016;ZHEN et al, 2016) Embora a literatura ainda seja escassa sobre a utilização do ultrassom nesse material, nos últimos anos houve um aumento considerável do interesse da comunidade científica internacional pelo tema, com trabalhos recentes publicados, por exemplo, em Portugal, Irã, Espanha e Austrália (CANIVELL et al, 2018;NOOR-E-KHUDA & ALBERMANI, 2019;SILVA et al, 2018;TOUFIGH & KIANFAR, 2019), os quais apontam para a viabilidade de aplicação da técnica.…”

“…grandeza que os obtidos porSarro & Ferreira (2019) para corpos de prova cilíndricos, ensaiados no sentido das camadas de compactação e expostos em ambiente laboratorial por 120 dias. Os valores de VS obtidos por esses autores, para amostras moldadas na umidade ótima, foi de aproximadamente 900 m.s -1 .…”