Abdul Rahman Mohd.Sam

Abdul Rahman Mohd.Sam
Universiti Teknologi Malaysia | UTM · Department of Structure and Materials

PhD

About

157
Publications
59,949
Reads
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2,089
Citations
Additional affiliations
December 1989 - December 2025
Universiti Teknologi Malaysia
Position
  • Associate Professor / Head of Construction Materials Research Group (CMRG)

Publications

Publications (157)
Article
Full-text available
In practical applications, problems related to proper curing arise for inclined structural elements, especially in skyscrapers, wherein concrete is very thick. To overcome this problem, the implementation of self-curing technology using varieties of smart materials has become significant. Based on these factors, this study determined the impact of...
Book
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Geopolymer mortars have been identified as potentially superior and environmentally friendly high-performance construction materials. This book offers readers insight into the synthesis, properties, benefits, and applications of geopolymer-based materials for concrete repair. The progressive deterioration of concrete surface structures is a major c...
Article
Full-text available
The spread of the COVID-19 pandemic has impacted the economy of the world as well as the construction industry in Malaysia. Many projects were plagued with time and cost overruns due to the COVID-19 pandemic. Site work progress came to an abrupt halt, and productivity stagnated. With that in mind, this study was conducted on the basis of first-hand...
Article
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Due to population growth and industrial development, waste generation has increased annually over the last few years. According to a World Bank report, in 2018, about 2.01 billion tons of municipal solid waste were generated, and this amount was predicted to grow to 3.40 billion tons by 2050 (Kaza et al 2018). Waste glass (WG) is among the largest...
Article
Full-text available
Interlocking Hollow Block System (IHBS) is a reasonable solution for conventional block masonry due to its structural ability and building capability. In addition, economic and ecological building of brickwork can be achieved by incorporating fly ash into IHBS. The main aim of the research is to produce interlocking compressed hollow block that sat...
Conference Paper
Full-text available
Infrastructure is a form of public capital formed from an investment made by the government. The intended infrastructure includes roads, bridges, irrigation, and others. In Indonesia, there is currently a slowdown in the implementation of infrastructure development which is marked by the lack of quality and quantity of the infrastructure. Infrastru...
Article
This paper evaluated feasibility of using the waste rubber tire crumbs (WRTCs) as partial replacement for the natural aggregates in production of alkali-activated rubberized concrete (AARC). Numerical model calculations using the neural network technique were performed to evaluate the overall performance of the proposed rubberized concretes in term...
Article
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Citation: Faridmehr, I.; Nehdi, M.L.; Huseien, G.F.; Baghban, M.H.; Sam, A.R.M.; Algaifi, H.A. Experimental and Informational Modeling Study of Sustainable Self-Compacting Geopolymer Concrete. Sustainability 2021, 13, 7444.
Article
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The increased demand for cement mortar due to rapid infrastructural growth and development has led to an alarming depletion of fine aggregate. This has prompted the need for a more sustainable material as a total/partial replacement for natural fine aggregate. This study proposes the use of tin slag (TS) as a replacement for fine aggregate in concr...
Article
The demand of highly sustainable and eco-friendly construction materials with low energy consumption and carbon emission has ever been increasing globally. In this rationale, some modified concretes were prepared via the replacement of the ordinary Portland cement (OPC) by the effective microorganism (EM) and fly ash (FA) at an optimum proportion....
Article
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Purpose – Concrete-filled steel hollow (CFHS) column is an innovation to improve the performance of concrete or steel column. It is believed to have high compressive strength, good plasticity and is excellent for seismic and fire performance as compared to hollow steel column without a filler. Design/methodology/approach – Experimental and numerica...
Article
In most developed countries, over fifty percent of the residential energy is consumed annually for space heating and air conditioning. Presently, the worldwide requirement is to reduce CO2 emission and energy demand in the Clean built environment (CBE). This prompted the construction sector to explore innovative solutions and novel building concept...
Article
Purpose Concrete-filled steel hollow (CFHS) column is an innovation to improve the performance of concrete or steel column. It is believed to have high compressive strength, good plasticity and is excellent for seismic and fire performance as compared to hollow steel column without a filler. Design/methodology/approach Experimental and numerical i...
Article
Full-text available
Alkali activated concretes have emerged as a prospective alternative to conventional concrete wherein diverse waste materials have been converted as valuable spin-offs. This paper presents a wide experimental study on the sustainability of employing waste sawdust as a fine/coarse aggregate replacement incorporating fly ash (FA) and granulated blast...
Article
The improvement of the rheology, morphology and strength performance of the self-compacting alkali-activated concretes (SCAACs) incorporated with fly ash (FA) as ground blast furnace slag (GBFS) replacement remains challenging. To meet this need, five mixtures were prepared with different amounts of FA (30, 40, 50, 60 and 70, weight %) as the GBFS...
Article
The limitation of natural resources and the increase in industrial waste materials have been being the main concern in many developing countries. Therefore, many studies have been conducted to investigate the feasibility of industrial by-products to be used as artificial aggregate in concrete manufacturing. This study examined the influences of usi...
Article
The limitation of natural resources and the increase in industrial waste materials have been being the main concern in many developing countries. Therefore, many studies have been conducted to investigate the feasibility of industrial by-products to be used as artificial aggregate in concrete manufacturing. This study examined the influences of usi...
