Roshartini Omar

Tun Hussein Onn University of Malaysia

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Md Azree Othuman Mydin

Universiti Sains Malaysia

Norliana Sarpin

Tun Hussein Onn University of Malaysia

Sulzakimin Mohamed

Waziri Umaru Federal Polytechnic, Birnin Kebbi

Mohd Nasrun Mohd Nawi

Northern University of Malaysia

Anmar Dulaimi

University of Karbala

Mohd Mustafa Al Bakri Abdullah

Universiti Malaysia Perlis

Kai Chen Goh

Tun Hussein Onn University of Malaysia

Samadar S. Majeed

Nawroz University

Haryati Shafii

Tun Hussein Onn University of Malaysia

Paul O. Awoyera

Prince Mohammad bin Fahd University

Cooperative Institutions

Tun Hussein Onn University of Malaysia

ORCID

Universiti Malaysia Pahang Al-Sultan Abdullah

Universiti Sains Malaysia

Universiti Teknologi MARA

Universiti Malaysia Perlis

National University of Malaysia

University of Technology Malaysia

Yes Technologies (United States)

Institute of Technology of Cambodia

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Study on freshness, morphology, strength, and durability properties of foamed concrete reinforced with agave fiber

Journal of Engineered Fibers and Fabrics (2024)

Md Azree Othuman Mydin Samadar S. Majeed Alireza Bahrami Anmar Dulaimi Yasin Onuralp Özkılıç

Currently, foamed concrete (FC) is widely employed in building construction and civil engineering works, and by using abundant natural fibers in FC, significant environmental benefits can be obtained. The durability properties of the essential materials acting independently could well be enhanced if the appropriate proportion of natural fiber-strengthened FC were used in the correct volume. This study aimed to develop new composite materials composed of FC and agave fiber (AF). The objective was to ascertain the optimal proportion of AF to be added to FC to increase its durability performance. A low-density FC of 950 kg/m 3 was fabricated utilizing varying percentages of AF, namely 0% (control), 1.5%, 3.0%, 4.5%, 6.0%, and 7.5%. The evaluated properties were the shrinkage, workability, density, water absorption, ultrasonic pulse velocity, porosity, compressive strength, and elastic modulus. Using AFs in FC, the optimal shrinkage and ultrasonic pulse velocity were observed. When the weight fractions of AF were increased from 1% to 4.5% in the mixtures, the porosity, workability, and water absorption of FC were significantly reduced. In addition, FC showed a slight increase in the dry density with the rise in the AF’s weight fraction and the increase in the curing age from day-7 to day-56. This research delivers noteworthy data on the durability properties of FC-AF composites, allowing future researchers to study other properties like the structural performance, strength properties, and thermal conductivity of FC-AF composites.

Agave

Breaking strength

Morphology

10.1177/15589250241265701

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Integration of Facilities Management Considerations in Design Stage of Construction Project

Research in Management of Technology and Business (2021)

Neng Wei Hen Norliana Sarpin Roshartini Omar Seow Ta Wee Kai Chen Goh

Ineffective design of a facilities is one of the factors that challenge the execution of activities supported by facilities management (FM). Designers and clients are not usually interested in FM service considerations during design stage because they think they are saving money. However, ineffective design has cause issues during the post-occupancy activities of a facilities. Without any denial, integration of FM considerations in design stage is a challenging task. Therefore, the objectives of this research are to identify the challenges of integrating FM consideration during building design stage and to suggest potential approaches to improve the integration of FM considerations in building design. The scope of this research is involves FM contractor in Selangor. Quantitative method was adopted by distributing a questionnaire survey to the FM contractor. In this research, data being collected was analyzed by using Statistical Package for Social Science (SPSS) version 22.0. The results show that the most significant challenges is related to FM challenges category namely FM is still immature in Malaysia and knowledge transfer from FM to the design are still poor. The most significant potential approaches suggested is designers and clients should get the FM on board early during design stage. In conclusion, this research is important as one of the steps to improve the integration of FM considerations in design stage of a construction project.

