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.

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The application of nondestructive testing in buildings with soil aims to conduct inspections and technological control with minimal interventions. To achieve the objectives proposed study mini panels in proportions of 1: 8, 1:12, 1:16 (Portland cement: soil). The ultrasound test enabled to correlate the elastic properties of the mini panels. It was possible to detect the excellent correlations between the modulus of elasticity of the differences recipes.

ResumoA preocupação com o meio ambiente deve ser uma ação mundial por parte de todos os segmentos da sociedade. Atualmente, a construção civil é responsável por quase 50% do volume de resíduos sólidos gerados. O objetivo desta pesquisa foi verificar o desempenho mecânico de peças de concreto para pavimentação (pavers) com substituição parcial do agregado por resíduo cerâmico. Após definição dos teores de substituição, foram moldados pavers conforme NBR 9781:2013. Conforme características do lote do resíduo e traço adotado, é viável fabricar pavers com até 50% de substituição, considerando o comportamento mecânico descrito na norma citada.Palavras-chave: passivo ambiental, resíduos sólidos, agregado reciclado.