Muhammad Munsif Ahmad
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Preferred name
Muhammad Munsif Ahmad
Official Name
Muhammad Munsif , Ahmad
Alternative Name
Ahmad, Muhammad Munsif
Ahmad, M.
Ahmad, M. M.
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Scopus Author ID
57195987713
Researcher ID
HDO-0015-2022

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The effect of coal bottom ash as a replacement on subgrade strength

2020 , Muhammad Munsif Ahmad , N Z Zainol

Coal Bottom Ash (CBA) which is one of coal combustion product (CCPs) obtained from thermal power plant will negatively affect the ecological system which human health ultimately depends on. The increase in demands for landfill requirements and the limitations natural aggregates is quite disturbing unless the new alternative to cut the usage of natural aggregates is found. Therefore, this paper present the laboratory investigation work to improve the strength of subgrade by the replacement of CBA with different percentage varies (0%, 15%, 30% & 40%) by weight. California Bearing Ratio (CBR) test is carried out to obtain the optimum percentage replacement CBA and then some physical which are particle size distribution, Atterberg limit test, specific gravity test and compaction test also carried out to observe the mechanical properties of optimum sample. The optimum percentage of CBA replacement obtained is 40.65% at 30% CBA replacement compared to 17.99% of subgrade soil alone. The moisture dry-density of unmodified soil sample is higher (1.99Mg/m3, 15.34%) than optimum sample (1.95Mg/m3, 10.2%). Moreover, 30% CBA replacement resulted in intermediate plasticity than the subgrade soil which is highly plastic. In conclusion, strength of subgrade soil is highest at 20-30% of CBA replacement.

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Surface resistivity and ultrasonic pulse velocity evaluation of reinforced opc concrete and reinforced geopolymer concrete in marine environment

2021-01-01 , Mohd Badrul Hisyam Ab Manaf , Zarina Yahya , Rafiza Abd Razak , Mohd. Mustafa Al Bakri Abdullah , Ariffin N.F. , Muhammad Munsif Ahmad , Chong Y.C.

The concrete structures that are built along the seaside often suffer from reduced service life due to inadequate durability against deterioration. This research reports the findings of concrete resistivity and quality using two Non-Destructive Testing (NDT) measures applied to Reinforced Geopolymer and Ordinary Portland Cement (OPC) concrete in the marine environment. In addition, the relationship between Reinforced Geopolymer and Reinforced OPC concrete was statistically discussed in-terms of strength and direction. The testing was carried out using a Proceeq Resipod Wenner 4-probe to measure Surface Resistivity (SR) and Ultrasonic Pulse Velocity (UPV), respectively. The testings were carried out on beam shaped samples of OPC and Geopolymer concrete that were immersed in seawater over a period of 90 days with similar curing condition. It was found from the present investigation that the maximum SR and maximum UPV values acquired for both the Reinforced OPC and Reinforced Geopolymer concrete are 2.73 kΩcm and 2.07 kΩcm, as well as 4.18 km/s and 4.05 km/s, respectively. It is apparent from the study that both concrete is comparable in terms of quality and surface resistivity.

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The influence of integrated management system (IMS) on innovation performance in Malaysia construction industry

2021-07-21 , Zainol N.Z. , Ibrahim F.A. , Muhammad Munsif Ahmad , Mohd Zulham Affandi Mohd Zahid , Mohd Badrul Hisyam Ab Manaf

Globally, the construction industry has become a complicated, critical, and exponentially developed leads to increase difficulties and required more innovative and better management system. This leads the organization to find a better solution to their management approach. The international standards in quality, environment, safety, security, supply chain, etc. have been combined to form a comprehensive system called integrated management system (IMS). By implementing a management system standard, organizations can benefit from global management experience and good practice, but the issues arise on the success factors and how they affect the performance of the company. There had been plenty of researches son IMS elsewhere, but this research was focusing on the construction industry in Malaysia in term of innovation performance. The approach is quantitative by disseminating questionnaire to the construction players in the northern region of Peninsular of Malaysia. The IMS's attributes, i.e. integration of IMS and integrated audits, are found to have positive relationship toward the innovation performance of an organization. The model moderately explained 52.8% proven that the attributes should be the focal point of the organization to increase their success factors in boosting their performance, especially in its innovation.

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Study of albumen as foaming agent for use in self-healing high strength concrete

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.

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Mechanical, Durability and Rheology Properties of Ultra High Performance Concrete (UHPC) with Low Cement Content

2021-11-26 , Mohd Zulham Affandi Mohd Zahid , Bakar B.H.A. , Nazri F.M. , Alasmari H. , Latiff M.F.P.M. , Afizah Ayob , Khairunnisa Muhammad , Muhammad Munsif Ahmad , Manaf B.H.A. , Mokhzani Khair Ishak

This current study attempts to investigate the mechanical, durability as well as rheology properties of Ultra-High Performance Concrete (UHPC) with low cement content and using coarse aggregate. The cement content used in UHPC mix in current study was 800 kg/m3. The slump flow, compressive strength, splitting tensile strength, modulus of elasticity, water absorption and water penetration tests were conducted to determine the workability, mechanical and durability properties of explored UHPC mixture. The test results show that the above properties were exceptional and comparable with other UHPC mixtures.