Scope (computer science)

Facility management

Post-occupancy evaluation

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Mechanical Properties of Sustainable Mesocarp Fibre Reinforced Lightweight Foamed Concrete

Journal of Advanced Research in Applied Sciences and Engineering Technology (2022)

Jeffery Anak Pirah Md Azree Othuman Mydin Mohd Nasrun Mohd Nawi Roshartini Omar

Foamed concrete has a tension weakness that can be mitigated by adding a suitable proportion of waste by-products such as mesocarp and trunk fibres. Accordingly, this study was conducted to explore the feasibility of using mesocarp fibre as a reinforcement in foamed concrete. Four varying percentages of mesocarp fibre were used: 0.2%, 0.4%, 0.6%, and 0.8% as an additive in foamed concrete. Two densities were cast and tested: 700 and 1400 kg/m3. After that, all foamed concrete specimens were prepared and tested on 7, 28, and 56 days. Mechanical properties were investigated in this study. The results showed that adding mesocarp fibre to lightweight foamed concrete enhanced its compressive, flexural, and tensile strengths. Because a coarser surface allows mesocarp fibre and matrix interlocking in the cured cement matrix, the surface roughness of the mesocarp has been shown to be favourable for fibre-to-matrix interfacial bonding. According to the findings of this investigation, for a density of 700 kg/m3, 0.4% volume fraction was the optimum quantity of foamed concrete applied to obtain the ideal mechanical properties while 0.6% of mesocarp was optimal for 1400 kg/m3.

Interlocking

10.37934/araset.28.3.177186

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Application of treated sugarcane bagasse fiber in lightweight foamed concrete composites and its influence on strength properties and thermal conductivity

Journal of Engineered Fibers and Fabrics (2024)

Md Azree Othuman Mydin Nadhim Hamah Sor Alireza Bahrami Anmar Dulaimi Jagadesh Palanisamy

The construction industry recognizes the need for green, lightweight, and self-compacting materials that are also ecologically benign. Recent studies suggest that the novel lightweight foamed concrete (LFC) could potentially reduce the self-weight of structures. Adding natural fibers to FC improves its mechanical properties and contributes significantly to sustainability. One of the greatest difficulties in constructing reinforced LFC is the reinforcing steel bars’ corrosion, which impacts the behavior and lifetime structural integrity of concrete buildings. Therefore, this research aims to investigate the potential use of sugarcane bagasse fiber (SBF) in low-density LFC, after altering it with sodium hydroxide-based alkali treatment (NaOH) to enhance its properties. Low-density FCs are prone to serious durability and performance degradation; hence, in this experiment, FCs with a low density of 800 kg/m 3 were fabricated and evaluated. Quantification and evaluation were conducted on several different characteristics, including the slump, density, thermal conductivity, and compressive, flexural, and splitting tensile strengths. The findings suggest that employing SBF with an optimal reinforcing range of 3% to 4% can improve the mechanical characteristics and thermal conductivity of LFC-SBF composites. The slump flow gradually decreased from 1% to 5% of the SBF’s weight fraction. The lowest slump flow was achieved by adding SBF to the LFC mixture at a weight fraction of 5%. The addition of SBF to LFC resulted in a significant boost in the material’s splitting tensile, compressive, and flexural strengths. By adding 4% SBF to LFC, the optimal strength properties were concluded in the material. In addition to this, the weight percent of SBF contributed to an increase in the thermal conductivity of LFC. This was because the porous structure of LFC, which contained SBF, enabled it to absorb heat.

