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The present study investigated the relationship between the transmission of COVID-19 infections and climate indicators in Dhaka, Bangladesh, using coronavirus infections data available from the Institute of Epidemiology, Disease Control and Research (IEDCR), Bangladesh. The Spearman rank correlation test was carried out to study the association of seven climate indicators, including humidity, air quality, minimum temperature, precipitation, maximum temperature, mean temperature, and wind speed with the COVID-19 outbreak in Dhaka, Bangladesh. The study found that, among the seven indicators, only two indicators (minimum temperature and average temperature) had a significant relationship with new COVID-19 cases. The study also found that air quality index (AQI) had a strong negative correlation with cumulative cases of COVID-19 in Dhaka city. The results of this paper will give health regulators and policymakers valuable information to lessen the COVID-19 spread in Dhaka and other countries around the world.
M. Mofijur; I.M. Rizwanul Fattah; A.B.M. Saiful Islam; M.N. Uddin; S.M. Ashrafur Rahman; M.A. Chowdhury; Asraful Alam; Alhaz Uddin. Relationship between Weather Variables and New Daily COVID-19 Cases in Dhaka, Bangladesh. Sustainability 2020, 12, 8319 .
AMA StyleM. Mofijur, I.M. Rizwanul Fattah, A.B.M. Saiful Islam, M.N. Uddin, S.M. Ashrafur Rahman, M.A. Chowdhury, Asraful Alam, Alhaz Uddin. Relationship between Weather Variables and New Daily COVID-19 Cases in Dhaka, Bangladesh. Sustainability. 2020; 12 (20):8319.
Chicago/Turabian StyleM. Mofijur; I.M. Rizwanul Fattah; A.B.M. Saiful Islam; M.N. Uddin; S.M. Ashrafur Rahman; M.A. Chowdhury; Asraful Alam; Alhaz Uddin. 2020. "Relationship between Weather Variables and New Daily COVID-19 Cases in Dhaka, Bangladesh." Sustainability 12, no. 20: 8319.
The present study investigates the relationship between the transmission of COVID-19 infections and climate indicators in Dhaka City, Bangladesh, using coronavirus infections data available from the Institute of Epidemiology, Disease Control and Research (IEDCR), Bangladesh. The Spearman-ranked correlation test was carried out to study the association of seven climate indicators, including humidity, air quality, minimum temperature, precipitation, maximum temperature, mean temperature and wind speed with the COVID-19 outbreak in Dhaka City, Bangladesh. The study found that, among the seven indicators, only three indicators (air quality, minimum temperature and average temperature) have a significant relationship with new COVID-19 cases. The results of this paper will give health regulators and policymakers valuable information to lessen the COVID-19 infection in Dhaka and other countries around the world.
M. Mofijur; Islam Md Rizwanul Fattah; A. B. M. Saiful Islam; S.M. Ashrafur Rahman; Mohammad Asaduzzaman Chowdhury. Relationship between Climate Variables and New Daily COVID-19 Cases in Dhaka, Bangladesh. 2020, 1 .
AMA StyleM. Mofijur, Islam Md Rizwanul Fattah, A. B. M. Saiful Islam, S.M. Ashrafur Rahman, Mohammad Asaduzzaman Chowdhury. Relationship between Climate Variables and New Daily COVID-19 Cases in Dhaka, Bangladesh. . 2020; ():1.
Chicago/Turabian StyleM. Mofijur; Islam Md Rizwanul Fattah; A. B. M. Saiful Islam; S.M. Ashrafur Rahman; Mohammad Asaduzzaman Chowdhury. 2020. "Relationship between Climate Variables and New Daily COVID-19 Cases in Dhaka, Bangladesh." , no. : 1.
The depletion of fossil fuels and the search for novel sustainable energy sources are challenges faced by countries throughout the world over the past few decades. Microalgae have received considerable interest as new oil sources for biofuel production. However, the enhancement of the lipid content in microalgae strains without decreasing the growth rate is a prerequisite for improving the economic viability of microalgae-derived biofuel production. The implementation of an appropriate cultivation strategy can increase both lipid accumulation and biomass production. One of the most-often suggested strategies is the cultivation of microalgae through two-stage cultivation strategy (TSCS). This paper aims to recapitulate the findings of recent studies and achievements in improving the lipid productivity and economic feasibility of TSCS. This article starts by highlighting different types of TSCS based on various stimuli. Afterwards, the most noteworthy culture parameters, including growth stage and initial cell density, are addressed. The existing experimental results show that lipid productivity can be enhanced by optimizing stress factor(s) and engineering processes. Moreover, it is reported that the modification or elimination of the pre-harvesting phase (which can be done by upgrading technical aspects and/or via stress induction strategies) can promote the economic feasibility of TSCSs.
Maniruzzaman A. Aziz; Khairul Anuar Kassim; Zahra Shokravi; Fauzan Mohd Jakarni; Hongyuan Liu; Nabilah Zaini; Lian See Tan; A. B. M. Saiful Islam; Hoofar Shokravi. Two-stage cultivation strategy for simultaneous increases in growth rate and lipid content of microalgae: A review. Renewable and Sustainable Energy Reviews 2019, 119, 109621 .
