WAN MASTURA BINTI WAN IBRAHIM
@unimap.edu.my/index.php
SENIOR LECTURER FACULTY OF MECHANICAL ENGINEERING & TECHNOLOGY
UNIVERSITI MALAYSIA PERLIS
Dr Wan Mastura Wan Ibrahim is a research fellow at the Centre of Excellence Geopolymer & Green Technology (CEGeoGTech), University of Malaysia Perlis (UniMAP). She is also a Senior Lecturer at the Faculty of Mechanical Engineering Technology, UniMAP. She obtained her BSc. (Industrial Chemistry) from Universiti Teknologi Malaysia (UTM), MSc (Materials Engineering) from Universiti Malaysia Perlis (UniMAP) and PhD in Materials Engineering from UniMAP. Her research interests include geopolymer, material engineering, green technology, wastewater treatment, and construction material. She has involved with 3 patent filing and was awarded over 30 medal awards in the international exhibition. In addition, she has published 40 papers including high-impact journal papers, conference and proceeding papers, book chapters, and as main author and co-author.
EDUCATION
• Doctor of Philosophy ( in Materials Engineering
Universiti Malaysia Perlis, (UniMAP), Perlis, Malaysia (2018)
• Master’s of Science (Material Engineering)
Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia (2013)
• Bachelor’s Degree of Science (Industrial Chemistry)
University Teknologi Malaysia (UTM), Johor Darul Takzim, Malaysia (2010)
RESEARCH, TEACHING, or OTHER INTERESTS
Water Science and Technology, Materials Science, Building and Construction, Ceramics and Composites
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Masdiyana Ibrahim, Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Marcin Nabialek, Ramadhansyah Putra Jaya, Monthian Setkit, Romisuhani Ahmad, and Bartłomiej Jeż
MDPI AG
Water contamination is a major issue due to industrial releases of hazardous heavy metals. Copper ions are among the most dangerous heavy metals owing to their carcinogenicity and harmful effects on the environment and human health. Adsorption of copper ions using alkali activated materials synthesized through the polycondensation reaction of an alkali source and aluminosilicates is the most promising technique, and has a high adsorption capability owing to a large surface area and pore volume. This research focuses on the effect of the alkaline activator ratio, which is a sodium silicate to sodium hydroxide ratio. Various exposing temperatures on metakaolin based alkali activated materials on a surface structure with excellent functional properties can be used as adsorbent materials for the removal of copper ions. A variety of mix designs were created with varying sodium silicate to sodium hydroxide ratios, with a fixed sodium hydroxide molarity, metakaolin to alkali activator ratio, hydrogen peroxide, and surfactant content of 10 M, 0.8, 1.00 wt%, and 3.0 wt%, respectively. Most wastewater adsorbents need high sintering temperatures, requiring an energy-intensive and time-consuming manufacturing process. In this way, metakaolin-based alkali activated materials are adsorbent and may be produced easily by solidifying the sample at 60 °C without using much energy. The specific surface area, water absorption, microstructure, phase analysis, functional group analysis, and adsorption capability of copper ions by metakaolin based alkali activated materials as adsorbents were evaluated. The water absorption test on the samples revealed that the sodium silicate to sodium hydroxide 0.5 ratio had the highest water absorption percentage of 36.24%, superior pore size distribution, and homogeneous porosity at 60 °C, with a surface area of 24.6076 m2/g and the highest copper ion uptake of 63.726 mg/g with 95.59% copper ion removal efficiency at adsorption condition of pH = 5, a dosage of 0.15 g, 100 mg/L of the initial copper solution, the temperature of 25 °C, and contact time of 60 min. It is concluded that self-supported metakaolin based alkali activated material adsorbents synthesized at low temperatures effectively remove copper ions in aqueous solutions, making them an excellent alternative for wastewater treatment applications.