Bagasse

10.1177/15589250241273943

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Efficacy of Foamed Concrete Jacketing using Innovative Fibreglass Fabric for Durability Properties Improvement

Journal of Advanced Research in Applied Sciences and Engineering Technology (2022)

Jeffery Anak Pirah Md Azree Othuman Mydin Mohd Nasrun Mohd Nawi Roshartini Omar

This study intended to observe the effectiveness of foamed concrete jacketing using fibreglass fabric with the goal to enhance its durability properties. LFC of two densities of 500 kg/m3 and 1000 kg/m3 were cast and tested. The LFC specimens were wrapped with 1 layer, 2 layers and 3 layers of fibreglass fabric. The parameters evaluated were porosity, water absorption, drying shrinkage and ultrasonic pulse velocity. The results revealed that adding fibreglass fabric to LFC decreased its porosity and water absorption for both densities. Fibreglass fabric did more than only prevent cracks; it also reduced the drying shrinkage and increased the ultrasonic pulse velocity of LFC. Three layers of fibreglass fabric offered optimal results for all properties studied. As a result of the fibreglass fabric's ability to prevent moisture evaporation and consequent dimension changes in the confined LFC, drying shrinkage strain was kept least. The use of fibreglass fabric not only prevented water from escaping but also stopped it from penetrating the cement matrix. This preliminary study shows a huge potential to utilise fibreglass fabric as a strengthening medium to improve the durability performance of LFC.

Shrinkage

10.37934/araset.28.3.187198

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Influence of Crisscross Fiberglass Strip on Axial Compressive Strength of Lightweight Foamed Concrete

Journal of Advanced Research in Applied Sciences and Engineering Technology (2023)

Md Azree Othuman Mydin Mohamad Sukeri Khalid Roshartini Omar ‎Hadee Mohammed Najm Shaker Qaidi

Concrete use as a building component is already associated with the global construction sector. Since extensive research on concrete has been conducted for many years, there is a growing interest among researchers to conduct studies to increase the capacity of concrete for use in the building sector. Lightweight foamed concrete is one of the cutting-edge solutions developed for lighter and more sustainable buildings. Although this type of concrete has several benefits, its strength is still viewed as being inferior to that of regular concrete. By limiting the LFC with a crisscross fiberglass strip, the authors of this work will demonstrate improvements in LFC behaviour in terms of its compressive strength (CFS). To examine its improvements, 3 different LFC densities were cast and contained with 1 to 3 layers of 160 g/m2 CFS. For this test, the cement-to-sand ratio was fixed at 1.1:5, and the water content was set at 0.45. The results revealed that the compressive strength of LFC confined with 1 to 3 layers of CFS increased by 153%, 97% and 102% were acquired for 600, 1100 and 1600 kg/m3 densities respectively. This demonstrates that the number of layers used affects how positively the confinement of CFS affects the compressive behaviour of LFC.

Limiting

10.37934/araset.29.2.135144

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Citations (1)

Study The Relationship Between Learning Performance And Facilities In The Vocational Special Education Secondary School Malaysia

Journal of Technology Management and Business (2019)

Roshartini Omar Nurul Athira Ruslan

The Disability Policy has outlined accessibility as one of the strategies that will be used to help the person with disable (OKU).According to Azmi and Assain (2010) to determine the quality of the product and also to be trusted, the user satisfaction aspect is very important.Former Women, Family and Community Development Minister, Datuk Seri Shahrizat

10.30880/jtmb.2019.06.01.007

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Enhanced fresh and hardened properties of foamed concrete modified with nano-silica

Heliyon (2024)

Md Azree Othuman Mydin P. Jagadesh Alireza Bahrami Anmar Dulaimi Yasin Onuralp Özkılıç

