Effectiveness of Lubricants and Fly Ash Additive on Surface Damage Resistance under ASTM Standard Operating Conditions

Bui, Tuan-Anh; Pham, Vuong-Hung; Nguyen, Duc-Toan; Bui, Lam Thu

doi:10.3390/coatings13050851

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…This linear relationship allows for the determination of the viscositytemperature relationship of multi-grade oil as a first-order relationship. By understanding and characterizing this relationship, engineers and technicians can effectively optimize lubricant performance across different temperature ranges, ensuring proper lubrication and minimizing friction-related issues during engine operation [34].…”

Section: Experimental Oilsmentioning

confidence: 99%

Investigating the Impact of Fly-Ash Additive on Viscosity Reduction at Different Temperatures: A Comparative Analysis

Bui

2023

Applied Sciences

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The viscosity of lubricating oils is influenced by fly-ash additives and temperature, as they play a crucial role in regulating the viscosity of oils. Fly-ash additives are added to lubricating oils to improve oxidation resistance and prevent deposit formation, which may reduce viscosity loss at high temperatures. This study aimed to investigate the impact of fly-ash additives and temperature on the viscosity of oils B, C, and A. The experimental methodology involved comparing the viscosity of these oils with and without the addition of a 0.5% fly-ash additive. Viscosity measurements were taken at different temperatures. The results showed significant changes in viscosity after incorporating the fly-ash additive. At 25 °C, oils B, C, and A exhibited viscosity increases of 6.2%, 8.1%, and 13.8%, respectively, compared to the samples without the additive. Similarly, at 75 °C, the viscosity increments were 10.2%, 11.5%, and 22.8% for oils B, C, and A, respectively. At 85 °C, the corresponding increments were 11.1%, 16.6%, and 32.8%. These findings highlight the effectiveness of fly-ash additives in reducing the impact of temperature on oil viscosity, with oil A demonstrating the highest efficacy. By adjusting the viscosity of the oil at different temperatures, the fly-ash additives contribute to maintaining stable lubricating performance. Understanding the influence of fly-ash additives and temperature on oil viscosity is crucial for optimizing the performance of lubricants across various temperature conditions. Additionally, this knowledge assists in selecting the appropriate additive ratios for specific applications, thereby ensuring optimal lubricant performance.

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Section: Experimental Oilsmentioning

confidence: 99%

Investigating the Impact of Fly-Ash Additive on Viscosity Reduction at Different Temperatures: A Comparative Analysis

Bui

2023

Applied Sciences

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“…Real-life images of fly ash and observations under an electron microscope are presented in Figure 2. The authors also conducted a study on the chemical composition of fly ash in Vietnam, where the predominant components were found to be SiO2 and Al2O3, constituting over 80% of the composition [21][22][23]. The detailed composition of fly ash is outlined in Table 1.…”

Section: Specification Of Coal Fly Ashmentioning

confidence: 99%

Application of EDEM Simulation for Calculating and Optimizing a Closed Coal Fly Ash Screw Conveyor

Tran,

Bui,

Bui

2023

Applied Sciences

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In contemporary bulk material transportation systems, closed screw conveyors have become prevalent. These conveyors, enclosed within troughs or cylindrical bodies, effectively mitigate environmental contamination and material toxicity during transit. Their hermetic design prevents material dispersion by wind, thereby minimizing losses and preserving the integrity of raw materials, particularly those with potential health implications such as urea and cement. Consequently, employing a screw conveyor constitutes a prudent safety measure. Despite the widespread use of screw conveyors, a comprehensive understanding of the behavior of material particles within these systems remains elusive and subject to discrepancies across various methodologies. Presently, a multitude of calculation methods and applications exist, resulting in disparities between theoretical computations and practical implementation. Drawing upon Alan W. Roberts’ meticulously devised calculation methodology, renowned for its precision, the authors have developed a swift computational tool utilizing VBA Excel software 2023. Additionally, EDEM simulation software was employed to model granular material behavior. The ensuing calculations guided the selection of optimized technical dimensions for the screw conveyor, which were then fabricated and subjected to real-world testing at the Vinh Tan thermal power plant. Remarkably, the achieved output capacity demonstrated a mere 7% deviation from calculations performed with the VBA program and a 2% variation from those conducted via EDEM simulation. Furthermore, a comprehensive graph depicting the relationship between screw conveyor speed and capacity has been provided, affording a means to finely tune throughput with exceptional accuracy along the production line. The results obtained provide the basis for the development of a device that meets the required capacity specifications accurately and precisely on the first attempt. This accomplishment satisfies stringent capacity standards without the need for any adjustments or modifications, all while ensuring minimal cost and time efficiency.