Fatin Farhana Kamarzamann, Mohd Mustafa Al Bakri Abdullah, Shayfull Zamree Abd Rahim, Aeslina Abdul Kadir, Noorina Hidayu Jamil, Wan Mastura Wan Ibrahim, and Andrei Victor Sandu
Elsevier BV
Romisuhani Ahmad, Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Phakkhananan Pakawanit, Petrica Vizureanu, Arman Shah Abdullah, Andrei Victor Sandu, and Fakhryna Hannanee Ahmad Zaidi
MDPI AG
The focus of this study is the fabrication of innovative and sustainable ceramic-based geopolymer with improved low temperatures performances. Kaolin was mixed with liquid sodium silicate (Na2SiO3) and 12M of sodium hydroxide (NaOH) solution using alkali activator ratio of 0.24 and solid-to-liquid ratio of 1:1 to synthesize kaolin geopolymer. The effect of the sintering profile on the microstructure, pore evolution and flexural strength were investigated. The heating exposure aided consolidation and created a fairly uniform microstructure, resulting in a smooth surface texture. In comparison to the unheated geopolymer, 3D pore distribution showed a significant increase in the range size of ~30 µm with the appearance of isolated and intergranular pores. The flexural strength at 1200 °C with a heating rate of 5 °C/min and was increased by 146.4% to 85.4 MPa, as compared to the heating rate of 2 °C/min. The sintering process has an impact on the final microstructure formation thus improving the characteristic of geopolymer-based nepheline ceramic.
Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Romisuhani Ahmad, Andrei Victor Sandu, Petrica Vizureanu, Omrane Benjeddou, Afikah Rahim, Masdiyana Ibrahim, and Ahmad Syauqi Sauffi
MDPI AG
Geopolymers are an inorganic material in an alkaline environment that is synthesized with alumina–silica gel. The structure of geopolymers consists of an inorganic chain of material and a covalent-bound molecular system. Currently, Ordinary Portland Cement (OPC) has caused carbon dioxide (CO2) emissions which causes greenhouse effects. This analysis investigates the impact on fly ash/dolomite-based-geopolymer with various molarities of sodium hydroxide solutions which are 6 M, 8 M, 10 M, 12 M and 14 M. The samples of fly ash/dolomite-based-geopolymer were prepared with the usage of solid to liquid of 2.0, by mass and alkaline activator ratio of 2.5, by mass. After that, the geopolymer was cast in 50 × 50 × 50 mm molds before testing after 7 days of curing. The samples were tested on compressive strength, density, water absorption, morphology, elemental distributions and phase analysis. From the results, the usage of 8 M of NaOH gave the optimum properties for the fly ash/dolomite-based geopolymer. The elemental distribution analysis exposes the Al, Si, Ca, Fe and Mg chemical distribution of the samples from the selected area. The distribution of the elements is related to the compressive strength and compared with the chemical composition of the fly ash and dolomite.
N. S. Sulaiman, W. R. Kadir, M. Mohamed, S. F. M. Ramle and W. Rahman
Polish Academy of Sciences Chancellery
Water contamination that caused by heavy metals is a very common phenomenon in the industrial age. one of the popular way to treat metal contaminated water is by adsorption process using activated carbon as the adsorbent. This paper works on producing activated carbon by chemical means with impregnation ratios of NaoH:char (w/w) was predetermined at 1:1 (aCT1-1), 2:1 (aCT2-1) and 3:1 (aCT3-1) under activation temperature of 700°C. Considering the Leucaena leucocephala is a wildly, easy and fast grown species, with the availability throught the year, it was chosen to be used as the precursor. The properties of these activated carbons and its potential for cadmium removal from aqueus solution was analyzed. It was found that the highest surface area was recorded at 662.76 m²/g. Four parameters were studied which are contact time, the effect of pH, initial concentration of adsorbate and temperature. The equilibrium time was achieved in 40 min treatment at initial concentrations of 30 mg/l. The adsorbent exhibited good sorption potential for cadmium at pH 8.0 and equilibrium temperature of 30℃. Based on the results, this study had proved that activated carbon from Leucaena leucocephala biomass have the good potential to be used for removal of cadmium from wastewater.
