Strength Characterization of Sand-Bentonite Mixtures and the Effect of Cement Additives

Iravanian, Anoosheh; Bilsel, Huriye

doi:10.1080/1064119x.2014.991463

Cited by 7 publications

(3 citation statements)

References 27 publications

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“…This issue is based on the bending theory that assumes the material to be linear elastic with equal Young's modulus in tension and compression and ignores the self-weight of the beam [14,42,48]. In general, the flexure beam test apparatus developed by Leonards and Narain [56] to determine the tensile strength of cohesive soil using a simple flexure test involving a claybeam to predict the cracking behavior of earth dams [9,57]. The apparatus consists of loading system applied to the middle of section with ball-bearing balls along with pulley to prevent any eccentricity to occur.…”

Section: Flexural (Bending) Beam Testmentioning

confidence: 99%

Tensile Testing of Soils: History, Equipment and Methodologies

et al. 2020

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Tensile strength of soil is indeed one of the important parameters to many civil engineering applications. It is related to wide range of cracks specially in places such as slops, embankment dams, retaining walls or landfills. Despite of the fact that tensile strength is usually presumed to be zero or negligible, its effect on the erosion and cracks development in soil is significant. Thus, to study the tensile strength and behavior of soil several techniques and devices were introduced. These testing methods are classified into direct and indirect ways depending on the loading conditions. The direct techniques including c-shaped mold and 8-shaped mold are in general complicated tests and require high accuracy as they are based on applying a uniaxial tension load directly to the specimen. On the other hand, the indirect tensile tests such as the Brazilian, flexure beam, double punch and hollow cylinder tests provide easy ways to assess the tensile strength of soil under controlled conditions. Although there are many studies in this topic the current state of the art lack of a detailed article that reviews these methodologies. Therefore, this paper is intended to summarize and compare available tests for investigating the tensile behavior of soils.

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Section: Flexural (Bending) Beam Testmentioning

confidence: 99%

Tensile Testing of Soils: History, Equipment and Methodologies

et al. 2020

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“…Venkatarama Reddy et al [17] explored the effect of clay particles on the durability, strength and water absorption of soil-cement mixtures and showed that a mixture having clay particles of 14-16% had the greatest strength. Iravanian and Bilsel [18] compared the strength of sand-bentonite admixtures with and without adding the cementing agent and concluded that adding cement to the sand-bentonite mixtures led to an increase in the strength and deformation modulus. Greatest value of strength was observed in a sample involving 75% of sand and 25% of cement without clay.…”

Section: Introductionmentioning

confidence: 99%

The strength and microstructure of cemented sand-gravel (CSG) mixture containing fine-grained particles

Karimi

Aghajani

2023

Geo-Engineering

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The hardfill embankments are composed of cemented sand-gravel (CSG) mixtures. In some cases, however, sand and gravel used in the mixture contain fine-grained fraction. This paper aimed to study the mechanical behavior and microstructure of CSG mixtures in which the base soil contains fine-grained particles with different plasticity specifications. Various contents of kaolinite and bentonite were added to a sand-cement mixture with different cement contents and uniaxial strength and deformation modulus in the mixtures were measured at two curing ages. According to the results, in low cement mixtures, the mixture containing 10% of the additive exhibited the maximum strength and deformation modulus, regardless of the additive type. In a family of bentonite-containing mixtures with higher cement, the strength of mixtures decreased with increasing the bentonite content. However, the mixture with higher cement and 10% of kaolinite presented the best performance from in terms of strength and stiffness. Analyzing the mineralogy and SEM images of mixtures showed that the structure of base soil attained the best packing and a strong matrix was devolved inside the mixture with 10% of fine additive. Furthermore, the kaolinite particles in the mixture containing 10% kaolinite contributed to the hydration process of cement.

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“…Shooshpasha & Shirvani (2015) reported that the use of cement to stabilize sandy soils resulting in increased strength parameters, reduced strain at failure, and changed soil behavior to a noticeable brittle behavior. Iravanian & Bilsel (2016) studied the sand-bentonite landfill barrier material with and without cement additive, at different periods of aging. The strength characterization of mixtures was a marked improvement with cement inclusion and that the effect of aging has been very effective.…”

Section: Introduction and Past Studiesmentioning

confidence: 99%

Geotechnical and other characteristics of cement-treated low plasticity clay

Alkiki¹,

Abdulnafaa²,

Aldaood³

2021

S&R

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This research work examines the utilization of cement in order to improve low plasticity clay soil. The soil samples treated with 2, 4 and 6% cement percents and cured for different curing times extended to 90 days. Laboratory investigations include unconfined compression, indirect tensile, gas permeability and microstructural tests, which were conducted on the tested samples. The soil-water retention behavior has been also investigated. The test results showed that the cement addition improved both the compressive and tensile strength properties of soil specimens. These strength properties were also increased with curing times. pH and electrical conductivity values were good indicators for the enhancement in the strengths properties. The results of micro structural tests illustrated that the natural soil specimens contain voids and the open structure. Further, these tests showed the cementation of soil grains and filling the voids among soil grains with cementing compounds. Gas permeability and soil-water retention behavior of soil specimens are strongly related to the variations in the soil structures. Further examination illustrated that in the case of low cement content, the pore size distribution (PSD) and the efficiency of gas permeability are more sensitive to curing times.

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Strength Characterization of Sand-Bentonite Mixtures and the Effect of Cement Additives

Cited by 7 publications

References 27 publications

Tensile Testing of Soils: History, Equipment and Methodologies

Tensile Testing of Soils: History, Equipment and Methodologies

The strength and microstructure of cemented sand-gravel (CSG) mixture containing fine-grained particles

Geotechnical and other characteristics of cement-treated low plasticity clay

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