AMA StyleManiruzzaman A. Aziz, Khairul Anuar Kassim, Zahra Shokravi, Fauzan Mohd Jakarni, Hongyuan Liu, Nabilah Zaini, Lian See Tan, A. B. M. Saiful Islam, Hoofar Shokravi. Two-stage cultivation strategy for simultaneous increases in growth rate and lipid content of microalgae: A review. Renewable and Sustainable Energy Reviews. 2019; 119 ():109621.
Chicago/Turabian StyleManiruzzaman A. Aziz; Khairul Anuar Kassim; Zahra Shokravi; Fauzan Mohd Jakarni; Hongyuan Liu; Nabilah Zaini; Lian See Tan; A. B. M. Saiful Islam; Hoofar Shokravi. 2019. "Two-stage cultivation strategy for simultaneous increases in growth rate and lipid content of microalgae: A review." Renewable and Sustainable Energy Reviews 119, no. : 109621.
Akter Hosen; Mohd Zamin Jumaat; U. Johnson Alengaram; Nor Hafizah Ramli Sulong; A. B. M. Saiful Islam. Structural performance of lightweight concrete beams strengthened with side-externally bonded reinforcement (S-EBR) technique using CFRP fabrics. Composites Part B: Engineering 2019, 176, 1 .
AMA StyleAkter Hosen, Mohd Zamin Jumaat, U. Johnson Alengaram, Nor Hafizah Ramli Sulong, A. B. M. Saiful Islam. Structural performance of lightweight concrete beams strengthened with side-externally bonded reinforcement (S-EBR) technique using CFRP fabrics. Composites Part B: Engineering. 2019; 176 ():1.
Chicago/Turabian StyleAkter Hosen; Mohd Zamin Jumaat; U. Johnson Alengaram; Nor Hafizah Ramli Sulong; A. B. M. Saiful Islam. 2019. "Structural performance of lightweight concrete beams strengthened with side-externally bonded reinforcement (S-EBR) technique using CFRP fabrics." Composites Part B: Engineering 176, no. : 1.
The seismic hazard of vulnerable regions warrants the investigation of new technologies, such as base level isolation by lead rubber bearing (LRB) devices, that can help to mitigate structural damage on seismic prone buildings. The behavior adopting such technologies can be dynamically observed in simulated environments and thus serves as a valuable metric for their feasibility. LRB base isolators were incorporated into the design of 16 model buildings to better understand how they affected a building’s seismic response while also providing information on the structural parameters. A total of 12 different types of bearing systems were tested in base isolated (BI) buildings against conventional fixed-base (FB) isolated buildings. The system of each model high-rise building was represented by the finite element package. Static as well as dynamic analysis were conducted using response spectrum analysis (RSA) based on the seismic excitation to determine the influence of the model type in the aseismic design and the alteration in superstructure behavior. The study reveals that the LRB isolators can potentially diminish respective story accelerations, story inertia, and base shear. Use of LRB isolators in BI buildings resulted in a 10–20% reduction in base shear compared to FB buildings. A notable lateral shift of superstructure is offered by LRB-induced flexibility. The reduction of story acceleration for response spectrum varies 30% on lower stories up to 70% on upper stories. The LRB systems with higher characteristic strength and relatively less isolation periods shows better productivity to minimize displacements in the bearing face for dropping structural shift. However, the LRB with comparatively lower characteristic strength and high isolation periods shows the most efficiency in controlling base shear, offering least story accelerations and consenting lower story inertia forces.
Walid A. Al-Kutti; A. B. M. Saiful Islam. Potential Design of Seismic Vulnerable Buildings Incorporating Lead Rubber Bearing. Buildings 2019, 9, 37 .
AMA StyleWalid A. Al-Kutti, A. B. M. Saiful Islam. Potential Design of Seismic Vulnerable Buildings Incorporating Lead Rubber Bearing. Buildings. 2019; 9 (2):37.
Chicago/Turabian StyleWalid A. Al-Kutti; A. B. M. Saiful Islam. 2019. "Potential Design of Seismic Vulnerable Buildings Incorporating Lead Rubber Bearing." Buildings 9, no. 2: 37.
DOI: 10.7764/RDLC.17.3.354Significantly growing construction in the earthquake vulnerable regions needs appropriate handling of seismic prone buildings. Insertion of high damping rubber bearing (HDRB) at the building base might be an attractive option for structural safety and economy. This study deals with incorporation of HDRB device in building base and focus on the change of structural behavior for its different categories. Structural responses of base isolated (BI) buildings under site- specific seismic excitation are analyzed. The superstructure of multistoried buildings is represented by a finite element (FE) model comprising multi-degree of freedom. The structural analyses involve the BI as well as fixed base (FB) buildings. The commercial finite element packages SAP 2000 has been used to determine the variation in structural responses performing static and dynamic analyses. Twenty prototype building frames are modelled considering four HDRB categories. The HDRB is found to make the buildings more flexible reducing the seismic responses. The increased natural period leads more importance of building flexibility effects and so the horizontal shift of superstructure increases. The story shear reduces significantly and eventually the reduced overturning moment indicates that the forces are highly overestimated if the bearing is not employed. The acceleration profile presents good agreement with the isolation strategy. Without bearing, story accelerations will be largely glorified. To lessen corresponding story shears and story accelerations HDRB can be chosen as per the specifications and necessities. Such HDRB isolated buildings can withstand rather high seismic tremors in a safe and efficient manner due to radical reduction of story responses and good structural flexibility.
