Experimental study of permeability and elastic modulus of plastic concrete containing nano silica

Farajzadehha, Soroush; Mahdikhani, Mahdi; Moayed, Reza Ziaei; Farajzadehha, Soheil

doi:10.1002/suco.202000551

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…However, in this study, the 8% nano admixture showed more of an increased modulus of elasticity (8.5%) than other nano admixtures [12]. In another study by [28] the permeability of plastic concrete reduces as specimen ageing rises while compressive strength and elastic modulus increase. Moreover, adding nano-silica improves the concrete's compressive strength and dramatically reduces its permeability while maintaining a constant elastic modulus.…”

Section: Stress-strain Behaviour Of Concretecontrasting

confidence: 62%

An Evaluation of Mechanical Properties of Nano GGBFS in Concrete with Statistical Validation

Vincent,

Natarajan,

Amaladas

et al. 2023

Buildings

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Concrete, the most extensively utilized construction material, maintains its high demand owing to the swift urbanization and population expansion worldwide. However, cement manufacturing consumes considerable energy and emits substantial CO2 into the atmosphere. To ensure the construction industry’s sustainability, it is imperative to use eco-friendly and cost-effective products. As an additional cementitious ingredient in concrete, nano-based GGBFS (NGGBFS) is therefore employed to provide sustainable environmental impacts. The main purpose of this study is to assess the compressive strength, tensile strength, and Young’s modulus of NGGBFS, considering various replacement percentages (2%, 4%, 6%, 8%, 10%, and 12%) compared to conventional cement. The maximum compressive strength (72.68 MPa) and tensile strength (6.12 MPa) were obtained at 365 days for GB4 concrete. The Taguchi optimisation technique was employed to determine the interaction between mineral admixture and curing days on the mechanical properties of concrete; it reveals that GB4 mineral admixture and 365 days of curing days have good interaction between the factors taken for the study. The ANOVA quadratic regression model provided the optimisation process response. According to principal component analysis, the compression strength and Young’s modulus significantly influence the components because their loadings are so close (0.722 and 0.68). As a result, optimal combinations with equivalent strengths can be successfully created by substituting 8% nano-based GGBFS (GB4) in cement, offering an alternative path toward sustainable development.

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Section: Stress-strain Behaviour Of Concretecontrasting

confidence: 62%

An Evaluation of Mechanical Properties of Nano GGBFS in Concrete with Statistical Validation

Vincent,

Natarajan,

Amaladas

et al. 2023

Buildings

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“…Nanomaterials are extremely small particles with a particle size of 1 to 100 nm, with high specific surface area and good volcanic ash activity [21]. Scholars have introduced nano-SiO 2 materials into the field of civil engineering, and their main applications are the improvement of concrete materials and soils [22][23][24][25]. Ahmed et al [26] incorporated nano-SiO 2 in the synthesis of geopolymer binder with red mud as the main solid source and found that nano-SiO 2 contributed to the formation of C-S-H in the geopolymer and increased the compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Curing Mechanism of Red Mud-Based Stabilized Soil Co-Modified by Nano-SiO2 and Gypsum

Chen,

Ou,

Jiang

et al. 2023

Materials

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In order to effectively utilize red mud and reduce its occupation of land resources, as well as its impact on the environment, experiments were conducted to develop stabilized soil materials using nano-SiO2 synergistically modified red mud and to investigate the curing mechanism of stabilized soil. The unconfined compressive strength, microscopic morphology, and curing mechanism of the red mud-based stabilized soil materials with different amounts of modified materials were investigated. The test results show that after 7 days of curing, the unconfined compressive strength of red mud-based stabilized soil meets the compressive strength requirement of road base material when nano-SiO2, gypsum, and cement are synergistically modified. In such cases, the soil structure has the lowest fracture rate and the best structural compactness when the amount of nano-SiO2 is 1%. It is found that the needle-like and columnar calcium alumina in the modified red mud-based stabilized soil increases, and the binding energy of hydration product ions in the modified material is improved. The chemical curing mechanism of modified red mud-based stabilized soil includes hydration reaction, pozzolanic reaction, promotion effect of nano-SiO2, and enhancement effect of gypsum. On this base, a model of the early start hydration process of red mud-based stabilized soil promoted by nano-SiO2 is established.

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“…There are already many practical and environmentally friendly methods to improve the durability of reinforced concrete. These methods include: changing the formulation of concrete to manufacture new types of concrete [ 4 , 5 ], coating concrete reinforcement with protective layers [ 6 , 7 ], and adding polymer modifiers [ 8 – 11 ], rubber [ 12 ], and minerals [ 13 , 14 ] to concrete. The use of Class F fly ash or finely ground blast furnace slag as admixtures in concrete is convenient, relatively low-cost, and environmentally friendly [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Fractional-order numerical modeling to study chloride ion transport in concrete with fly ash or slag additions

Zhou,

Huang,

Chen

2023

PLoS ONE

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To better study the chloride ion migration in concrete with fly ash or ground granulated blast furnace slag under low fatigue load, a Caputo time fractional-order chloride diffusion model is developed in this paper. The model, grounded in Fick’s second law with a fractional-order derivative, employs an implicit numerical method for discretization, resulting in a fractional-order numerical scheme. The stability and convergence of the scheme are rigorously proven within the paper. The model’s unknown parameters are estimated using genetic algorithm with a grid method. To validate the model’s effectiveness, its numerical solution is juxtaposed with experimental results from chloride erosion studies. Furthermore, the fitting efficacy of the Caputo time fractional-order numerical scheme is compared with that of the classical Fick’s second law numerical scheme and analytical solution. The research findings demonstrate that the fractional-order numerical scheme can more accurately simulate the chloride concentration in concrete containing fly ash or slag. Additionally, the model shows promise in predicting the service life of fly ash or slag concrete.

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Experimental study of permeability and elastic modulus of plastic concrete containing nano silica

Cited by 10 publications

References 18 publications

An Evaluation of Mechanical Properties of Nano GGBFS in Concrete with Statistical Validation

An Evaluation of Mechanical Properties of Nano GGBFS in Concrete with Statistical Validation

Experimental Study on the Curing Mechanism of Red Mud-Based Stabilized Soil Co-Modified by Nano-SiO2 and Gypsum

Fractional-order numerical modeling to study chloride ion transport in concrete with fly ash or slag additions

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