Muhd Afiq Hizami Abdullah
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Preferred name
Muhd Afiq Hizami Abdullah
Official Name
Muhd Afiq Hizami, Abdullah
Alternative Name
Abdullah, Muhd Afiq Hizami
Hizami Abdullah, Muhd Afiq
Abdullah, M. A.H.
Main Affiliation
Scopus Author ID
57206254418
Researcher ID
EJY-0602-2022

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  • Publication
    Performance of sequencing batch reactor for the removal of chemical oxygen demand from waste cooking oil
    ( 2022-06-01)
    Abdul Rashid N.B.
    ;
    Abdul Latif Abdul Rani
    ;
    Mardhiah Farhana Omar
    ;
    Muhd Afiq Hizami Abdullah
    ;
    Permana Putri E.B.
    ;
    Syafiuddin A.
    The production of highly polluted waste cooking oil (WCO) that contains both inorganic and organic compounds has been increased in Malaysia particularly in food industries. This study was aimed to utilize a sequencing batch reactor (SBR) in order to investigate the aerobic treatment of WCO. The system was operated at pH ranging from 4 to 5 and temperature ranged from 25°C to 31°C. The SBR reactor was fabricated using Perspex with a working volume of 2 L. Experiments were con-ducted daily at fill, react, settle, draw, and idle phase at 1, 1, 2, 1, and 1 h, respectively. The chemical oxygen demand (COD) and turbidity were assessed in determining SBR performance. Highest COD removal and turbidity values were at 67% and 0.94 NTU, respectively. A stable effluent quality was achieved after 13 d of operational investigation. In general, the SBR treatment was able to achieve acceptable discharge limit for the final treated effluent.
  • Publication
    Partially Replacement of Cement by Sawdust and Fly Ash in Lightweight Foam Concrete
    ( 2020-03-18)
    Mohd Firdaus Omar
    ;
    Muhd Afiq Hizami Abdullah
    ;
    Rashid N.A.
    ;
    Abdul Latif Abdul Rani
    The rapid growth of population has led to increased demand for fast, affordable and quality housing development. Today, the construction industry in Malaysia has shifted from conventional methods to Industrial Building Systems (IBS). The most commonly used IBS component is precasat concrete with lightweight foam concrete. This study focuses on the main component of foam lighweight concrete, which is a partially replacement of cement by sawdust and fly ash. Among the features of lightweight concrete is density below 1800 kg/m3. Therefore, the objectives of this study is to determine the effects of sawdust and fly ash as part of cement replacement in terms of mechanical properties (compressive strenght) and physical properties (water absorption). In addition, this study also determine the optimum percentage of cement replacement by sawdust and fly ash in building material. The percentage of saw dust and fly ash used in this study as a partial replacement cement are 5%, 10%, 15% and 20%. The results show that increasing the percentage of mix propotion will increase the water absorption rate as well as decrease the compressive strenght of strength. Also, the density and compressive strength of lightweight foam concrete will decrease as the percentage of partial replacement cement increases. According to JKR Standard Specification for Building Works that referred in Malaysia, the minimum compression strength of lightweight foam concrete allowed for hollow blocks is 2.8 N/mm2. The results obtained from this study show lightweight concrete blocks using saw dust and fly ash as part of the cement replacement meet the standards and can be commercialized in the industrial building system development.
  • Publication
    Competitiveness of Industrialised Building System (IBS) and Conventional Method in Construction Industry in Terms of Quality
    ( 2023-10-04)
    Mardhiah Farhana Omar
    ;
    Muhd Afiq Hizami Abdullah
    ;
    Najihah Abdul Rashid
    ;
    Fatt H.L.
    ;
    Abdul Latif Abdul Rani
    ;
    Ishak H.