Romisuhani Ahmad, Mohd Mustafa Al Bakri Abdullah, Wan Mastura Wan Ibrahim, Kamarudin Hussin, Fakhryna Hannanee Ahmad Zaidi, Jitrin Chaiprapa, Jerzy J. Wysłocki, Katarzyna Błoch, and Marcin Nabiałek
MDPI AG
The primary motivation of developing ceramic materials using geopolymer method is to minimize the reliance on high sintering temperatures. The ultra-high molecular weight polyethylene (UHMWPE) was added as binder and reinforces the nepheline ceramics based geopolymer. The samples were sintered at 900 °C, 1000 °C, 1100 °C, and 1200 °C to elucidate the influence of sintering on the physical and microstructural properties. The results indicated that a maximum flexural strength of 92 MPa is attainable once the samples are used to be sintered at 1200 °C. It was also determined that the density, porosity, volumetric shrinkage, and water absorption of the samples also affected by the sintering due to the change of microstructure and crystallinity. The IR spectra reveal that the band at around 1400 cm−1 becomes weak, indicating that sodium carbonate decomposed and began to react with the silica and alumina released from gels to form nepheline phases. The sintering process influence in the development of the final microstructure thus improving the properties of the ceramic materials.
Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Kamarudin Hussin, Aeslina Abdul Kadir, and Romisuhani Ahmad
Springer Singapore
Romisuhani Ahmad, Mohd Mustafa Al Bakri Abdullah, Kamarudin Hussin, and Wan Mastura Wan Ibrahim
Springer Singapore
Ahmad Syauqi Sauffi, Wan Mastura Wan Ibrahim, Romisuhani Ahmad, Nurul Aida Mohd Mortar, and Fakhryna Ahmad Zaidi
AIP Publishing
Metakaolin is one of the mainly used materials in geopolymer due to the aluminosilicate content in it. Besides that, dolomite is also materials that have aluminosilicate content which are lower than metakaolin. Because of that, the properties of metakaolin/dolomite geopolymer were studied. The parameters used for this study are solid to liquid of 0.6, alkaline activator ratio of 2.0 and sodium hydroxide of 10M based on previous studies. The metakaolin/dolomite geopolymer were prepared by mixing the solid precursor and alkaline activator using the mechanical mixer for 5 minutes and then casted in 50×50×50cm mold. The additions of dolomite into metakaolin were done by 10%, 20% and 30% by mass. The metakaolin geopolymer with no addition of dolomite act as the control for this study. The results for 7 days show that the minor addition of dolomite into metakaolin which is 10% gave better properties with 37.36 MPa compared to others. The strength was supported by the morphology analysis by scanning electron microscopy (SEM), water absorption and density test. Morphology analysis shows the surface of lower compressive strength tends to have more pores, cracks, and unreacted materials. Other than that, increment of dolomite addition will only causes decrement of strength that is lower than the control for the geopolymer.
W M W Ibrahim, R Ahmad, B T Coman, M M A B Abdullah, A Puskas, and V S Jaganathan
IOP Publishing
Abstract Geopolymer material was used as the raw material because it promotes the green technology. In this study, lightweight geopolymer was produced using fly ash as raw material with the addition of alkali activation which is mixture of sodium silicate and sodium hydroxide, foaming agent that gives lightweight properties and finally, underwent curing process. The molarity of sodium hydroxide (NaOH) used was fixed at 12 M while the ratio of fly ash to alkali activator (solid to liquid) used were varied in the range of 2.0, 2.5, 3.0 and 3.5, by mass. Besides that, foaming agent (Polyoxyethylene alkyether Sulfate) was added to the geopolymer sample to give the lightweight properties. The samples were cured at 80 °C for 24 hours in the oven for curing process and left at room temperature prior for testing for 14 days. The testing of sample was conducted in this study which includes density test, compression strength test, water absorption test and scanning electron microstructure (SEM) test. The results obtained for optimum solid to liquid ratio is 2.5, by mass with the optimum value of compressive strength density value. The mechanical and physical properties of lightweight geopolymer were based on the ASTM International Standard.
R Ahmad, M M A B Abdullah, W M W Ibrahim, A V Sandu, P Vizureanu, and M S Tengah
IOP Publishing
Abstract To better understand the structure-mechanical properties relation of additively fabrication of kaolin geopolymer ceramics with sintering method, a comparison study was performed. Kaolin based geopolymer ceramics were synthesized starting from the powders of kaolin based geopolymer, using powder metallurgy method. Typically, the sintering method used are one step (1200 °C – 5 min) and novel two step sintering processes (600 °C-5 min and 1200 °C – 5 min) for both kaolin based geopolymer ceramics with and without ultra high molecular weight polyethylene were applied and compared. The outcome revealed that there is no phase changes on the both sintering method pattern and the two step sintering method giving a smooth surface owing to the densification process during the preheat treatment.
