The effect of aggregations on bimodal kaolinite soils

Vinícius de Oliveira Kühn, Manoel Porfírio Cordão-Neto , Bruna De Carvalho Faria Lima Lopes

Research output: Contribution to journalConference Contributionpeer-review

1 Citation (Scopus)

Abstract

Residual bimodal soils present great complexity of hydraulic and mechanical behaviour, due to the presence of aggregations, mineralogy and complex structures. These soils often present a clear bimodality with a wide difference between the size of intra-aggregate and inter-aggregate pores, of 2to 3 orders of magnitudes. The objective of this work is to produce a soil with bimodal characteristics using Kaolin Clay, in order to eliminate possible mineralogical, particle size and structural variables, since the clay mineral present in this material is mainly Kaolinite. Analyses of the effect of stable aggregations on soil structural behaviour were carried out by means of soil water retentioncurve (SWRC). For this, a new methodology was developed for the production ofstable aggregations, which were used to compose new bimodal soils. Then, a series of comparisons between the SWRC of the soil with and without aggregation were carried out. Results showed that the presence of aggregations had a direct impact on soil plasticity, particle size classification and compaction curve.
Original languageEnglish
Article number03003
Number of pages6
JournalE3S Web of Conferences
Volume92
DOIs
Publication statusPublished - 25 Jun 2019
Event7th International Symposium on Deformation Characteristics of Geomaterials - Glasgow, United Kingdom
Duration: 26 Jun 201928 Jun 2019
https://www.is-glasgow2019.org.uk/

Keywords

  • residual bimodal soils
  • aggregations
  • bimodal kaolonite soils
  • mineralogy
  • complex structures
  • Kaolin clay
  • soil water retention curve (SWRC)

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