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<p>Limestone is a crucial geomaterial due to its numerous applications and usefulness worldwide. Detailed investigation into the mechanical behaviour of this important material is very important and it is conducted in this paper using fundamental structure-based framework. Extensive oedometer tests were carried out on the intact and reconstituted soft limestone samples together with the physical, microstructural, chemical and mineralogical tests. The soft limestone is fine grained and poorly graded. The microstructures of the intact and reconstituted samples are dominated by continuous clusters from aggregation of particles and the fabrics are also homogeneous and isotropic. Chemical compositions are predominantly calcite and mineralogy is dominated by limestone. The soft limestone has convergent behaviour and this could be linked to the homogenous fabric. <b>The compressibility of limestone as obtained from compression indices is low.</b> The intact compression paths reach states outside the 1D-NCL. The effect of structure is small to high using void index normalization and it is positive using quantitative stress sensitivity. The structure has not been completely removed at the highest stresses reached in the tests which is confirmed by the fabric of the intact samples which is more robust after compression test. <b>The limestone could use in cement production and applied as foundation fill material.</b></p>

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Investigation into Engineering Behaviour of Soft Limestone Considering Fundamental Structure-Based Framework

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Ismail Adeniyi Okewale,
  • Moses Adeyemi Odeniyi

摘要

Limestone is a crucial geomaterial due to its numerous applications and usefulness worldwide. Detailed investigation into the mechanical behaviour of this important material is very important and it is conducted in this paper using fundamental structure-based framework. Extensive oedometer tests were carried out on the intact and reconstituted soft limestone samples together with the physical, microstructural, chemical and mineralogical tests. The soft limestone is fine grained and poorly graded. The microstructures of the intact and reconstituted samples are dominated by continuous clusters from aggregation of particles and the fabrics are also homogeneous and isotropic. Chemical compositions are predominantly calcite and mineralogy is dominated by limestone. The soft limestone has convergent behaviour and this could be linked to the homogenous fabric. The compressibility of limestone as obtained from compression indices is low. The intact compression paths reach states outside the 1D-NCL. The effect of structure is small to high using void index normalization and it is positive using quantitative stress sensitivity. The structure has not been completely removed at the highest stresses reached in the tests which is confirmed by the fabric of the intact samples which is more robust after compression test. The limestone could use in cement production and applied as foundation fill material.