Nowadays, the application of nanotechnology has gained increased attention in the concrete technology field.Several applications of concrete require light weight; one such concrete used is foamed concrete (FC), which has more voids in the microstructure.In this study, nano-silica (NS) was utilized, which exhibits a pozzolanic nature, and it reacts with other pozzolanic compositions (like lime, alumina, etc.) to form hydrated compounds in concrete.Apart from these hydrated compounds, NS acts as a filler material and enhances properties of concrete such as the fresh and hardened properties.This research examines the fresh, hardened, and microstructural properties of FC blended with NS.The ratio of binder and filler used in this research is 1:1.5, with a water-tobinder ratio of 0.45 and a density of 880 kg/m 3 .A total of six different weight fractions of NS were added to FC mixes, namely 0%, 1%, 2%, 3%, 4%, and 5%.Properties assessed for FC blended with NS were the slump, bulk density, strength parameters (flexural, splitting tensile, and compressive strengths), morphological analysis, water absorption, and porosity.It was concluded from this study that the optimum NS utilized to improve the properties was 3%.Apart from this, the relationship between the mechanical properties and NS dosages was developed.The correlations between the compressive strength and other properties were analyzed, and relationships were developed based on the best statistical approach.This study helps academicians, researchers, and industrialists enhance the properties of FC blended with NS and their relationships to predict concrete properties from other properties.

Filler (materials)

Properties of concrete

10.1016/j.heliyon.2024.e25858

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Citations (4)

Kajian Keberkesanan Penyenggaraan Fasiliti dalam Pengurusan Sisa Pepejal di Kawasan Program Perumahan Rakyat(PPR) Seri Pantai, Kuala Lumpur

Research in Management of Technology and Business (2021)

Nurul Syafiqah Shamsudin Sulzakimin Mohamed Roshartini Omar Norliana Sarpin Haryati Shafii

In Malaysia, public houses such as the People's Housing Program (PPR) require good solid waste facility management in order to provide comfort and safety to the residents of the area. Facility management is an important element that supports the building management and maintenance system. It is also important to ensure that the building environment is always in a tidy and maintained condition, especially buildings that have a high population density and public concentration. However, not all solid waste management emphasizes the maintenance aspect in accordance with the specified management and maintenance system specifications. Imperfect solid waste maintenance can have a negative impact on residents who expect good service delivery and can overcome the problem of unsystematic waste disposal at PPR Seri Pantai. Therefore, a study was conducted to identify the problem of solid waste facility maintenance occurs and find a suitable method to solve it based on the objectives of the study. This study was conducted at PPR Seri Pantai conducted in a qualitative manner by holding an interview session with the City of Kuala Lumpur (DBKL) and observations were also conducted to obtain more information and depth. Therefore, the parties involved must play a role to ensure that solid waste management in the People's Housing Project can be managed appropriately. Through the results of this study, it is hoped to provide useful information to the management of facilities in all people's housing programs (PPR) in overcoming the problem of maintenance of solid waste facilities.

solid waste management

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Key Strategies in Undertaking International Construction Project: Contractors’ Perspective

MATEC Web of Conferences (2019)

Norliana Sarpin Yi Ling Chia Narimah Kasim Hamidun Mohd Noh Roshartini Omar

The pressures of internationalisation have generated a high competitive market on Malaysian construction industry. However, the competitive and saturated of domestic market has driven many Malaysian contractor to undertake international projects. Without any denial, participation in international projects is a challenging task. It requires Malaysian contractors to develop strategy to enable them to operate successfully abroad. Therefore, the objectives of this research is to examine the key challenges for Malaysian contractors to undertake international construction projects thus identify strategies for Malaysian contractors to undertake international construction projects. To achieve the objectives of this research, quantitative method were adopted by using questionnaires. Questionnaire were distributed to participants from well experienced management team of G6 and G7 companies that have vast involvement in international projects. The findings of this research revealed that skilled worker shortage, high cost of financing of international project and limited experience with similar projects are the top three key challenges encountered by the Malaysian contractors in international construction project. The research identifies risk management and forming joint venture are the key strategies for Malaysian contractor to undertake international projects. In conclusion, this research can assist Malaysian contractor who wish to embark in international projects in supporting the current Construction Industry Transformation Programme (CITP) and the 4th Industrial Revolution in construction industry.

Economic shortage

10.1051/matecconf/201926603019

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Citations (4)