Romisuhani Ahmad, Mohd Mustafa Al Bakri Abdullah, Wan Mastura Wan Ibrahim, Mohd Mahyiddin Ramli, Andrei Victor Sandhu, Nurul Aida Mohd Mortar, and Warid Wazien Ahmad Zailani
IOP Publishing
Abstract Diverse application for geopolymer so called inorganic polymer have been expanded as potential to continue growing at a realistic rate where the properties, processing tolerance and economical are comparable with the existing materials. An aluminosilicate inorganic polymer can be produced at low temperature under highly alkali conditions from a solid aluminosilicate and an alkali silicate solution. The conversion of amorphous to semi-crystalline behaviour of geopolymer into crystalline phases upon heating make the method be an alternate way in producing ceramic materials. For another application related to high temperature packaging and enclosure of electronical devices, piezoelectric behavior turn out to be important properties to the geopolymer ceramic materials. This paper summarize the review on the important research findings on the basic geopolymer systems, current knowledge of geopolymer ceramic, and outline potential piezoelectric effect on ceramic materials.
W I Wan Mastura, A Romisuhani, A M Mustafa Al Bakri, Muhammad Faheem Mohd Tahir, S Ahmad Syauqi, and Nurul Aida Mohd Mortar
IOP Publishing
Abstract This paper reports the results of an experimental work conducted to investigate the correlation between thermal insulation properties with compressive strength and density of lightweight geopolymer prepared by using fly ash as source material and combination of sodium hydroxide and sodium silicate as alkaline activator. The experiments were conducted by varying the ageing time of 3, 7, 28, 60 and 90 days, respectively. The specimens cured for a period of 90 days have presented the highest compressive strength and lowest density accompanied with satisfied value of thermal conductivity. From the results obtained, it was evident that the thermal conductivity had a high correlation coefficient with compressive strength and density.
Masdiyana Ibrahim, Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, and Ahmad Syauqi Sauffi
IOP Publishing
Abstract Geopolymer-based products help eco-accommodating sources of materials such as metakaolin, slag or fly ash. This review explores the blend configuration to generate geopolymer-based metakaolin membrane metakaolin and to evaluate the impact of a range of geopolymer-based metakaolin sintering temperatures at a temperature of 50 °C, 60 °C, 70 °C and 80 °C. As the quick development of a modern culture contributes to a large increase in interest in water, adsorption is taken closer to examined waste water extraction of the adsorption and repulsion of a metakaolin membrane geopolymer. Membrane waste water treatment is chosen to explore simple and inorganic membrane preparation techniques that have long help lives and low production costs. Reviews for geopolymer-based metakaolin membrane were therefore synthesized via a suspension that depends on the quick solidification method of high temperature suspension geopolymer slurries that were used as an adsorbent for treating waste water. Porous geopolymeric spheres have developed a homogenous structure with the aid of electron microscopy and Brunauer Emmett Teller (BET) investigations.Since permeable materials are regularly adsorbents, this examination has analyzed the adsorption by membrane geopolymers of heavy metals. This finding will advance the formation of improved wastewater treatment systems and along these lines give an elective answer for ecological harm brought about by substantial metal contaminations. Along these lines, molar (SiO2/Na2O) ratio of metakaolin and sodium silicate are fundamental in assembling a sort of geopolymer-based inorganic membrane which does not require a high temperature sintering process. Adsorption and dismissal consolidated can be utilized for wastewater auxiliary electrical plating forms not exclusively to proficiently wipe out center and low groupings of overwhelming metals in wastewater yet in addition to wipe out little sub-atomic contaminants in wastewater.