Article
Over the past few years, concrete durability has attracted much attention from researchers. The demand for durable and sustainable concrete is on the rise due to the daily increase in global greenhouse gas (GHG) emissions and global warming. This has necessitated the use of chemical admixtures as ingredients to improve the fresh and hardened proper...
Article
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Lightweight concrete (LWC) can increase mix volume by adding supplementary qualities like reducing the dead load making it less heavy than normal concrete having density up to 1840 kg/m3. This paper presents results and discusses the crumb rubber (CR) usage to make LWC and consequences on fresh and hardened characteristics of the LWC. Firstly, char...
Article
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Emission of carbon dioxide during the production of cement has turned the attention of many researchers to find its solution. Ceramic tiles are being used throughout the world, which increases the problem of its disposal after their usage. In this project, an attempt is made to explore the potential of using ceramic waste powder (CWP) as a cement r...
Article
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The autonomous crack healing process using microbiologically induced calcium carbonate precipitation (MICP) is a sustainable alternative to overcome propagation of micro-cracks and restore the durability of concrete. This paper presents the potential use of tropical soil bacteria as a self-healing agent for fly ash concrete. A solution of 10 ⁷ cell...
Article
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The construction industry is in search of cleaner and greener alternatives for materials in concrete. The main objective of this study was to determine the properties of concrete using recycled ceramic waste aggregates (CWA). In this study, natural fine and coarse aggregates were partially substituted as ceramic waste aggregate in the range of 25%,...
Article
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In recent years, microbial calcium carbonate has been recognised for its potential to self-heal cementitious material by mimicking the natural biological systems of healing wounds. Thus, the inevitable microcracks and concrete pores can be filled with microbial calcium carbonate to prevent any aggressive chemical flow or water and prolong the life...
Article
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The primary reason for the curing of concrete is to complete the hydration reactions of cement with other materials. However, the problem occurs when required ideal curing becomes challenging due to various anomalous structural elements. To mitigate this issue, a bacterial solution known as Effective Microorganism (EM) has been introduced as a self...
Article
Full-text available
The principal of molecular structure of cement mortar is important as it shows a component and interaction between cement and additive. By using a themogrativimetric analysis, the phase of mortar structure when exposed to high temperature can be determined. This paper presents the study on influence of epoxy resin without hardener on the microstruc...
Article
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Marine kaolin can be found easily at the coastal regions in Malaysia. During infrastructure works, huge quantities were excavated and is treated as unsuitable soil material (USM). This study offers a value-added solution to convert marine kaolin into supplementary cementitious material (SCM) through thermal activation. 10% replacement of Ordinary P...
Article
Microbial calcium carbonate has been widely investigated to self-heal concrete cracks. However, the issue revolving around the efficacy of crack self-healing remains important. In particular, existing works are still lacking of a better understanding of the factors affecting the fundamental reactions involved as well as bacterial growth in harsh co...
Article
This study explored rheological and hardened-state properties of self-compacting alkali-activated concrete (SCAAC) incorporating ceramic tile powder waste (CPW) for construction activities. Samples containing 100% ground blast furnace slag (GBFS) were used as reference. Test data revealed that the mini-slump flow enhanced, while the plastic viscosi...
Article
Blended concrete has later strength development with long maturity strength development. An accelerator is thus needed to enhance the early strength development of concrete. This paper shows the combination of ground palm oil fuel ash and eggshell powder that was designed for later and early strength development, respectively. Two types of eggshell...
Article
The application of copious and low-cost waste items, mainly from neat resources, has developed extra demanding than always. This paper debates the utilization of bamboo waste as original and new things in the building industry. The study comprises rudimentary characteristics, containing the morphology of the ingredients in terms of variations in th...
Article
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Globally, marine clay is found in coastal areas. It is often regarded as a profitless material because it affects building foundations, dredging and replacing it with a more suitable material before construction is therefore inevitable. However, the dumping of this marine clay after excavation has become a major problem in most countries like Singa...
Article
Purpose The purpose of this paper is to examine the mechanical properties, material composition of spent garnet as a sand replacement in high-strength concrete at room and elevated temperatures. Bonding of the concrete containing spent garnet and reinforcing rebar is investigated. Moreover, the optimum thickness of concrete cover subjected to eleva...
Article
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This paper presents the mechanical properties of polymer concrete (PC) containing active-mobilize micro filler of palm oil fuel ash (POFA). As known fact, the wrong chosen of filler for PC will lead to give poor properties of PC. In this study, the POFA was divided into two types; ground POFA and unground POFA. The fine micro filler of ground POFA...
Article
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Concrete cover plays an important role in protecting the reinforcement from harmful environments and high temperatures. In this study, the effects of the concrete cover containing garnet and rebar prepared with cover thicknesses of 20 and 30 mm and subjected to temperatures of 20°C, 200°C, 400°C, 600°C and 800°C for 1-hour duration were determined...