    Construction quality is defined as the achievement of a satisfactory level of performance in construction work. One of the variables considered in the management of construction projects is quality. The quality of the building can be determined by its performance and compliance with all applicable requirements. However, the construction sector is facing difficulties because the quality of several projects has fallen short of expectations. As a result, the problem of lack of attention to construction quality must be addressed. Therefore, the objective of this study is to identify the elements that affect construction quality in the construction sector when IBS are used compared to conventional techniques, as well as to evaluate the success of construction with IBS compared to conventional methods in terms of quality. The final objective is to evaluate the link between the elements affecting the building quality in the Industrial Building System (IBS) and the conventional technology, as well as the quality success of the building. In this study, the quantitative analysis was conducted through questionnaire surveys that included the G7 construction companies in Selangor interested in building quality. Stratified random sampling approach was used in this study. QLASSIC was conducted by 130 Class 7 contractors from Selangor registered with the CIDB. This means that 97 people from the population are needed to complete the questionnaires. The results suggest that the most important elements affecting construction quality are that the construction of IBS components is not affected by extreme weather conditions because the prefabricated components are manufactured in a controlled environment, unlike the traditional technique. In addition, unlike traditional methods, IBS requires the use of professional personnel to install the structural components. As a result, the quality of a building can increases and defects can be reduced if it is successful. The importance of this study is that it will help contractors improve their quality on certain jobs and reduce unsatisfactory results in the future.
  • Publication
    Aerobic granules cultivated using industrial rubber wastewater: Effect of size distribution and Performance of granules.
    ( 2020-12-18)
    Najihah Abdul Rashid
    ;
    Abdul Latif Abdul Rani
    ;
    Mardhiah Farhana Omar
    ;
    Muhd Afiq Hizami Abdullah
    Sequential batch reactors (SBR) have been successfully developed granular sludge using industrial rubber wastewater on a cylindrical shaped SBR. SBR was introduced to industrial wastewater with varying chemical oxygen demand (COD) loadings from as low as 0.01 to 0.28 kgCOD/m3/d. First phase of experiment utilized 24 hours cycle time whilst second phase of experiment utilized 4 hours cycle time. Granules were successfully developed at the second phase (4 hours) of experiment. Fortunately, the overall performance for both cycles were excellent. COD removal efficiency throughout the experiment was kept at about 78 % to 98 %. Although higher COD removal was observed for both cycle, granulation did not occur in the first phase (24 hours). Decrement of cycling time to 4 hours promotes the growth of dense and structured sludge granules.
      4  19
  • Publication
    Studies on factors affecting unconfined compressive strength of industrial rubber sludge containing heavy metals treated using ordinary Portland cement via stabilization/solidification technique
    ( 2020-12-18)
    Abdul Latif Abdul Rani
    ;
    Najihah Abdul Rashid
    ;
    Muhd Afiq Hizami Abdullah
    ;
    Mohd Firdaus Omar
    ;
    Salim A.S.
    ;
    Anuar N.A.I.
    High concentration of selected heavy metals within industrial rubber sludge collected from rubber industry wastewater treatment plant has classified the waste as scheduled waste. Special treatment to the waste by using ordinary Portland cement via solidification/stabilization (S/S) technique has been performed in laboratory scale. The objective of this research is to determine related factors that affect unconfined compressive strength (UCS) performance of stabilised/solidified (s/s) cube specimens which contains industrial rubber sludge waste. Other parameters observed include the curing condition (i.e. air and water immersion curing method), waste composition, specimen age and density. The prepared fresh mix were cast in plastic moulds in order to produce 50 mm3 cubical shape specimens and leaved to set approximately 24 to 48 hours. The prepared specimen batches are S1 (90% OPC + 10% waste), S2 (70% OPC + 30% waste), S3 (50% OPC + 50% waste). UCS was performed on respective specimen age of 7 and 28 days. Positive results were obtained as relatively the average compressive strength of 7 day air cured specimens reach 5.25 MPa, 5.28 MPa, and 2.16 MPa for S1, S2 and S3.While, 28 days air cured specimens results are 9.59 MPa, 8.01 MPa, and 1.46 MPa for S1, S2, and S3 respectively. As for water immersion, the compressive strengths are 8.19 MPa, 4.93 MPa, and 1.90 MPa for 7 days, and 7.75 MPa, 10.10 MPa, and 2.11 MPa for 28 days at respective S1, S2 and S3 sequence. As conclusion, the specimens prepared passed the minimum requirement for secured landfill disposal which is at 1 MPa.
