MATEC Web Conf.
Volume 337, 2021PanAm-Unsat 2021: 3rd Pan-American Conference on Unsaturated Soils
|Number of page(s)||6|
|Section||Fundamentals and Experimental Investigations|
|Published online||26 April 2021|
Soil cracking propagation due to dryness and its relation to suction
1 Federal University of Paraná, Pontal do Paraná Campus, Center for Marine Studies, Av. Beira-Mar s/n, 83255–976, Pontal do Paraná, PR, Brazil
2 Graduate Program in Civil Construction Engineering, Federal University of Paraná, 81531–980, Curitiba, PR, Brazil
* Corresponding author: email@example.com
Investigation of Crack Intensity Factor is essential as it affects the mechanical and hydraulic behaviour of soils. Soil water coming from the wet seasons or from the water table, is removed by evaporation during the driest season. The loss of water provokes a significant increase in suction. When it exceeds the tensile strength of the soil, cracks occur that can modify the mechanical and mainly hydraulic properties of the soil, creating preferred paths for water infiltration. Little research is conducted on quantifying cracking in soil relating it to its hydraulic properties. This research aims to investigate the cracking of soils with focus on analysing its relation to water content and soil suction. Soils from a specific region in Brazil with clay predominance are collected and characterized. Unsaturated soil specimens are prepared and subjected to environmental real conditions in order to progressively check the consequences caused by the environment in soils with different clay content during four weeks. The Crack Intensity Factor is measured along the time through image processing. The water content is monitored through volume water content sensors. The measured results are evaluated to correlate crack intensity factor as function of weather variables and soil water content.
© The Authors, published by EDP Sciences, 2021
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