EXPERIMENTAL CHARACTERIZATION OF JET GROUT USING DIGITAL IMAGE CORRELATION TECHNIQUE

АУТОР(И) / AUTHOR(S): Ksenija Kavarić, Marko Popović , Aleksandar Savić , Sanja Jocković , Milena Raković

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DOI:  10.46793/ACUUS2025.2.2.216

САЖЕТАК / ABSTRACT:

Jet grouting is a well-established and versatile ground improvement technique widely used to enhance the mechanical performance of weak or heterogeneous soils. It has proven effective across diverse soil conditions, motivating further experimental and parametric characterization. While sustainability goals have encouraged the use of eco-friendly additives, cement-based mixtures remain predominant due to their adaptability and reliable performance. Despite its widespread application, the mechanical behavior and failure mechanisms of in-situ jet grout columns have received limited experimental investigation, especially under uniaxial loading. This study explores the potential of Digital Image Correlation (DIC) as an advanced, non-contact optical technique for measurement of full-field displacements and strains on the surface of an object and fracture behavior during mechanical testing. Although DIC is more or less regularly used for concrete, natural rock, and composites, its application to jet grouting materials is rarely reported. Core samples were obtained from an active construction site, specifically from a coarse-grained soil layer, and were subjected to laboratory testing to evaluate key mechanical parameters such as: compressive strength, stiffness, and stiffness-to-strength ratios. The experimental approach aims to assess material variability and evaluate the relevance of standard modulus-based design parameters. The findings contribute to a deeper understanding of jet grout behavior and demonstrate the value of DIC as a complementary method for the performance assessment and design verification of jet grouted systems in coarse-grained soils. 

КЉУЧНЕ РЕЧИ / KEYWORDS:

jet grout, digital image correlation, uniaxial strength, modulus

ПРОЈЕКАТ / ACKNOWLEDGEMENT:

This investigation is financially supported by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia under Contract No.: 200092.

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