Durability, strength, and stiffness of compacted gold tailings – cement mixes

Consoli, Nilo César; Silva, Anderson Peccin da; Nierwinski, Helena Paula; Sosnoski, Jonatas

doi:10.1139/cgj-2016-0391

Cited by 45 publications

(13 citation statements)

References 30 publications

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“…This relationship was also shown to be valid for the expression of the tensile strength (qt) and on the assessment of durability of the treated mixtures [7][8].…”

Section: Introductionmentioning

confidence: 78%

Stiffness of lightly cemented sand under multiaxial loading

Corte¹,

Ibraim

Festugato

et al. 2019

E3S Web Conf.

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This paper presents experimental triaxial tests conducted on two lightly cemented sand samples on the set-up conditions of a Hollow Cylinder Torsional Apparatus (HCTA). The laboratory study has been carried out on an angular to sub-angular silica sand reinforced with Portland cement of high early strength. The samples have identical porosity/volumetric cement content ratio, η/Civ, values. The Young's modulus and shear modulus were measured by the application of a series of small unload-reload cycles at different investigation points along the triaxial stress path up to about 50% of the maximum deviatoric stress. At these investigation points, additional series of unload-reload cycles of higher amplitudes were also applied and the stiffness moduli assessed using local instrumentation. While the peak strength seems to be controlled by the density of the sand matrix, as extensive bond cementation damages occur at peak and pre-peak stages, the Young's modulus and shear modulus normalised by the void ratio function show the effect of the cementation ratio with higher values for the sample with higher cementation ratio.

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“…This relationship was also shown to be valid for the expression of the tensile strength (qt) and on the assessment of durability of the treated mixtures [7][8].…”

Section: Introductionmentioning

confidence: 78%

Stiffness of lightly cemented sand under multiaxial loading

Corte¹,

Ibraim

Festugato

et al. 2019

E3S Web Conf.

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“…Until now, the n=B-index has been used to correlate the tensile, uniaxial, and triaxial strength and stiffness of different binder-treated soils (Consoli et al 2007(Consoli et al , 2010(Consoli et al , 2011(Consoli et al , 2017b(Consoli et al , 2018. The porositybinder concept has not yet been applied to grouted soil, particularly foam-grouted soil.…”

Section: Description Of Uniaxial Strength and Stiffness Using The Por...mentioning

confidence: 99%

Rate- and Time-Dependent Mechanical Behavior of Foam-Grouted Coarse-Grained Soils

Jessen

Cudmani

2022

J. Geotech. Geoenviron. Eng.

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This paper experimentally investigates the mechanical properties of foam-injected gravel by means of uniaxial compression tests and uniaxial creep tests. Bonding of noncohesive soils by foam injection is a novel soil improvement method that can be applied for the stabilization of cohesionless soils at the tunnel face and behind soldier pile walls. Limited data on the mechanical behavior of foam-injected soils is available in the literature. A method for the preparation of homogeneous and reproducible test specimens was developed. The testing program included the variation of the factors that influence the mechanical behavior (e.g., initial soil density, grain size, strain rate, curing time, and stress level). Similar to cemented soils, the foam-injected soils show an elastoplastic stress-strain response and softening beyond the peak. The mechanical behavior is time-, stress-and rate dependent. The strength and stiffness can be described by the porosity-binder concept considering the influence of strain rate, soil density, and foam content.

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“…where a 1 � (σ max ω 21 /2); a 2 � (2ω 11 /ε max ); a 3 � b 11 − ω 11 ; a 4 � (σ max ω 22 /2); a 5 � (2ω 12 /ε max ); a 6 � b 12 − ω 12 ; and a 7 � (σ max /2)(b 2 + 1). ω 11 , ω 12 , b 11 , b 12 , ω 21 , ω 22 , and b 2 are the calculation parameters of the BP neural network. e specific meanings of these parameters are shown in Figure 10.…”

Section: Fitting the Stress-strain Curves Based On Bp Neuralmentioning

confidence: 99%

“…Considering that construction waste slurry has high water content, large cement content is necessary for achieving expected strength [19][20][21]. Consoli considered unconfined compressive strength (q u ) as a function of the porosity/cement index of compacted gold tailings-cement mixes [22]. Javdanian and Lee employed particle swarm optimization algorithm to estimate the unconfined compressive strength of stabilized cohesive soils using geopolymers [23].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Short-Term Strength Properties of Fiber/Cement-Modified Slurry

Jiang

Mao

et al. 2019

Advances in Civil Engineering

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e recycling of construction waste slurry is an urgent issue that needs to be solved in urban construction. To satisfy the requirements of subgrade filling, mechanical properties of fiber/cement-modified slurry were investigated. Unconfined compression tests were conducted for 7-day-cured specimens with a cement content of 5%, 10%, 15%, 20%, 25%, and 30%, respectively. Moreover, the effects of fiber contents (0.25%, 0.5%, 0.75%, and 1%, respectively) were also investigated for the specimens with a cement content of 20%. A formula satisfying the accuracy requirement was obtained by fitting the stress-strain curves using the back propagation (BP) neural network algorithm. Five parameters, including peak strength, failure strain, initial elastic modulus, residual strength, and energy dissipation, were used to characterize the short-term strength properties of fiber/cement-modified slurry. e analysis revealed that the cement content had a dominant effect on the short-term strength properties of fiber/cementmodified slurry, while the influence of fiber content was insignificant.

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Durability, strength, and stiffness of compacted gold tailings – cement mixes

Cited by 45 publications

References 30 publications

Stiffness of lightly cemented sand under multiaxial loading

Stiffness of lightly cemented sand under multiaxial loading

Rate- and Time-Dependent Mechanical Behavior of Foam-Grouted Coarse-Grained Soils

Characterization of Short-Term Strength Properties of Fiber/Cement-Modified Slurry

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