Triaxial behavior of fiber-reinforced cemented sand

Kutanaei, Saman Soleimani; Choobbasti, Asskar Janalizadeh

doi:10.1080/01694243.2015.1110073

Cited by 79 publications

(19 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cement stone will generate a large number of microcracks in the initial stage of the external load. When the crack extends to the CF, it will bear the load of the part of the cement stone and bridge the opposite sides of the crack due to higher mechanical properties of CFs (Figure 7(a)), so the crack needs to consume more energy to propagate further [32,33]. When the crack further expands, the energy of the extended crack is not enough to 7 International Journal of Polymer Science cause the CF to break, and the crack deviates from the original route and continues to expand along the interface where the bonding force is not strong, which is manifested by the fact that the shape of the crack is curved (Figure 7(b)), thereby delaying the crack propagation [34][35][36].…”

Section: Mechanism Of Carbon Fiber-reinforced Cement Stonementioning

confidence: 99%

Mechanical Properties and Enhancement Mechanism of Oil-Well Cement Stone Reinforced with Carbon Fiber Surfaces Treated by Concentrated Nitric Acid and Sodium Hypochlorite

Zhang

et al. 2020

International Journal of Polymer Science

View full text Add to dashboard Cite

In this study, carbon fibers (CFs) were used as toughening materials to improve the mechanical properties of cement stone. The surfaces of the CFs were treated with concentrated nitric acid and sodium hypochlorite to increase the interfacial adhesion between the CFs and the cement. The CFs subjected to surface treatment were evaluated by scanning electron microscopy and infrared analysis to find a significant increase in the number of oxygen-containing groups on the surface. The CFs subjected to surface treatment were added to the cement matrix. The effect of the modified CFs on the mechanical properties of the cement matrix was evaluated by testing the means of mechanical properties. The maximum tensile strength, maximum compressive strength, and ultimate strain of the enhanced cement stone of the CFs treated with sodium hypochlorite increased by 68.2%, 12.0%, and 4.4%, respectively. The maximum tensile strength, maximum compressive strength, and ultimate strain of the enhanced cement stone of the CFs treated with concentrated nitric acid increased by 72.7%, 14.7%, and 4.5%, respectively. The addition of CFs to the cement stone exerted no effect on the type of cement hydration products, as determined by infrared analysis and X-ray diffraction. The toughening mechanism of the modified CFs added to the cement stone was ultimately explored, and the bridging effect, deflection effect, and pull-out effect of cracks were evaluated.

show abstract

Section: Mechanism Of Carbon Fiber-reinforced Cement Stonementioning

confidence: 99%

Mechanical Properties and Enhancement Mechanism of Oil-Well Cement Stone Reinforced with Carbon Fiber Surfaces Treated by Concentrated Nitric Acid and Sodium Hypochlorite

Zhang

et al. 2020

International Journal of Polymer Science

View full text Add to dashboard Cite

show abstract

“…It can be seen from Figures 10(a) and 10(b) that when the crack passes through the carbon fiber, the carbon fiber can crack at the tip by the bridging action of the carbon fiber in the cement stone. For bridging, there is a closed stress, which prevents the crack from continuing to expand to a certain extent and improves the mechanical properties of the cement stone [42].…”

Section: Microscopic Characterization Of Oil Well Cement Stonementioning

confidence: 99%

“…After the carbon fiber was added into the cement stone, the whole stressstrain process was prolonged, the ultimate stress of the cement stone was increased by about 25%, the elastic modulus was lowered by 29%, and the peak strain was increased by 144%. Therefore, the addition of reinforcements enhanced the ductility and toughness of cement stone [42].…”

mentioning

confidence: 97%

Preparation of Nano-SiO₂/Carbon Fiber-Reinforced Concrete and Its Influence on the Performance of Oil Well Cement