Article
This paper investigates the possibility of using garnet waste as river sand replacement in high-strength alkali-activated mortars (AAMs) containing fly ash (FA) and ground blast furnace slag (GBFS). The garnet waste replacing river sand was used at varying levels of 0, 25, 50, 75, and 100%, by weight. In this study, the ratios of binder to aggregat...
Article
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Over the last few decades, effects of climate change have been widely studied by researchers. This change alters environmental conditions, which in turns influence the activities of bacteria. Therefore, this study assesses the effect of climatic variation on bio cement mortar- based infrastructure. This is achieved by evaluating the effects of temp...
Article
In the urban regions worldwide, saving energy, lowering carbon dioxide (CO2) emissions, and disposing waste arising from the manufacturing of diverse consumer products remain major challenges. Annually, million tons of glass bottle wastes are generated and only a few percent are recycled. In this study, glass bottles waste Nano powder (BGWNP) was p...
Conference Paper
The primary reason for the curing of concrete is to complete the hydration reactions of cement with other materials. However, the problem occurs when required, ideal curing becomes challenging due to various anomalous structural elements. To mitigate this issue, a bacterial solution known as Effective microorganism (EM) is introduced as an additive...
Article
Full-text available
California Bearing Ratio of subgrade lesser than 5% requires a treatment work either by stabilisation or strengthening method. In this study, the latter concept was chosen for the application of U-shaped Subgrade Concrete Panel as it is a method that has less disturbance to the native soil. As the name suggested, this U-shaped Subgrade Concrete Pan...
Article
Presently, the construction industries worldwide are looking for materials with low carbon footprint and environment friendliness. Yet, ordinary Portland cements (OPC) based materials are widely used in building sectors and remain majorly responsible for carbon pollution. The deterioration that happens in such concretes from the very beginning of t...
Article
This paper presents the experimental findings of a study on the performance of waste ceramic powder (WCP) as binder on the mechanical and microstructure properties of alkali activated mortars (AAMs) containing ground blast furnace slag (GBFS) and fly ash (FA). In this study, the ternary blend was activated with low concentration of alkaline solutio...
Article
Traditional Portland cement can be effectively substituted by alkali-activated binders. Not only can alkali-activated binders save energy and reduce CO2 emission but they can also augment the durability performance of concrete as well as aid in resolving the landfill problems. It is well-known that extensive quantities of calcined clay waste are cr...
Article
h i g h l i g h t s Various conventional and NDT tests of concrete are reviewed. The MNDT techniques used in concrete applications are summarized. MNDT techniques minimize processing time and preserve of energy. The advantages of MNDT include instant measurements with monochromatic radiation. The findings assist in the selection of suitable methods...
Article
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The incorporation of industrial waste in geopolymer concrete opens new era in the construction industry because of the positive environmental impact. In this study, the effect of using sodium silicate as an activator on some fresh and hardened properties of geopolymer mortar naming, setting time, workability, density, water absorption, compressive...
Article
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Nowadays, concrete is popularly used in many areas and applications in construction industry. If designed and manufactured properly it can be one of the most durable construction materials. However, during the life span of the structure the surrounding environment where the structure is built may pose long-term durability problem to concrete such a...
Article
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Eco-composite in porous concrete is designed with the mix of concrete and a cement replacement, which have the element waste material that being recycled, for example, rice husk ash (RHA), egg shells, palm oil fly ash, wood waste ash, and many more, for the purpose of ecologically sustainable development, and also for managing stormwater quantity a...
Article
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Concrete is one of the most commonly used and popular materials in construction industry. It can be designed to have certain required strength and durability based on its application and surrounding environment. However, one of the setbacks for concrete is that it can suffer from internal micro-cracks during its service life due to various reasons....
Article
Full-text available
This paper presents the findings on the characterization of soil mixed with garnet waste for road shoulder. Road shoulder at local road nowadays has insufficient compaction due to local settlement and further compaction by parked vehicles. Garnet waste is one of the industrial wastes that is getting bulkier, and thus create opportunity to reduce an...
Article
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Hydration reaction is an exothermic reaction, where heat is released during the hardening process of concrete until it reached stable low energy stated the hydration temperature describes the hardening behaviour of concrete. This paper presents the hydration effect on Palm Oil Fuel Ash (POFA) concrete containing Eggshell Powder (ESP)—combination of...
Article
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Fibre-reinforced polymers (FRPs) have been successfully applied to the strengthening of reinforced concrete structures and a similar methodology is adopted by researchers in order to strengthen timber structures using synthetic fibres such as carbon, glass or aramid fibres. This paper explores the viability of using fibres from botanical sources fo...
Article
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Concrete is most widely used material in the construction industry, it also needs a lot of water for its production, so it is an urgent need of research to minimize the use water to produce concrete. This paper review about the materials used as self-curing agents, mechanism of self-curing and the properties of different type of concrete when subje...