Effects of silica additives on fracture properties of carbon nanotube and carbon fiber reinforced Portland cement mortar

Stynoski, Peter B.; Mondal, Paramita; Marsh, Charles

doi:10.1016/j.cemconcomp.2014.08.005

Cited by 165 publications

(84 citation statements)

References 23 publications

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“…The improvement in CTOD C and K IC of CF0.75 was greater at 68% over plain concrete. Similar improvement in fracture parameters were reported by Stynoski et al [26] for mortar reinforced with 0.25% of CF by volume. So it can be concluded that 0.75 is most ideal dosage of fibre in the concrete.…”

Section: Fracture Toughness and Ctod Csupporting

confidence: 76%

Experimental Evaluation of Mechanical Properties and Fracture Behavior of Carbon Fiber Reinforced High Strength Concrete

Kizilkanat

2016

Period. Polytech. Civil Eng.

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Section: Fracture Toughness and Ctod Csupporting

confidence: 76%

Experimental Evaluation of Mechanical Properties and Fracture Behavior of Carbon Fiber Reinforced High Strength Concrete

Kizilkanat

2016

Period. Polytech. Civil Eng.

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“…The experimental results showed a 22% increase in flexural strength and no increase in compressive strength of the mortar with the addition of MWCNTs. Recently, Stynoski et al [13] used dispersed plain carbon nanotubes (pCNTs) and silica-functionalized carbon nanotubes (sCNTs) at an amount of 0.125 wt% in cement mortars and reported an increase in flexural strength of 5-10% and in Young's modulus of 15-20% for both types of CNTs. More recently, Manzur et al [14] followed a parametric experimental investigation to determine an optimum mix dosage of CNTs for cement mortar.…”

Section: Introductionmentioning

confidence: 98%

Strength, energy absorption capability and self-sensing properties of multifunctional carbon nanotube reinforced mortars

Danoglidis

Konsta-Gdoutos

Gdoutos

et al. 2016

Construction and Building Materials

128

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“…Concrete is an inherently defective material; its F-T performance relies predominantly upon the interior structure of the material, such as its porousness, crack, pores types and size, transportation, etc. Many researchers have paid attention to the usage of nanomaterials, for example, nano-kaolinite clay [1], nano-silica [2][3][4], nano-TiO 2 [5], nanoalumina [6] and graphene nanomaterials [7][8][9][10][11][12][13][14][15][16][17][18][19][20], in the last decade. Studies have shown that the additive of these nanomaterials could improve the mechanical property and durability of cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

Chen

Yang

et al. 2019

Applied Sciences

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Graphene nanoplatelets (GNP) is a newly nanomaterial with extraordinary properties. This paper investigated the effect of GNP on the addition on freeze-thaw (F-T) resistance of concrete. In this experimental study, water to cement ratio remained unchanged, a control mixture without GNP materials and the addition of GNP was ranging from 0.02% to 0.4% by weight of ordinary Portland cement was prepared. Specimens were carried out by the rapid freeze-thaw test, according to the current Chinese standard. The workability, compressive strength, visual deterioration and mass loss of concrete samples were evaluated. Scanning electron microscopy also applied in order to investigate the micromorphology inside of the concrete. The results showed that GNP concrete has a finer pore structure than ordinary concrete; moreover, the workability of GNP concrete reduced, and the compressive strength of specimens was enhanced within the appropriate range of GNP addition; in addition, GNP concrete performed better than the control concrete in the durability of concrete exposed to F-T actions. Specimens with 0.05% GNP exhibited the highest compressive property after 200 F-T cycles compared with other samples. Appl. Sci. 2019, 9, 3582 2 of 12 two-dimensional (2D) Graphene Nanoplatelets (GNP), and evaluated the transport properties of concrete subjected to chloride and water environment, the results showed that GNP could enhance the resistance of concrete to chloride ion and water penetration. Mohammed et al. [15] found that GO addition could modify the microstructure and improve the compressive strength of cement matrix, and reported the GO could improve the freeze-thaw resistance of cement;however, they did not give the optimum dosage of GO. Experimental investigation showed that the addition of graphene oxide nanoplatelets (GOS) and GNP in mortar samples would increase the frost resistance of materials, and the discovered microstructure and modulus biography found that GNP and GOS could greatly refine the microstructure of mortar specimen [16]. Li et al. [17] firstly studied GO aggregates as particle size measurement and found that the aspect ratio of GO aggregates is much higher than that of the original GO nanosheets. Adding graphene and GO sheets to cement paste could improve the mechanical properties of the nanocomposite [20] but can reduce the workability of the nano cement materials [13]. Additionally, adding graphene nano-sheets (GNS) to cement paste could accelerate the hydration reaction and increase the quantity of hydration products, and could also improve chloride penetration resistance of cement paste [19]. Furthermore, adding GNP in cement would reduce the resistivity and make composites obvious pressure sensitivity [18]. Some recent research findings showed that graphene nano-sheets and their derivatives (GND) could modify cement-based materials [21]; we found that most recent attention focuses on the performance of graphene-based materials additions in cementitious materials, which can improve the better performanc...

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Effects of silica additives on fracture properties of carbon nanotube and carbon fiber reinforced Portland cement mortar

Cited by 165 publications

References 23 publications

Experimental Evaluation of Mechanical Properties and Fracture Behavior of Carbon Fiber Reinforced High Strength Concrete

Experimental Evaluation of Mechanical Properties and Fracture Behavior of Carbon Fiber Reinforced High Strength Concrete

Strength, energy absorption capability and self-sensing properties of multifunctional carbon nanotube reinforced mortars

Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

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