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“…Tuerkel [30] prepared flowable fly ash by adding limestone sand with particle sizes of 0-5 mm, and the results showed that as the limestone sand content increased, the water absorption of the flowable fly ash increased. Chittoori [31][32][33][34] prepared flowable fly ash by adding two types of clay, high-plasticity clay and a 1:1 mixture of high-and low-plasticity clay, and a comparative analysis revealed that flowable fly ash with only high-plasticity clay exhibited better overall performance. It can be seen that adding soil as an aggregate to flowable fly ash is feasible, but the type and nature of the soil have a significant impact on its properties.…”

Section: Introductionmentioning

confidence: 99%

Study of the Design and Mechanical Properties of the Mix Proportion for Desulfurization Gypsum–Fly Ash Flowable Lightweight Soil

Zuo,

et al. 2023

Coatings

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In order to solve the global problem of bridge head jumping caused by the insufficient compaction of the roadbed in the transition section of highways and bridges, a desulfurization gypsum–fly ash flowable lightweight soil without vibration, capable of self-compaction, low bulk density, and economic and environmental protection, has been developed. This study selected low-grade cement, industrial waste (fly ash and desulfurization gypsum), and Yellow River silt as the raw materials for the design of the mix ratio of a desulfurization gypsum–fly ash flow-state lightweight soil mix. Through multiple indoor experiments, the influence of cement content, silt content, and the fly ash/desulfurization gypsum quality ratio on its fluidity and mechanical properties was systematically studied. The stress–strain relationship under uniaxial compression was analyzed and the strength formation mechanism was revealed through scanning electron microscopy (SEM). The results show that the mechanical properties of the prepared desulfurization gypsum–fly ash flowable lightweight soil meet the engineering requirements. Increasing both the cement and fly ash content results in the decreased fluidity of the desulfurization gypsum and fluidized fly ash. However, as the mass ratio of fly ash to desulfurization gypsum increases, the fluidity reaches its maximum when the mass ratio of fly ash to desulfurization gypsum is 2:1. Based on the stress–strain relationship test results, a uniaxial compressive constitutive model of the desulfurization gypsum–fly ash flowable lightweight soil was proposed. The model was fitted and analyzed with the test results, and the correlation was greater than 0.96. The high degree of agreement showed that desulfurization gypsum can promote the disintegration of fly ash, thereby increasing the specific surface area. This provides more contact points, promotes the hardening process, and enhances the interlocking force between particles and the formation of cementitious substances, further enhancing strength.

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Effectiveness of Lubricants and Fly Ash Additive on Surface Damage Resistance under ASTM Standard Operating Conditions

Cited by 8 publications

References 19 publications

Investigating the Impact of Fly-Ash Additive on Viscosity Reduction at Different Temperatures: A Comparative Analysis

Investigating the Impact of Fly-Ash Additive on Viscosity Reduction at Different Temperatures: A Comparative Analysis

Application of EDEM Simulation for Calculating and Optimizing a Closed Coal Fly Ash Screw Conveyor

Study of the Design and Mechanical Properties of the Mix Proportion for Desulfurization Gypsum–Fly Ash Flowable Lightweight Soil

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