Liu

Guo

Yang

et al. 2019

International Journal of Polymer Science

View full text Add to dashboard Cite

In view of the oilfield well thin oil layer, small gap, and side drilling cementing after perforating and subsequent stimulation caused by the cement ring embrittlement (i.e., secondary channeling), the preparation of nano-SiO2/carbon fiber-reinforced body and its influence on the performance of oil well cement were studied to improve the cement stone and enhance its adaptability to oil well pressure in this study. Carbon fibers were treated by liquid phase oxidation and a coupling agent, and the “grafting to” was used to bond nano-SiO2 and carbon fibers. It was found that the mechanical properties of the enhanced cement stone are far better than those of the blank cement stone. The compressive strength and tensile strength of the enhanced oil well cement stone were increased by 25% and 26%, respectively, compared with those of the blank oil well cement sample; the modulus of elasticity was reduced by 29%. Finally, the enhancement mechanism of SiO2/carbon fiber reinforcement on cement stone was explored by infrared, scanning electron microscopy, and XRD patterns. The deflection effect, pull-out effect, and bridging effect of crack were obtained.

show abstract

“…e results of the previous studies show that the compression strength, the shear strength, the tensile capacity, and the bearing capacity of soil can be effectively improved by the reinforcement of polypropylene and other synthetic fibers. Besides, the strain of soil under failure can be also increased, and the loss of strength can be reduced, which makes the soil sample represent higher toughness [7,8].…”

Section: Introductionmentioning

confidence: 99%

Studying Shear Performance of Flax Fiber-Reinforced Clay by Triaxial Test

Yang

Xiao

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

Laboratory triaxial tests were carried out to investigate the reinforcement mechanism, to study the characteristics of flax fiber-reinforced clay, and to discuss the effect on stress-strain relationship and shear strength parameters of flax fiber-reinforced clay in different flax fiber content and different confining pressure. Respectively, the ratio of fiber content to clay by weight is 0.2%, 0.4%, 0.6%, 0.8%, and 1.0%, and the confining pressure is 100 kPa, 200 kPa, and 300 kPa in triaxial test. The test results show that, the shear strength of flax fiber-reinforced clay is greater than that of pure clay. Compared with the pure clay, the shear strength of flax fiber-reinforced clay increased as the cohesion and friction increased; while the increase of the friction is relatively small, the increase of cohesion is large. The shear strength firstly increased and then reduced with the increase of flax fiber content. When the fiber content was 0.8%, the shear strength reached a peak value, and the shear strength reduced with the further increase of fiber content.

show abstract

Triaxial behavior of fiber-reinforced cemented sand

Cited by 79 publications

References 33 publications

Mechanical Properties and Enhancement Mechanism of Oil-Well Cement Stone Reinforced with Carbon Fiber Surfaces Treated by Concentrated Nitric Acid and Sodium Hypochlorite

Mechanical Properties and Enhancement Mechanism of Oil-Well Cement Stone Reinforced with Carbon Fiber Surfaces Treated by Concentrated Nitric Acid and Sodium Hypochlorite

Preparation of Nano-SiO₂/Carbon Fiber-Reinforced Concrete and Its Influence on the Performance of Oil Well Cement

Studying Shear Performance of Flax Fiber-Reinforced Clay by Triaxial Test

Contact Info

Product

Resources

About

Triaxial behavior of fiber-reinforced cemented sand

Cited by 79 publications

References 33 publications

Mechanical Properties and Enhancement Mechanism of Oil-Well Cement Stone Reinforced with Carbon Fiber Surfaces Treated by Concentrated Nitric Acid and Sodium Hypochlorite

Mechanical Properties and Enhancement Mechanism of Oil-Well Cement Stone Reinforced with Carbon Fiber Surfaces Treated by Concentrated Nitric Acid and Sodium Hypochlorite

Preparation of Nano-SiO2/Carbon Fiber-Reinforced Concrete and Its Influence on the Performance of Oil Well Cement

Studying Shear Performance of Flax Fiber-Reinforced Clay by Triaxial Test

Contact Info

Product

Resources

About

Preparation of Nano-SiO₂/Carbon Fiber-Reinforced Concrete and Its Influence on the Performance of Oil Well Cement