      3  24
  • Publication
    Microbiological removal of hydrogen sulphide from natural rubber latex processing wastewater by Acidithiobacillus thiooxidans strain UniMAP-AIN01
    (IOP Publishing, 2020)
    Sandrasekaran Naresh
    ;
    Nurul Ain Harmiza Abdullah
    ;
    Nor Helya Iman Kamaludin
    ;
    Muhd Afiq Hizami Abdullah
    ;
    Mohamad Fahrurrazi Tompang
    Acidithiobacillus thiooxidans is an acidophilic chemoautotrophic bacterium which capable to convert the toxic hydrogen sulphide in wastewater into non-toxic compounds. The Acidithiobacillus thiooxidans strain UniMAP-AIN01 was previously isolated from a local natural rubber latex processing mill. In this study, the A. thiooxidans strain UniMAP-AIN01 was subjected to its growth performance evaluation in the wastewater of natural rubber latex. The sulphur content in the wastewater was utilized as energy source and support their growth. It was discovered that the A. thiooxidans strain UniMAP-AIN01 has long doubling time of 2 days in thiosulphate medium, while log phase lasted until 6th day of incubation. Regression analysis of the growth kinetic was established with the aid of POLYMATH software. The precision value obtained as follows; linear regression, R2 of 0.9811, adjusted linear regression, Adj R2 of 0.9764, root mean square deviation, RMSD of 0.0015, and variance of 1.992 × 10-5 indicate the data is highly correlated and error is insignificant. Assessment on hydrogen sulphide removal efficiency using locally isolated A. thiooxidans strain UniMAP-AIN01 revealed 90% of hydrogen sulphide removal was achieved within a week.
      3  1
  • Publication
    Study of albumen as foaming agent for use in self-healing high strength concrete
    (AIP Publishing, 2023)
    Zuhairiah Zainal Zainal Abidin
    ;
    Muhd Afiq Hizami Abdullah
    ;
    Kunasundari Balakrishnan
    ;
    Muhammad Munsif Ahmad
    ;
    Nurul Ain Harmiza Abdullah
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Q. A. Musa
    Self-healing is an effective solution for sustainable maintenance for concrete to increase its durability against to sensitivity of cracking. As recently, the method of introducing bacterial agent in concrete were modified because of harsh environment in concrete such as small size of pore which cause squeezing of bacteria. In this research, the albumen from egg was used as foaming agent to create voids in concrete matrix. The aerated concrete matrix offer voids to bacteria as concrete will become dense and bacteria would squeezed during hydration process. The effect of albumen as foaming agent in concrete was studied while achieving the high strength aerated concrete type towards its compressive strength, splitting tensile strength and study the voids dissolution (visual) in concrete matrix when incorporation of albumen as foaming agent. The albumen of 2%, 4% and 6% is used as foaming agent (FA) to produce the high strength aerated concrete (HSAC). After 28 days of curing, the compressive and splitting tensile strength of HSAC reduced with the increased of albumen used in concrete. The highest compressive and splitting tensile strength of HSAC were 95.40 MPa and 6.67% respectively with 2% FA in comparison to control. The results of water absorption of HSAC also decreased when higher concentration of albumen used. The sizes of voids created in all samples were less than 15 mm. It can deduced that 2% of foaming agent was ideal to produce optimum characteristics in strength, uniform and size of voids in high strength aerated concrete.
  • Publication
    The Application of Coconut Fiber as Insulation Ceiling Board in Building Construction
    ( 2020-07-09)
    Mohd Firdaus Omar
    ;
    Muhd Afiq Hizami Abdullah
    ;
    Rashid N.A.
    ;
    Abdul Latif Abdul Rani
    ;
    Illias N.A.
