Numerical and experimental investigation of concrete with various dosages of fly ash

Tee, Kong Fah; Mostofizadeh, Sayedali

doi:10.3934/matersci.2021036

Cited by 4 publications

(4 citation statements)

References 22 publications

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Section: Static Analysis Of Gpc Underground Pipementioning

confidence: 94%

“…The internal pressure of 414 KPa is also applied to the internal surface of the GPC pipe model. It is urgent to point out that the mechanical properties of the GPC pipe, such as the compressive strength and density made from PC with diverse dosages of 0, 10, 20, 30, 50, and 70% FA as replacement of PC weight were experimentally obtained in this study (Tables 11-13), along with the 9 parameters related to the nonlinear state of the GPC calibrated in this investigation (Table 14) [3,50]. 9, the applied traffic load is used as the uniform contact pressure with the value of 74,137 N/m 2 on the top surface of the backfill soil which is exactly located on the fault considered in the middle position of the GPC pipe as well (Figure 16).…”

Section: Static Analysis Of Gpc Underground Pipementioning

confidence: 96%

“…The shear transfer coefficients, (βt) and (βc), are used to consider the retention of shear stiffness in cracked concrete; these parameters range from 0 to 1.0, with 0 representing a smooth crack (complete loss of shear transfer) and 1.0 representing a rough crack (no loss of shear transfer) (ANSYS [29]). For this study, the shear transfer coefficient for an open crack (βt) is set to 0.3 to avoid convergence problems and the shear transfer coefficients for a closed crack (βc) is chosen as 1.0 [3,[30][31][32][33][34].…”

Section: Model Validationmentioning

confidence: 99%

“…Indeed, the reduction of vertical and horizontal displacement as the optimal response of buried GPC pipes under static and seismic loading is the central challenge for evaluating the structural performance of underground GPC pipes which need to be improved through reorganizing the effects of material properties of GPC and other main factors on the structural performance of GPC pipes. Based on preliminary studies, the mechanical properties of concrete (compressive strength, flexural strength) and FA inclusion in concrete content are two significant factors in the behavioral performance of concrete elements such as concrete cubes and beams [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Static and Seismic Responses of Eco-Friendly Buried Concrete Pipes with Various Dosages of Fly Ash

Mostofizadeh

Tee

2021

Applied Sciences

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In this paper, an evaluation based on the detailed failure has been conducted for underground sewage Geopolymer concrete (GPC) pipes under static and seismic loadings with consideration of the optimal time steps in the time-dependent process related to nonlinear behavior of GPC pipes in static and dynamic analyses. The ANSYS platform is employed for improving an advanced FE model for a GPC pipe which can simulate the performance of underground GPC pipes containing various percentages of fly ash (FA) as a Portland cement (PC) replacement. Subsequently, the time-dependent model is used to assess the efficacy of this concrete admixture (FA) in the structural response of the unreinforced GPC pipe in FEM. Indeed, the generated GPC pipe with the three-dimensional model has the potential to capture the nonlinear behavior of concrete which depicts the patterns of tensile cracking and compressive crushing that occur over the applied static loads in the FE model. The main issue in this paper is the assessment of the GPC pipe response typically based on the displacement due to static and seismic loadings. The numerical results demonstrated that the optimal displacement was obtained when the structural response had typically the lowest value for GPC pipes containing 10–30% FA and 20% FA under static and seismic loadings, respectively. Indeed, a reduction by 25% for the vertical displacement of a GPC pipe containing 20% FA was observed compared to that without FA under time-history analysis.

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Section: Static Analysis Of Gpc Underground Pipementioning

confidence: 94%

Section: Static Analysis Of Gpc Underground Pipementioning

confidence: 96%

Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Static and Seismic Responses of Eco-Friendly Buried Concrete Pipes with Various Dosages of Fly Ash

Mostofizadeh

Tee

2021

Applied Sciences

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Soil–pipe interaction and structural response under static and seismic loading for geopolymer concrete pipes

Tee,

Mostofizadeh

2024

Innov. Infrastruct. Solut.

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Spent coffee grounds enhanced compressive strength of cement mortar: an optimization study

Yee,

Khong,

Tee

et al. 2024

Discov Appl Sci

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This paper presents an optimization study of spent coffee grounds (SCG) as cement mortar additives to enhance mortar strength. In recent years, sustainable materials have begun finding their way into cement mortar, with SCG being one. There is limited optimization study on the SCG addition in mortars, hence this study was performed to optimize the curing time and SCG addition in cement mortar to achieve the highest compressive strength through response surface methodology. Scanning Electron Microscopy (SEM) characterization was carried out on the SCG particles to identify their physical properties. An Energy Dispersive X-ray (EDX) analysis was carried out to identify its chemical properties. Simultaneously, a workability test, the flow table test, is conducted to study the effect of SCG on the flowability of the cement mortar mixes. The synergistic effect between SCG content in cement mortar mixes and the curing period was statistically studied and analyzed. Both parameters were then optimized to obtain the best performance mix of SCG in cement mortar. It was found that 1.1% SCG and a curing day of 68 days produced the highest compressive strength (33.4MPa) of cement mortar. The Response Surface Methodology (RSM)-optimized cement mortar mix presented at least a 12.62% improvement in compressive strength from control cement mortar without SCG additives (28.77MPa). Experimental validation of the optimum condition showed a good agreement with a deviation of 3.12% in three replicates, thus indicating that the optimum model in this work can be used to model the compressive strength of the SCG-cement mortar mixture.

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Numerical and experimental investigation of concrete with various dosages of fly ash

Cited by 4 publications

References 22 publications

Static and Seismic Responses of Eco-Friendly Buried Concrete Pipes with Various Dosages of Fly Ash

Static and Seismic Responses of Eco-Friendly Buried Concrete Pipes with Various Dosages of Fly Ash

Soil–pipe interaction and structural response under static and seismic loading for geopolymer concrete pipes

Spent coffee grounds enhanced compressive strength of cement mortar: an optimization study

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