The aim of this paper is to evaluate the relationship between pore-size distribution and compressibility of a lateritic soil. Soil fabric was analysed under different conditions of preparation: compacted, reconstituted and intact, by means of mercury intrusion porosimetry tests on loading to different stress levels. The results show that all samples present bimodal pore distribution. However, the conditions of preparation and loading affected macropores more intensely, with subtle effects on micropores. This behaviour was attributed to the presence of aggregations with cementation. The compression curve of macro and micropores were determined and it was observed that the compression curve of macropores is very similar to the compression curve of the samples. In addition, it was observed that the fabric parameter regarding the uniformity of macro and micropores changed during loading. The new fabric parameter proposed captures the change in pore uniformity with loading. This parameter appears to be related to the soil compressibility, indicating that the most compressible samples also show greater changes in the uniformity of macropores.

中文翻译：

---

红土土壤孔径分布与压缩性的关系

本文的目的是评估红土土壤的孔径分布和压缩性之间的关系。土壤织物在不同制备条件下进行分析：压实、重组和完整，通过对不同应力水平加载的压汞孔隙率测试。结果表明，所有样品均呈现双峰孔分布。然而，制备和加载条件对大孔的影响更大，对微孔的影响很小。这种行为归因于具有胶结作用的聚集体的存在。测定了大孔和微孔的压缩曲线，观察到大孔的压缩曲线与样品的压缩曲线非常相似。此外，观察到有关大孔和微孔均匀性的织物参数在加载过程中发生了变化。提出的新织物参数捕捉了孔隙均匀性随负载的变化。该参数似乎与土壤可压缩性有关，表明可压缩性最强的样品在大孔隙的均匀性方面也表现出更大的变化。