    This study considers the applications of natural fiber composites in affordable housing projects located in Malaysia with the goal of addressing issues of the thermal comfort. Roof thermal insulation is one of the effective methods that can save cooling energy in places with an equatorial climate especially in Malaysia. The use of recycled products or industrial waste materials is now a potential trend in the industry. Therefore, natural fiber was chosen as a material for the ceiling board in this study. During the day, heat can enter the room from the roof so that insulation material is needed to reduce heat flux by maintaining the temperature of the building. The problems faced by consumers are cost increases due to the use of large amounts of electricity. Besides, asbestos use becoming less frequent because the government has banned its use as a ceiling, side panels, roofing material, asbestos cement-pipes, many types of fireproof and insulation material. The objectives of this study was to determine the mechanical and physical properties of coconut fiber with fire retardant paint as a thermal comfort for ceiling board. The next objective is to study the percentage difference in sodium hydroxide and sodium chloride during the treatment of coconut fiber. The data result is that the fiber is ideal as an insulating material for the house ceiling board because it has a low temperature quality of 0.225W. The water absorption value was as high as 11.20% which is slightly lower than previous studies. Finally, the density test has a value of 74.23 kg / m3 where the fibers are lighter than the other fibers even after immersion with different sodium hydroxide and sodium chloride. In addition, this study achieved a house ceiling that could help reduce the heat entering the house by 0.225W which used only a thickness of 10mm. The use of these fibers does not need the thickness between 20 mm or 40 mm. Therefore, it successfully lowered home electricity consumption in hot weather. It was found that the difference in temperature drop between 0 % and 3 % was 0.4W.
      26  5
  • Publication
    New High Strength Water Retaining Interlocking Pavers Block for High Mechanical Performing Pavement and Reducing Runoff
    ( 2020-03-18)
    Muhd Afiq Hizami Abdullah
    ;
    Rashid N.A.
    ;
    Abdul Latif Abdul Rani
    ;
    Mohd Firdaus Omar
    Interlocking paver blocks are used widely at low speed traffics road especially surrounding building complexes. Interlocking paver blocks are easy to install and provide aesthetic finishing to the landscape. However, usage of interlocking blocks in large areas reduce ground permeability that lead to higher runoff. New interlocking paver blocks were investigated to reduce runoff and the effect on its mechanical performance. Two types of paver block produced which is paver block with permeable concrete and paver block with void in the center. The results show that the compressive strength for paver block with permeable concrete is averagely higher than paver block with void by 31.5% while the flexural strength of all samples were between 1.0 to 1.7 MPa. Paver block with void recorded highest reduction of runoff compared to paver block with permeable concrete which is 25.5%. This is in line with water infiltration test result. It was concluded that the water retaining performance of paver block increase with increment of void volume and increase in void volume caused reduction on compressive strength of interlocking blocks.
      1  22
  • Publication
    Effect of Using Soap Nut as Natural Foaming Agent on Mechanical Properties and Pore Distribution of High Strength Aerated Concrete
    ( 2020-07-09)
    Muhd Afiq Hizami Abdullah
    ;
    Rashid N.A.
    ;
    Abdul Rani A.L.
    ;
    Mohd Firdaus Omar
    ;
    Tan Chan Sin
    Aerated concrete is a type of concrete that contains pore in its matrix structure. This pores could provide spaces for water absorption which makes aerated concrete more durable toward freeze-thaw cycle. Many methods have been studied in forming an aerated concrete and using soap nut as aerating agent is more sustainable than other chemically formulated agent. Forming of pore inside concrete not only improve freeze-thaw cycle durability but also as places to store healing agent in concrete. This is important in developing a self-healing concrete especially a microbial induced healing. This paper aims to study the effect of using soap nut in high strength concrete. Four types of high strength concrete samples were prepared which are Control sample, AE2 with 2% of aerated soap nut, AE4 with 4% of aerated soap nut and AE6 with 6% of aerated soap nut. Total of 3nos. of 100mm cubes and 3nos. of 50mm cubes from each type of samples were prepared. Cubes samples of 100mm dimension were tested for water absorption and compressive strength while cube samples of 50mm dimension were split and analysed for pore distribution. The results showed that increase in addition of soap nut in concrete mixture resulted in decrease of compressive strength but minimal effect on its water absorption rate. Pore formation and dispersion were optimum in concrete with 4% and 6% inclusion of soap nut. In conclusion, 4% of aerated soap nut in high strength concrete present the optimum characteristic in producing well-dispersed pores of high strength aerated concrete.
      2  18