Optimisation of EMI shielding effectiveness: Mechanical and physical performance of mortar containing POFA for plaster work using Taguchi Grey method

Narong, O. L. C.; Kiong, Sia Chee; Yee, See Khee; Ong, Pauline; Zainudin, Azlan; Nor, Nik Hisyamudin Muhd; Hassan, Mohd Fahrul

doi:10.1016/j.conbuildmat.2018.05.025

Cited by 18 publications

(5 citation statements)

References 35 publications

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“…where δ ij X−Y and δ ij X−Z are the gray relational coefficient, and ξ is the identification coefficient that varies between 0 and 1, and it is generally chosen as 0.5 [35,42,67].…”

Section: Sensitivity Analysis 61 Gray Methodsmentioning

confidence: 99%

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

Rhouma,

Maazoun,

Aminou

et al. 2024

Buildings

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Reinforced concrete (RC) columns, being axial-bearing components in buildings, are susceptible to damage and failure when subjected to blast loading. The failure of these columns can trigger a progressive collapse in targeted buildings. The primary objective of this study is to investigate the failure characteristics of laboratory-scale RC columns subjected to localized blast loading. The columns, with a length of 1500 mm and an outer diameter of 100 mm, are reinforced with 6 mm diameter longitudinal bars and 2 mm diameter steel ties. The blast loading is generated using an explosive-driven shock tube (EDST) positioned in front of the mid-span of the RC columns with a 30 g and 50 g charge. To capture the global response of the RC columns, high-speed stereoscopic DIC is used in addition to LVDTs. Furthermore, an FE model is developed using LS-DYNA R10.0 and validated against the experimental data. The results show that the proposed FE approach is able to reproduce the applied blast loading and the failure characteristics of the columns. The relative difference in column mid-span out-of-plane displacement between the FE model and the average measured data lies below 5%. Finally, the gray correlation method is conducted to assess the influence of various parameters on the blast resistance of the RC columns.

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“…where δ ij X−Y and δ ij X−Z are the gray relational coefficient, and ξ is the identification coefficient that varies between 0 and 1, and it is generally chosen as 0.5 [35,42,67].…”

Section: Sensitivity Analysis 61 Gray Methodsmentioning

confidence: 99%

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

Rhouma,

Maazoun,

Aminou

et al. 2024

Buildings

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“…for ''larger-the-better'' criteria [45]; where Z ij is the normalized S/N ratio of i th experiment for j th response [44], [46], [47]. Note that max Y ij = min Y ij suggests the output variable (response) is insensitive to any input variable (controllable factor).…”

Section: B Optimal Production Parameter Design Using Grey Taguchi Met...mentioning

confidence: 99%

An Improved Value Stream Mapping to Prioritize Lean Optimization Scenarios Using Simulation and Multiple-Attribute Decision-Making Method

Liu

Yang

2020

IEEE Access

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Manufacturing organizations have been witnessing transformation in business strategy from mass production to lean philosophy. Value Stream Mapping (VSM) is one of the primary analytical tools for identifying waste and transforming the production environment into lean operational state. However, traditional VSM lacks the capability to handle conflicting factors in the improvement scheme and to prioritize multiple improvement initiatives. VSM enables only a static analysis of a system, and a static model does not allow assessing how the system will be affected to various scenarios with different parameters in the futurestate map. Moreover, VSM optimization is a typical multiple-attribute decision-making (MADM) problem that involves the evaluation of multiple performance metrics such as inventory levels, lead times and service levels. Therefore, this paper proposes an improved VSM procedure that incorporates simulation and MADM, using grey Taguchi method, to overcome the limitation of standard VSM. Simulation introduces a dynamic dimension to VSM, and grey Taguchi method prioritizes the scenarios with a minimum number of test series. A lean implementation program is conducted in a footwear manufacturing company to validate the improved VSM procedure. Two alternative future-state VSMs are proposed, each with nine different scenarios, and the identified optimal solution realizes the reduction in defect rate, work-in-process inventory and lead time, as well as the improvement in order fulfilment rate. The improved VSM procedure enables practitioners to determine the optimal future-state VSM according to the preference of practitioners on multiple performance criteria.

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“…Palm Oil Fuel Ash (POFA) has been studied as a cement replacement, filler, and additive in lightweight structures, soil stabilization, and road sub-base [1][2][3][4]. POFA has also been used to develop nanoparticles and zeolites for different applications, such as mortar, plaster, geopolymers, and blended cement concrete [5][6][7][8][9]. Incorporating POFA into construction materials involves using silica from POFA as a part of the pozzolanic reaction with cement paste to improve the characteristics of mortar and concrete [10].…”

Section: Introductionmentioning

confidence: 99%

Compressive strength, porosity, and density of mortar containing precipitated silica from Palm Oil Fuel Ash (POFA)

Olivia

Wibisono

Utama

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Palm Oil Fuel Ash (POFA) as an agro-industrial waste has potential applications in the construction industry. Using POFA to produce extracted precipitated silica is another step toward improving the performance of mortar and concrete with cost-effective biomass waste. This study investigates precipitated silica extracted from POFA as an additive for mortar. Mortar mixtures containing various percentages of precipitated silica (PS) and silica fume (SF) with 2%, 4%, and 6% by weight of cement were cast and studied. Compressive strength, porosity and density of the mortar at 28 days were tested to study the physical properties of the PCC-SP and PCC-SF mortars. The compressive strength of PCC-PS and PCC-SF mortars increased with the optimum 4% addition of silica. Precipitated silica mortar (PCC-PS) has lower strength, higher porosity, and similar density to the silica fume mortar (PCC-SF). However, the precipitated silica mortar has better strength, porosity, and density than the PCC mortar (control mix). The current findings suggest that the extracted precipitated silica can be used as a cost-effective additive from biomass waste to improve the performance of mortar and concrete.

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Optimisation of EMI shielding effectiveness: Mechanical and physical performance of mortar containing POFA for plaster work using Taguchi Grey method

Cited by 18 publications

References 35 publications

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

Blast Loading of Small-Scale Circular RC Columns Using an Explosive-Driven Shock Tube

An Improved Value Stream Mapping to Prioritize Lean Optimization Scenarios Using Simulation and Multiple-Attribute Decision-Making Method

Compressive strength, porosity, and density of mortar containing precipitated silica from Palm Oil Fuel Ash (POFA)

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