Estudo do comportamento resiliente de três solos da região de Campo Grande-MS e de relações entre o módulo de resiliência e resultados de ensaios de compressão simples / Study of the resilient behavior of three soils from Campo Grande-MS and analysis of relations among resilient modulus and results of compressive strenght tests

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

The resilient modulus knowledge (MR) is fundamental for pavement design, once it is necessary for stresses, strains and deflections calculus in its layers and subgrade, as well as, the analysis of system performance. Although field tests may be used to determine the dynamic behavior of soils, most of researchers favor laboratory tests, based on the fact that such tests are less constrained because of their carefully controlled conditions. Because laboratory procedures are considered complex and highly expensive, it is desirable to establish relationships among MR and other index properties that are relatively simple and usual in pavement construction. In this research, cyclic triaxial tests were performed to determine MR of three soils used in Campo Grande-MS roads. The performance of the models most commonly adopted to represent resilient modulus as a function of state of stress were verified. A mathematical expression among MR, obtained from the cyclic triaxial tests, and the initial tangent modulus, obtained from unconfined compression strength tests, were developed considering different states of stress. Finally, were analyzed the existence of relationships among soils studied in this research, and soils used in previous studies developed at EESC-USP. Results show that this type of empirical correlation presents a satisfactory results, however incisive conclusions cannot be taken without a large number and variety of soils.

ASSUNTO(S)

pavimentação módulo tangente inicial ensaio triaxial cíclico módulo de resiliência compressive strength test ensaio de compressão simples initial tangent modulus and pavement resilient modulus repeated load triaxial test

ACESSO AO ARTIGO

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