Nur Liza Rahim
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Nur Liza Rahim
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Nur Liza, Rahim
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Rahim, Nur Liza
Rahim, N. L.
Rahim, Nur Alis Addiena A.
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Scopus Author ID
55754434900

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Experimental Investigation on the Effectiveness of Truss-Shaped Punching Shear Reinforcement in Flat Slab

2022-07-18 , Shamshinar Salehuddin , Zaini S.S. , Johari M.A.M. , Nur Liza Rahim , Mustaqqim Abdul Rahim

The use of reinforced concrete flat slabs in building construction increases the floor-to-floor clearance, expedites site operations, and offers aesthetically rewarding features. However, punching shear failure in a flat slab is brittle in nature and can be potentially catastrophic. Many studies have been conducted to improve the punching shear capacity of flat slabs but some of the proposed punching shear reinforcements were complicated and costly. This research aimed to evaluate the effectiveness of a simple and cost-effective; truss-shaped punching shear reinforcement embedded in a 1200 mm × 1200 mm × 175 mm thick flat slab specimen. Three types of truss-shaped punching shear reinforcements were prepared. All specimens were supported at the edges and subjected to gravity load tests. The results showed that the introduction of truss-shaped punching shear reinforcement increased the punching shear capacity in the range of 7.71% to 21.47%. The maximum deflection of these specimens exhibited an insignificant increase compared to the control specimen, suggesting that punching failure governed the ultimate behavior. The additional strength offered by truss-shaped punching shear reinforcement makes flat slabs as a construction material more appealing because they allow them to withstand higher design loads.

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Waste to concrete material: Potential Study of Chemical Characterization of Coal Fly Ash and Bottom Ash

2023-01-01 , Nur Liza Rahim , Syakirah Afiza Mohammed , Roshazita Che Amat , Norlia Mohamad Ibrahim , Hamzah N. , Samsudin S. , Shamshinar Salehuddin , Mustaqqim Abdul Rahim , Holban E.

This research focuses on the chemical properties of coal fly ash (CFA) and coal bottom ash (CBA) obtained from Sultan Azlan Shah Power Plant and compares them with the characteristics of ordinary Portland cement (OPC). Coal has been recognised as a significant fuel source in Malaysia, where it is extensively employed in the creation of steel, cement, and power. When coal is burned to create power, several different types of coal ash are created, including fly ash, bottom ash, boiler slag, and clinker. Fly and bottom ash, however, are the main coal ash waste products that have been created. In an effort to create sustainable concrete from waste, a number of studies have been carried out to ascertain the chemical characteristics of fly and bottom ash. These tests include Energy Disperse X-Ray (EDX), Mineralogy (XRD), and X-Ray Fluorescence (XRF). From the SEM result, fly ash has smaller particles and a spherical, uniform shape than bottom ash and cement. Fly and bottom ash from the Sultan Azlan Shah power plant contain a number of elements, including Silicon (Si), Aluminium (Al), Oxygen (O), Calcium (Ca), Titanium (Ti), Iron (Fe), Magnesium (Mg), Potassium (K), Carbon (C), and Sodium, according to Energy Dispersive X-Ray (EDX) test. The fly ash is primarily an amorphous material, with the presence of quartz crystalline phase (SiO2) at 24.3% and bottom ash at 31.1%, according to X-ray Diffraction (XRD) data. For the mullite phase (3AlO3.2SiO2), fly and bottom ash show results of 24.9% and 14.5%, respectively. According to an X-ray fluorescence (XRF) investigation, the main constituents of fly and bottom ash are silica, iron, and alumina. Fly ash is classified as Class F because it has a high concentration of SiO2, Al2O3, and Fe2O3 while OPC has a high CaO value. With the right composition and material preparation, CFA and CBA from the Sultan Azlan Shah Power Plant can be used as a cement replacement in concrete.