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Marshall Stability of Combination of Perlis Limestone and Granite in Hot Mix Asphalt

2024-06-07 , Mohd Badrul Hisyam Ab Manaf , Mohd. Mustafa Al Bakri Abdullah , Rafiza Abd Razak , Hassan M.R.M. , Muhamad K. , Muhammad Munsif Ahmad

Limestone is used in many countries for road pavement, such as Poland, USA and France. However, there are limitations in terms of mechanical and surface properties, but it has been used in some regions for years, particularly in Perlis, Malaysia, due to the need for a local source. The reason is that of caution of fear, in spite of wanting to explore the opportunities of Perlis limestone being used and understand the advantages and disadvantages of that aggregate. This study focused on the stability, flow, and volumetric by using a combination of Perlis limestone and granite in hot mixed asphalt (HMA) mixtures. The combination of Perlis Limestone and granite was analysed and tested to specification for roadworks by PWD, Malaysia. Furthermore, there will be a cost increment in road construction due to logistic and transportation problems in delivering imported granite aggregate from Kedah state. The result showed that HMA with less Perlis limestone aggregate showed a higher value of stability, flow and stiffness. As for the conclusion, HMA with more granite aggregate has better strength with less deformation compared with HMA with more Perlis limestone aggregate. HMA with more granite aggregate was also was stiffer, mainly due to the interlocking and frictional resistance of the aggregate due to the angularity and rougher surface of granite. However, since all the samples complied with the PWD specification, Perlis limestone proved it can be an alternative aggregate to be used in HMA.

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Assessment of moisture resistance and bonding behavior of cup lump rubber modified asphalt mixture containing wax-based surfactant

2025-01-15 , Zainiah Mohd Zin , Mohd Rosli Mohd Hasan , Azura A Rashid , Muhammad Munsif Ahmad , Tracy Leh Xin Wong , Hui Yao

The present study evaluates moisture induced damage potential using a sessile drop method and a pneumatic adhesion tensile testing instrument (PATTI). The bonding behavior of the aggregates (granite and limestone) and cup lump rubber modified asphalt binder (CMB) with wax-based surfactant (WS) was evaluated. The results revealed that the granite aggregate exhibited a higher work of adhesion compared to the limestone. In the dry condition, the addition of more than 0.15% WS to the CMB reduced the work of adhesion and the bonding strength. Using the sessile drop method, the moisture resistance of the limestone aggregate with the CMB and WS was enhanced, but the bonding strength was reduced. The incorporation of WS reduced the surface free energy (SFE) regardless of the aging conditions and made the aggregate surface more hydrophobic for the increased interfacial adhesion. Incorporating WS in the CMB improved the work of adhesion under the wet condition, thus indicating that WS is an effective anti-stripping agent. Considering its comprehensive properties in the CMB, the amount of WS should be limited to 0.15%.

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The effect of fly ash to alkaline activator ratio to the mechanical properties of stabilized lateritic soil using fly ash based geopolymer

2023-01-01 , Muhammad Munsif Ahmad , Khairunnisa Muhamad , Razak R.A. , Mohd. Mustafa Al Bakri Abdullah , Othman N.A.F. , Nurul Huda H.

Stabilization of fill soil improve its physical and mechanical properties and led to better load carrying capacity and enable steeper temporary slope to be formed during construction period. In this study an industrial by-product, fly-ash (FA), was used as precursor to produce geopolymer as chemical stabilizer to improve the physical and mechanical properties of fill soil. Sodium silicate solution (Na2SiO3) and sodium hydroxide (NaOH) at a concentration of 15 molars were combined as the liquid alkaline activator (AA). The effect of different fly ash to alkaline activator ratio (0, 1.0, 1.5, 2.5 and 3.0) on the physical and mechanical properties of treated fill soil were measured using Atterberg limit test and unconfined compressive strength (UCS) test. All sample were tested at 1 day and 3 days of curing period under room temperature. The result indicates that the highest compressive strength is obtained with fly ash to alkaline activator ratio of 2.5 for both 1 day and 3 days of curing. In addition, the plasticity index of the treated sample for all fly ash/alkaline activator were lower than that of the untreated fill soil.

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Use of Palm Kernel Shell from Agriculture Waste as Partial Replacement for Coarse Aggregate in Hot Mix Asphalt

2024-04-19 , Liyana Ahmad Sofri , Muhammad Faiz Zainal , Muhammad Munsif Ahmad , Khairunnisa Muhamad , Ahmad Faizal Mansor

Palm kernel shell (PKS) is known as a waste material that produced by oil palm factory. In this research, PKS will be used as an alternative to improve the strength and performance of hot mix asphalt (HMA). The bitumen grade of 60/70 PEN and ACW14 had been used in the research. To investigate the strength of PKS in term of designing wearing course, bitumen content of 4% to 6% and different mix design with different percentages content of PKS were provided. The total specimens prepared in this research are 45 specimens. The specific gravity of PKS was lower and showed the high capacity in water absorption compare to the natural aggregate. The increment of percentage for PKS in HMA make the strength in Marshall Specimen became decreases as stated in the result and discussion. Result of optimum bitumen content for PKS 10, PKS 30 and PKS 50 were 4.72%, 4.86% and 4.90% individually. All optimum bitumen content in this research was satisfied with JKR Standard 2008 in term of the design parameter. The specimen of PKS 10, PKS 30 was classified as heavy traffic and PKS 50 was classified as medium traffic. PKS 10 was shown as a good partial replacement for natural aggregate due to the admissibility of parameter, environmental friendly factor and cheapest in costing.

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