Muhammad Faheem Mohd. Tahir
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Preferred name
Muhammad Faheem Mohd. Tahir
Official Name
Muhammad Faheem, Mohd. Tahir
Alternative Name
Muhammad Faheem, T. M.
Tahir, Faheem
Faheem, Mohd Tahir Muhammad
Tahir, Muhammad Faheem
Tahir, Muhammad Faheem Mohd
Tahir, M. F.M.
Main Affiliation
Scopus Author ID
57211574727
Researcher ID
AAT-9691-2021
DWS-8186-2022
IHM-2046-2023

Research Output
Now showing 1 - 3 of 3
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Publication

Characterisation at the bonding zone between fly ash based Geopolymer Repair Materials (GRM) and Ordinary Portland Cement Concrete (OPCC)

2020 , Warid Wazien Ahmad Zailani , Mohd. Mustafa Al Bakri Abdullah , Mohd Fadzil Arshad , Rafiza Abd Razak , Muhammad Faheem Mohd. Tahir , Remy Rozainy Mohd Arif Zainol , Marcin Nabialek , Andrei Victor Sandu , Jerzy J. Wysłocki , Katarzyna Błoch

In recent years, research and development of geopolymers has gained significant interest in the fields of repairs and restoration. This paper investigates the application of a geopolymer as a repair material by implementation of high-calcium fly ash (FA) as a main precursor, activated by a sodium hydroxide and sodium silicate solution. Three methods of concrete substrate surface preparation were cast and patched: as-cast against ordinary Portland cement concrete (OPCC), with drilled holes, wire-brushed, and left as-cast against the OPCC grade 30. This study indicated that FA-based geopolymer repair materials (GRMs) possessed very high bonding strength at early stages and that the behavior was not affected significantly by high surface treatment roughness. In addition, the investigations using scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) spectroscopy have revealed that the geopolymer repair material became chemically bonded to the OPC concrete substrate, due to the formation of a C–A–S–H gel. Fundamentally, the geopolymer network is composed of tetrahedral anions (SiO4)4− and (AlO4)5− sharing the oxygen, which requires positive ions such as Na+, K+, Li+, Ca2+, Na+, Ba2+, NH4+, and H3O+. The availability of calcium hydroxide (Ca(OH)2) at the surface of the OPCC substrate, which was rich in calcium ions (Ca2+), reacted with the geopolymer; this compensated the electron vacancies of the framework cavities at the bonding zone between the GRM and the OPCC substrate.

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Potential of new sustainable Green Geopolymer Metal Composite (GGMC) material as mould insert for Rapid Tooling (RT) in injection moulding process

2023 , Allice Tan Mun Yin , Shayfull Zamree Abd. Rahim , Mohd. Mustafa Al Bakri Abdullah , Marcin Nabialek , Abdellah El-hadj Abdellah , Allan Rennie , Aurel Mihail Titu , Muhammad Faheem Mohd. Tahir

The investigation of mould inserts in the injection moulding process using metal epoxy composite (MEC) with pure metal filler particles is gaining popularity among researchers. Therefore, to attain zero emissions, the idea of recycling metal waste from industries and workshops must be investigated (waste free) because metal recycling conserves natural resources while requiring less energy to manufacture new products than virgin raw materials would. The utilisation of metal scrap for rapid tooling (RT) in the injection moulding industry is a fascinating and potentially viable approach. On the other hand, epoxy that can endure high temperatures (>220 °C) is challenging to find and expensive. Meanwhile, industrial scrap from coal-fired power plants can be a precursor to creating geopolymer materials with desired physical and mechanical qualities for RT applications. One intriguing attribute of geopolymer is its ability to endure temperatures up to 1000 °C. Nonetheless, geopolymer has a higher compressive strength of 60–80 MPa (8700–11,600 psi) than epoxy (68.95 MPa) (10,000 psi). Aside from its low cost, geopolymer offers superior resilience to harsh environments and high compressive and flexural strength. This research aims to investigate the possibility of generating a new sustainable material by integrating several types of metals in green geopolymer metal composite (GGMC) mould inserts for RT in the injection moulding process. It is necessary to examine and investigate the optimal formulation of GGMC as mould inserts for RT in the injection moulding process. With less expensive and more ecologically friendly components, the GGMC is expected to be a superior choice as a mould insert for RT. This research substantially impacts environmental preservation, cost reduction, and maintaining and sustaining the metal waste management system. As a result of the lower cost of recycled metals, sectors such as mould-making and machining will profit the most.

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Optimizing of the cementitious composite matrix by addition of steel wool fibers (Chopped) based on physical and mechanical analysis

2021 , Akrm A Rmdan Amer , Mohd. Mustafa Al Bakri Abdullah , Liew Yun Ming , Jerzy J. Wysłocki , Wojciech Sochacki , Ikmal Hakem A Aziz , Muhammad Faheem Mohd. Tahir , Sebastian Garus , Joanna Gondro , Hetham A. R. Amer

The demand for durable, resistant, and high-strength structural material has led to the use of fibers as reinforcing elements. This paper presents an investigation into the inclusion of chopped steel wool fibers (CSWFs) in cement to form a high-flexural strength cementitious composite matrix (CCM). CSWFs were used as the primary reinforcement in CCM at increments of 0.5 wt%, from 0.5–6 wt%, with ratios of cement to sand of 1:1.5 and water to cement of 0.45. The inclusion of CSWFs resulted in an excellent optimization of the physicomechanical properties of the CCM, such as its density (2.302 g/cm3), compressive strength (61.452 MPa), and maximum flexural strength (10.64 MPa), all of which exceeded the performances of other reinforcement elements reported in the literature.

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