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Investigating the effect of steel wire and carbon black from worn out tyre on the strength of concrete

2024-10 , Norlia Mohamad Ibrahim , Ali Naqiuddin Zamah Shari , Nur Zakiah Anis Abdul Rahim , Nur Liza Rahim , Mustaqqim Abdul Rahim , Roshazita Che Amat , Norshah Aizat Shuaib , György Deak

Technology in concrete is rapidly developing to improve the quality and properties of concrete. One of the many recycled materials is worn-out tyres. Currently, the use of tires is very widespread considering the use of vehicles that increase from time to time. Piles of discarded tires can cause a lot of damage to the environment. So, by using steel wire waste (SWW) as new fiber reinforcement in concrete and with the combination with carbon black (CB), it is hoped that, by doing this, not only it could improve the quality of concrete, but also preserves the environment. Therefore, the objective of this research was, to identify the properties of fresh concrete with the addition of SWW and CB, and also to investigate the physical and mechanical properties of hardened concrete, incorporating of SWW as additional fiber reinforcement and CB. For fresh concrete, workability using a slump test was conducted. Several tests were carried out on the properties of hardened concrete. Among them were compressive strength, flexural strength, splitting tensile strength, and water absorption. The physical appearance of the concrete has also been examined and recorded. There are four batches of concrete which consist of one control batch and three batches of concrete with various weights of SWW which are in the portion of 300 g, 600 g, and 900 g, and the weight of CB is maintained at 300 g for all batches. For workability, all concrete batches with the addition of SWW and CB show acceptable workability. For the case of the density of fresh concrete, samples containing 900 g addition of SWW have the highest density which was 2520 kg/m³, as expected. Results for water absorption show that the lowest value is contributed by the control sample which was 7.6%. For compressive and flexural strength, 300 g addition of SWW has the highest value which was 28.52 MPa for compressive strength and 7.52 MPa for flexural strength. Lastly, for splitting tensile strength, the highest value was also obtained when 300 g addition of SW was added which was 5.4 MPa. To conclude, SWW and CB can be added to concrete to obtain comparable strength of concrete. However, some modifications could be made to both recycle materials to improve concrete performance.

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Performance of Sugar Cane Baggage Ash (SCBA) as Partially Replacement of Cement in Concrete

2023-10-04 , Mustaqqim Abdul Rahim , Cheah S.W. , Ayob A. , Nor Faizah Bawadi , Norlia Mohamad Ibrahim , Shamilah Anudai @ Anuar , Nur Liza Rahim , Umar Kassim

Sugar cane is main food crop in tropical and subtropical countries. It is the main resource for the sugar production. Sugar cane bagasse (SCB) is a waste that produced after the juice extraction of sugarcane while sugar cane bagasse ash (SCBA) produced after the control burning of SCB. The use of waste products as partial replacement for the material in concrete can help to reduce the environmental and economic problem. Since the cost of construction materials such as cement is increasing spirally and agricultural waste such as SCBA can be obtained at low cost, it has a good potential to use in concrete as cement replacement. In this study, the workability, density, and compressive strength of the concrete been chosen to compare with the green concrete. Three different types concrete cube have been casted in this study, na1111mely; 0, 5%, 7.5%, 10% of SCBA to replace for cement. The size of the cube samples to be casted is 100 x 100 x 100 mm and cured for 7 and 28 days. The study show that the optimum percentage for SCBA concrete is 5%, it give the highest compressive strength value compare to other percentage at 28 days.

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Workability and density of concrete containing Coconut Fiber

2022-01-01 , Norlia Mohamad Ibrahim , Nur Liza Rahim , Roshazita Che Amat , Mustaqqim Abdul Rahim , Woo Chin Kah , Irnis Azura Zakaria , Moncea Andreea

Use of natural fiber in concrete to enhance the strength of concrete have been used widely and become as part of an alternative building materials. For instance, the use of coconut fiber (CF) which are non-hazardous, environmental-friendly and can improves the engineering properties of concrete. The aim of this study is to identify the workability and density of CF modified concrete. CF were added into the mixture in 3 different amount that is 200 g, 400 g, and 600 g. The size of the cube samples is 100 × 100 × 100 mm and were cured for 14 days, and 28 days. To evaluate the effect of CF in improving the properties of concrete, the properties of ordinary concrete are used as a reference which consist 0% CF. The fresh and hardened densities for all samples also show that when more fiber was added into mixture, densities reduced. As summary, the study shows that by adding CF in concrete reduced the workability and density of concrete.

