Shear strength of cement-treated marine clay under triaxial and plane strain conditions

Abstract

Conventional triaxial compression and unconfined compressive strength tests are the most common testing methods used in the laboratory to determine the shear strength of soil. These tests employ the axisymmetric condition for testing. However, several geotechnical problems in the field can be approximated as plane strain (PS) problems. Hence, testing under PS condition would better represent such field conditions. PS testing has been widely performed on natural soils in the past. However, PS testing on cement-treated clays has not been reported in the literature. This paper attempts to explore the PS behaviour of cement-treated marine clays. A comparison of the strength behaviour of cement-treated clays under PS and triaxial tests has also been presented in this paper.

Enhancing Load-Bearing Capacity of Calcareous Sands through Gel Stabilization: A Mechanical and Material Characterization Study

“…Figure 4 shows that the of stabilized specimens rises with an increase in gypsum or Portland gel material content, independent of the gel material type. This indicates that cement notably increases the mechanical strength and rigidity of stabilized specimens via the impact of the interlocking and bonding structure [ 28 , 30 , 31 , 34 , 44 ]. Furthermore, unlike the findings reported by Sariosseiri and Muhunthan [ 34 ], all the stabilized specimens in the CU tests showed minimal signs of brittle breakage in their stress–strain curves.…”

“…Notably, among traditional laboratory methods, consolidation triaxial and UCS tests are prominent for assessing the shear strength of soil or sand. Laboratory experiments have demonstrated that the q ucs of stabilized soil increases as the gel material content rose across various soil types, such as Bangkok soft clay [ 28 , 29 ], marine clays [ 8 , 30 ], and silica sand [ 31 ]. Moreover, multiple researchers have conducted consolidation undrained triaxial (CU) tests to assess the shear strength of cement-treated soils.…”

Interface Shear Strength Behavior of Cement-Treated Soil under Consolidated Drained Conditions

“…In these two test procedures, a cylindrical soil specimen with standard dimensions and a length-to-diameter ratio of 2 is subjected to axisymmetric stress. According to the results of laboratory experiments, the unconfined compressive strength of the treated soil rose with the addition of cement [10][11][12][13][14][15]. The conclusions were based on the test results of different types of soils, including Bangkok soft clay [10,11], marine clays [12,14], Washington State soils [13], and silica sand [15].…”

“…According to the results of laboratory experiments, the unconfined compressive strength of the treated soil rose with the addition of cement [10][11][12][13][14][15]. The conclusions were based on the test results of different types of soils, including Bangkok soft clay [10,11], marine clays [12,14], Washington State soils [13], and silica sand [15]. Some researchers have demonstrated that the after-curing void ratio and water-cement ratio are enough to characterize the strength and compressibility of cement-treated clay [11,12].…”

“…Under unconfined and triaxial compression, cement-treated soils demonstrated much more brittle behavior than untreated soils [13]. For the plane strain test, laboratory tests revealed that the behavior of the shear strength and excess pore pressure of cement-treated soils were comparable to those of overconsolidated clays [14]. A few studies have conducted various types of direct shear tests to investigate the shear behavior of the modified soil.…”