Romisuhani Ahmad, Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Andrei Victor Sandu, Nurul Aida Mohd Mortar, Noratikah Hashim, and Warid Wazien Ahmad Zailani
IOP Publishing
Abstract Ceramic materials have demonstrated impressive performance under severe conditions in a wide number of areas including health, energy and environment, transportation and electronic applications. In order to meet the growing demand of specific properties of ceramics, the use of geopolymer method were introduced as an alternate way by providing new material to fabricate geopolymer as ceramic precursor and moving towards green technology. Geopolymer ceramic was produced using fly ash as source materials. Different molarities of sodium hydroxide solution in the range of 8 M to 14 M were used in the preparation of fly ash geopolymer ceramic. The ratio of fly ash/alkaline solution and alkaline activator were kept constant at 2.0 and 2.5 respectively. Physical and mechanical properties such as density, flexural strength and shrinkage were determined. The optimum flexural strength of 61.6 MPa is obtained at the sodium hydroxide concentration of 12 M with the density of 2.21 g/cm3. The formation of almost fully crystalline phase with appearance of albite contribute to the flexural strength of fly ash geopolymer ceramic. Microstructure image result shows that a presence of pores due to sintering effect and smoother matrix which gives denser structure as supported by the excellent density.
Ahmad Syauqi Sauffi, Wan Mastura Wan Ibrahim, Romisuhani Ahmad, Nurul Aida Mohd Mortar, Fakhryna Ahmad Zaidi, and Warid Wazien Ahmad Zailani
IOP Publishing
Abstract Dolomite is a carbonate mineral in nature. Dolomite (CaMg(CO3)2) is an anhydrous carbonate mineral composed of calcium, magnesium, and carbonate. The word dolomite is also used to describe the sedimentary carbonate rock, which is composed predominantly of the mineral dolomite (also known as dolostone). Dolomite had been one of the frequent used materials in most of researches due to its accessibility to acquire and the properties. The composition of Ca and Mg became one of the main attractions for the usage of this natural mineral. One of the main properties needed to be studied when using any materials is morphology of the martial. Morphology analysis can give much valuable information about the surface topography and composition of the sample. Other than that, detailed three-dimensional and topographical imaging can also be obtained. This can helps the researches to finds the core value or the novelty in their study. Thus, reviews for the morphology analysis of dolomite were done to investigate how the structures of dolomite develop for certain study and usage. Besides that, dolomite as an addition into certain materials were reviewed and compared to observe the interactions and changes happened.
Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Romisuhani Ahmad, Muhammad Faheem Mohd Tahir, Nurul Aida Mohd Mortar, and Muhammad Amirul Aziem Noor Azli
IOP Publishing
Abstract Geopolymers are amorphous to semi-crystalline with excellent physical and and mechanical properties. It has been used to become a potential binder to Ordinary Portland Cement (OPC) in certain applications due to its lower emission of carbon dioxide gases and low energy consumption sustainability criteria. Bottom Ash (BA) is one of the main industrial by-products and it is produced at the bottom of the furnace during the coal combustion process in electricity generation. The application of BA as a sustainable construction material in the building industry plays an important role in order to decrease the volume of residual waste and conserving existing natural fine aggregates. The objectives for this study is to study the effect of fly ash to bottom ash ratio and to determine the optimum ratio of fly ash to bottom ash geopolymer for pavement brick application. The chemical composition and morphology of geopolymer reinforcement was analysed by using X-ray Fluorescence and Scanning Electron Microscope. The molarity of the Sodium Hydroxide solution is fixed at 12M. The parameter used in this study are different weight percentage of fly ash geopolymer 0 wt%, 10 wt%, 20 wt%, 30 wt% and 40 wt%. The solid to liquid ratios for this study is 2.0. The curing temperature of this study is 80°C and the curing time is 24 hours. 100% of bottom ash geopolymer is used as a control variable for this study.
Fakhryna Hannanee Ahmad Zaidi, Romisuhani Ahmad, Zarina Yahya, Muhammad Faheem Mohd Tahir, Wan Mastura Wan Ibrahim, and Ahmad Syauqi Saufi
IOP Publishing
Abstract Geopolymers are inorganic material that comprise of silicon(Si) and aluminium(Al) bonded by oxygen atom to form a polymer network. The binder material used for geopolymer such as fly ash and blast furnace are mostly the industrial waste or by-products containing high content of silica and aluminium which acted as precursor for geopolymerization. The raw material plays an important role in the formation of geopolymer for each material may result in different properties of geopolymer. To improve the performance of these binders, numerous studies have been focused on the production of mixes based on blends of reactive precursors. The blends usually involve a Ca-rich precursor such as granulated blast furnace slag (GGBS), and an aluminosilicate source such as metakaolin or low calcium fly ash, to promote the stable coexistence of calcium silicate hydrate (C–S–H) gels formed from the activation of the GGBS and the geopolymer gel (N–A–S–H) produced from the activation of the aluminosilicate. Thus, this paper is intended to review the properties of different type of mixes of blended alkaline system.
Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, Romisuhani Ahmad, Amir Naveed, Che Mohd Ruzaidi Ghazali, and Masdiyana Ibrahim
IOP Publishing
Abstract Geopolymers are inorganic polymeric materials and cementations materials that replace the Ordinary Portland Cement. This study aimed to determine the effect of thermal resistance of fly ash based lightweight geopolymer and to investigate the physical, mechanical and microstructure properties of lightweight geopolymer at different thermal resistance. Considering the fire endurance assessment of geopolymers, the evolution of geopolymer during thermal exposure is of interest. This paper presents a comparative study of the characteristic of unfoamed (control sample) and lightweight geopolymers after exposure to elevated temperatures which is 200 °C, 400 °C, 600 °C and 800 °C. Lightweight geopolymers were prepared by adding foaming agent which is polyoxyethylene alkyether sulphate with geopolymer paste. Fly ash, alkaline activator and foam were mixed to produce a homogeneous mixture, which was placed into a cube 50 mm x 50 mm x 50 mm mould and cured at 80 °C for 24 hours. The compressive strength, density, chemical composition, microstructure and functional group analyses were studied. Unfoamed geopolymer exhibit higher compressive strength at 47.04 MPa compared to the highest strength of lightweight geopolymer which is 33.26 MPa at 200 °C. However, the lightweight geopolymer produced low density in range 1200 kg/m3 to 1500 kg/m3 compared to the density of unfoamed is 1813.79 kg/m3.
Romisuhani Ahmad, Mohd Mustafa Al Bakri Abdullah, Wan Mastura Wan Ibrahim, Andrei Victor Sandu, Warid Wazien Ahmad Zailani, and Sharun Nizam Shahrun Nahar
IOP Publishing
Ceramics has come to be progressively very important in industry because of their exceptional mechanical and physical properties The motivation to develop fly ash geopolymer ceramics was to overcome the problem associated with the conventional technical ceramics like alumina, silicon, carbide, aluminium nitride that fracture easily under mechanical or thermo-mechanical loads. The novelties of this research were providing new material to fabricate geopolymer as ceramic precursor and move towards green technology. Geopolymer substrates were activate by adding the alkaline activator gradually with different ratios of solid to liquid ranged from 0.5, 1.0, 2.0 and 3.0 into fly ash at ambient temperature. The samples were cured before undergo powder metallurgy method. The best and optimum solid to liquid ratio is determined at ratio 2.0 based on flexural strength. The broad, amorphous peak showed by phase analysis indicates that geopolymerization has occurred. The formation of almost fully crystalline phase such as albite has been detected which contributes to the flexural strength of fly ash geopolymer ceramic. Microstructure image shows smoother and complete geopolymer matrix which gives denser structure as supported by the excellent density.
Ahmad Syauqi Sauffi, Wan Mastura Wan Ibrahim, Mohd Mustafa Al Bakri Abdulla, Romisuhani Ahmad, Fakhryna Ahmad Zaidi, Andrei Victor Sandu, and Subaer
IOP Publishing
Abstract In Malaysia, several geopolymer materials were mainly from fly ashes, kaolin, metakaolin, and boiler ash which were mainly used to prosper sustainable development especially in the building and construction sector. Geopolymers can be classified as inorganic materials that were formed with the reaction between alminosilicate materials and alkaline solutions. This reaction causing a crystalline compounds mixture to form that toughen to become a novel compound through a process called geopolymerization process. These geopolymer materials have many admirable advantages, including high strength, small shrinkage, decent thermal resistance and good chemical resistance. Although they were used as a stand-alone material with great properties, combination with another material might be another way to improve their properties. A few studies had shown that the geopolymer material can achieve better properties with the addition of moderate amount of calcium-containing material to a geopolymer. The addition of carbonate materials can have insignificant effect on the geopolymer configuration and properties. Thus, this paper review the usage of carbonate materials for example Dolomite (CaMg(CO3)2) and Calcite (CaCO3) as an addition into these geopolymer material.