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Assessment on the performance of flat slab under service load and ultimate load using ABAQUS

2020-06-10 , Shamshinar Salehuddin , Zaini S.S. , Nik Zainab Nik Azizan , Nur Liza Rahim , Norlia Mohamad Ibrahim , Mustaqqim Abdul Rahim , Asyraf Mamat Ghani

The research carried out to study on the performance of the flat slab under the design load. The design loads consist of service load, 14.68 kN/m2 and the ultimate load, 21.31 kN/m2. The justification on the design load was from the car park. The Three-Dimensional (3D) Finite Element Analysis (FEA) were conducted to investigate their failures modes with the appropriate modelling of element, mesh and concrete parameter. The size of flat slab was 1200 mm x 1200 mm x 175 mm while the material parameters were the Grade 25 for concrete and S275 for steel. It is found that the improvements more than 20% to the strength of model flat slab with shear reinforcement. Another outcome of the study indicated that the punching shear location using the FEA was less than 250 mm from column perimeter which is within the two times the depth (2d) from column face as proposed by the Eurocode 2: Design of Concrete Structures.

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Reclamation and Reutilization of Incinerator Ash in Artificial Lightweight Aggregate

2022-01-01 , Norlia Mohamad Ibrahim , Roshazita Che Amat , Mustaqqim Abdul Rahim , Nur Liza Rahim , Abdul Rahim Abdul Razak

This study focused on the reclamation of ash from incineration process and development of new artificial lightweight aggregate (LWA) that have comparable properties with existing natural coarse aggregate. The main objective of this study is to examine potential use of recycled municipal solid waste incineration (MSWI) ash as raw material in LWA production with a method of cold-bonded pelletization. Two types of incineration ash which is bottom ash (BA) and fly ash (FA) were collected from Cameron Highland Incineration Plant, Malaysia. The properties of BA and FA are studied by means of X-Ray Fluorescence (XRF) and microstructure of these ashes were inspected using Scanning Electron Microscope (SEM). The properties of BALA and FALA produced in this study is examined including loose bulk density, water absorption and aggregate impact value (AIV). From the results of both types of artificial LWA, the lowest loose bulk density of BALA is BALA50 with 564.14 kg/m3and highest is at 831.19 kg/m3. For FALA50, lowest loose bulk density is 573.64 kg/m3and highest is 703.35 kg/m3. Water absorption of BALA and FALA is quite similar with one another in with the value of 23.8% and 22.6%, respectively. Generally, FALA have better qualities of LWA comparing with BALA with lower bulk density and water absorption and can be categorized as strong aggregate. In summary, reclamation and reutilization of incinerator ash has generated acceptable qualities for artificial LWA. Both types of BA and FA shown a great potential to be recycled as additional materials in artificial aggregate production.

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Preservation of natural resources by utilizing combustion ash in concrete and determination of its engineering properties

2023-01-01 , Norlia Mohamad Ibrahim , Nur Liza Rahim , Syakirah Afiza Mohammed , Roshazita Che Amat , Mustaqqim Abdul Rahim , Zailani W.W.A. , Laslo L. , Muhamad N.

