Laboratory Evaluation of the Effect of Persian Gum on the Strength Parameters of Different Soil-Structure Interfaces

Document Type : Original Article

Authors

• Mohammad Milad Shirazi Nejad
• Mohammadreza Khanmohammadi
• Hamid Hashemolhosseini

Department of Civil Engineering, Isfahan University of Technology

10.22067/jfcei.2024.86039.1278

Abstract

Evaluation of mechanical behavior of the soil-structure interface has been the focus of many researchers as an effective factor on the strength performance and deformation of the structure. Since the interaction of the structure and the soils around it will have a great impact on the soil bearing capacity, it is important to study the physical conditions. In this study, taking into account the curing time, effect of using Persian gum and the roughness of the steel on the behavior of the soil-structure interface using large-scale direct shear test have been investigated. The Persian gum was used in three amounts of 0.3, 0.6 and 0.9% on three smooth, rough and geotextile covered surfaces. Based on the results, by injecting Persian gum into the soil-candle interface, the adhesion between soil and contact surface increases by about 20 times and the internal friction angle increases by one degree. The rate of increase of strength parameters decreases with increasing curing time.

Keywords

• Soil-structure interface
• Persian gum
• Curing time
• Roughness
• large-scale direct shear test

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