Fakhryna Hannanee Ahmad Zaidi, Romisuhani Ahmad, Mohd Mustafa Al Bakri Abdullah, Muhammad Faheem Mohd Tahir, Zarina Yahya, Wan Mastura Wan Ibrahim, and Ahmad Syauqi Sauffi
IOP Publishing
Over the decades, concrete is widely known as the most resourceful construction material as it is suitable for many building applications. However, despite its ability to last hundreds of years in many applications, it has been proven that Portland cement concrete poses problems such as carbon dioxide emission and its durability when exposed to sea water, sulphuric soils or freezing weather. As a result, an alternative binder is in need to reduce these problem which nowadays, the uses of geopolymer concrete is promoted. Therefore, this research is intended to investigate the effect of marine environment towards geopolymer concrete and is compared to OPC concrete. By using the same curing conditions, both type of concrete is immersed in artificial seawater for total of 28 days before the properties such as water absorption, density and compressive strength is tested. As a result, despite the similar density, the GPC is found to have lower water absorption and higher compressive strength when compared to OPC concrete. As a conclusion, GPC exhibits a higher resistance to seawater thus, suitable for construction in marine environment when compared to OPC.
RECENT SCHOLAR PUBLICATIONS
MOST CITED SCHOLAR PUBLICATIONS
RESEARCH OUTPUTS (PATENTS, SOFTWARE, PUBLICATIONS, PRODUCTS)
INTELECTUAL PROPERTY (IP) /PATENT:
1. Geopolymer brick fabrication system. (United States Patent No: 9597818) – Inventor
2. Geopolymer brick fabrication system. (United States Patent No: US20160031117A1) – Inventor.
3. Alkali Activated Materials Membrane and A Method To Produce The Same.
(PI2020004793) – Inventor
4. A Method to Manufacture Sustainable, Selfcured, Chemical-Resistant and Heavy Loadbearing Geopolymer Paving Materials There of Useful for Highway Construction. (PI2021005611) – Inventor
5. Self-Supported Geopolymer Membrane/Particles from Aluminosilicate Sources for Wastewater Treatment (LY2022P05474) - Inventor.
6. Alkali Activated Metakaolin as an Adsorbent for Copper Ions Removal - (LY2022P05475) - Inventor.
CONSULTANCY
1. Invited Speaker-International lecture on Green Materials & Technology, 28 September 2018, Universitas Negeri Makassar, Indonesia.
2. Invited Speaker-Institut Sepuluh Novemver, Indonesia, 1 Oktober 2018.
3. Jury – CEGeoGTech- SoME Postgraduate Open Day, UniMAP
4. Jury – 2019 Annual Student Exhibition and Conference (ANEX 19), 2nd May 2019, UniMAP
5. Jury – Pertandingan Inovasi Darulaman 2019 (PRiSm 19), 22 – 23 Julai 2019, Institut Pendidikan Guru Darulaman
6. Jury – International Conference on Science, Technology and Engineering (ICSTEM 2020), 18 – 20th May 2020, UniMAP
7. Jury – IPERLIS 2021, 30th JUNE 2021, Virtual Event
8. Jury – European Exhibition of Creativity and Innovation (EUROINVENT 2022), Iasi, Romania
9. Chairman of Section – International Conference on Innovative Research (ICIR), Iasi, Romania
10. Jury – National Innovation and Invention Competition 2022 (NIICe 2022), 22 August 2022
11. Jury – SIRIM Invention, Innovation & Technology Expo (Si2TE) 2022, 19-21 JULAI 2022
12. Jury – Innovative Research, Invention and Application Exhibition (I-RIA 2022), 13 JULAI 2022
13. Invited Speaker- Applications of Physics in Mechanical and Material Engineering APMME 2022, September 23, 2022 in Częstochowa, Poland.
14. Invited Lecture - International Mobility Programme, Faculty of Materials Technology, Ho Chi Minh City University of Technology, 20 September 2022.
15. Chairman of Section – 1st International Conference on Geopolymer and Sustainable Materials (IConGSM 2022), Ho