Due to the large amount of combustion ash being thrown into landfills, which can lead to environmental pollution, new alternatives to construction materials can be developed by utilising this combustion ash as a part of the main raw materials, while at the same time helping to preserve natural resources in the concrete manufacturing industry. Generally, using new waste materials will eventually affect the engineering properties of concrete. Therefore, the main objective of this study is to analyse the engineering properties of concrete containing combustion ash as a partial replacement for ordinary Portland cement (OPC). CA can be classified as combustion bottom ash (CBA) and combustion fly ash (CFA). CA is tested for its chemical compositions using X-Ray Fluorescence (XRF), and its four main compositions, which are silica, alumina, iron, and calcium, are examined and discussed extensively. Other testing for the property of CA includes Scanning Electron Microscopic (SEM) and specific gravity testing for coarse aggregate. To produce sustainable concrete from waste, several tests have been conducted to determine the engineering properties of the concrete, such as compressive strength, flexural strength, and splitting tensile strength. Results show that CA, which consists mainly of silica dioxide, contributed to the strength of concrete. SEM images show that CBA has a porous structure with an angular and rough texture, whereas CFA has more rounded particles, which influence the overall compressive strength. Furthermore, it was discovered that as the proportion of CBA utilised increased, the compressive strength, flexural strength, and splitting tensile strength of the concrete improved. Based on the results of the testing, CBA is suggested for use as a supplementary cementitious material in concrete.

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Recycling fly ash from MSWI for artificial aggregate production for concrete

2020-12-29 , Norlia Mohamad Ibrahim , Khairul Nizar Ismail , Roshazita Che Amat , Nur Liza Rahim , Mustaqqim Abdul Rahim

This study focusses on the development of new lightweight aggregate (LWA) that eventually will have comparable properties with existing natural aggregate which is granite. The main objectives of this study is to examine potential use of recycled municipal solid waste incineration (MSWI) ash as raw material in LWA production with a method of cold-bonded palletization process. The ashes are collected from Cameron Highland Incineration Plant, Malaysia that can be divided into bottom ash (BA) and fly ash (FA). This study uses FA as partial raw material to substitute the Ordinary Portland Cement (OPC). The properties FA are studied by means of X-Ray Fluorescence (XRF). The LWA is fly ash lightweight aggregate (FALA). The production of LWA is based on cold-bonded palletization technique. FALA have experienced two different curing process for 28 days namely room-room (RR) and room-water (RW) curing conditions. The percentage of FA used in this study is 10%, 20%, 30%, 40% and 50% of cement replacement and the size is fixed between 10 mm to 20 mm with circular shape. The properties of FALA produced in this study is examined including loose bulk density, and aggregate impact value (AIV). Other physical properties including colour and texture are also being investigated. From the results of LWA it is clearly seen that 20% FA were the best percentage of ash used to produce good quality LWA. Loose bulk density of FALA selected is 716.72 kg/m3 and AIV 13.80%.

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Reclamation and reutilization of incinerator Ash in artificial lightweight aggregate

2022-01-01 , Norlia Mohamad Ibrahim , Roshazita Che Amat , Mustaqqim Abdul Rahim , Nur Liza Rahim , Razak A.R.A.

This study focused on the reclamation of ash from incineration process and development of new artificial lightweight aggregate (LWA) that have comparable properties with existing natural coarse aggregate. The main objective of this study is to examine potential use of recycled municipal solid waste incineration (MSWI) ash as raw material in LWA production with a method of cold-bonded pelletization. Two types of incineration ash which is bottom ash (BA) and fly ash (FA) were collected from Cameron Highland Incineration Plant, Malaysia. The properties of BA and FA are studied by means of X-Ray Fluorescence (XRF) and microstructure of these ashes were inspected using Scanning Electron Microscope (SEM). The properties of BALA and FALA produced in this study is examined including loose bulk density, water absorption and aggregate impact value (AIV). From the results of both types of artificial LWA, the lowest loose bulk density of BALA is BALA50 with 564.14 kg/m3and highest is at 831.19 kg/m3. For FALA50, lowest loose bulk density is 573.64 kg/m3and highest is 703.35 kg/m3. Water absorption of BALA and FALA is quite similar with one another in with the value of 23.8% and 22.6%, respectively. Generally, FALA have better qualities of LWA comparing with BALA with lower bulk density and water absorption and can be categorized as strong aggregate. In summary, reclamation and reutilization of incinerator ash has generated acceptable qualities for artificial LWA. Both types of BA and FA shown a great potential to be recycled as additional materials in artificial aggregate production.

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