A. B. M. Saiful Islam; Imam Abdulrahman Bin Faisal University. Evaluation of story response in seismic prone building construction using high damping rubber bearing. Revista de la construcción 2019, 17, 354 -363.
AMA StyleA. B. M. Saiful Islam, Imam Abdulrahman Bin Faisal University. Evaluation of story response in seismic prone building construction using high damping rubber bearing. Revista de la construcción. 2019; 17 (3):354-363.
Chicago/Turabian StyleA. B. M. Saiful Islam; Imam Abdulrahman Bin Faisal University. 2019. "Evaluation of story response in seismic prone building construction using high damping rubber bearing." Revista de la construcción 17, no. 3: 354-363.
Walid Al-Kutti; A. B. M. Saiful Islam; Muhammad Nasir. Potential use of date palm ash in cement-based materials. Journal of King Saud University - Engineering Sciences 2019, 31, 26 -31.
AMA StyleWalid Al-Kutti, A. B. M. Saiful Islam, Muhammad Nasir. Potential use of date palm ash in cement-based materials. Journal of King Saud University - Engineering Sciences. 2019; 31 (1):26-31.
Chicago/Turabian StyleWalid Al-Kutti; A. B. M. Saiful Islam; Muhammad Nasir. 2019. "Potential use of date palm ash in cement-based materials." Journal of King Saud University - Engineering Sciences 31, no. 1: 26-31.
The performance of high strength structural lightweight concrete (LWC) using the palm wastes, oil palm shell (OPS) as well as palm oil clinker (POC) has been reported. Existing literatures used either OPS or POC individually for production of LWC. Each concept has their own advantages-disadvantages. In this study, both OPS and POC have been put together as coarse aggregate on the way to see the improvement of mechanical properties of waste based LWC. To achieve this purpose, regular coarse aggregate has been fully replaced by OPS and POC in the concrete. This structural grade lightweight concrete is named as palm shell and clinker concrete (PSCC). Attempts have been made with the series of OPS and POC mixture aimed at identifying for better performance. The quantity of OPS and POC mix has been varied as 30%, 40%, 50%, 60% and 70%. Mechanical properties of PSCC like density, workability, compressive strength at different ages, flexural strength, splitting tensile strength as well as modulus of elasticity have been evaluated. It is revealed that the proposed PSCC has extensive potential in terms of high compressive strength and good material behavior to perform as a better LWC. The study could offer structural lightweight concrete of compressive strength up to 46 MPa that is 31% higher than the control mix. The usage of 50% OPS to 50% POC coarse aggregate by vol. in the concrete mix is found to be the optimum mix. Furthermore, simple correlations have been developed which can easily predict compressive strength, splitting tensile strength, flexural strength, modulus of elasticity and ultrasonic pulse velocity of lightweight concrete.
Nazmul Huda; Mohd Zamin Jumaat; A. B. M. Saiful Islam; Walid A. Al-Kutti. PERFORMANCE OF HIGH STRENGTH LIGHTWEIGHT CONCRETE USING PALM WASTES. IIUM Engineering Journal 2018, 19, 30 -42.
AMA StyleNazmul Huda, Mohd Zamin Jumaat, A. B. M. Saiful Islam, Walid A. Al-Kutti. PERFORMANCE OF HIGH STRENGTH LIGHTWEIGHT CONCRETE USING PALM WASTES. IIUM Engineering Journal. 2018; 19 (2):30-42.
Chicago/Turabian StyleNazmul Huda; Mohd Zamin Jumaat; A. B. M. Saiful Islam; Walid A. Al-Kutti. 2018. "PERFORMANCE OF HIGH STRENGTH LIGHTWEIGHT CONCRETE USING PALM WASTES." IIUM Engineering Journal 19, no. 2: 30-42.
Adopting suitable seismic protection techniques is presently a foremost concern worldwide and has become a governing principle in the growing construction industry globally. Thus, a rapid upsurge in infrastructure development in seismic-prone areas requires proper treatment for building structures. Therefore, the aim of the study is to incorporate a rubber bearing isolation device in a building base in order to diminish the seismic effect on the superstructure. The changes of structural parameters and responses of fixed-based buildings for applying High Damping Rubber Bearing (HDRB) are investigated under site-specific ground excitation. Twenty representative buildings have been used to examine the responses employing four types of HDRB systems. The study reveals that the HDRB makes the structure more flexible, offering reduced structural responses. The introduction of HDRB may help to decrease floor moment by 31~55%, which can allow the structures to withstand comparatively high seismic tremors safely and efficiently. The base isolated structures experience significant lateral shift between 87.15 and 130.15 mm, and relative floor displacement is below 3% because of additional flexibility. The effective inertia height for the BI buildings remains under two-thirds of building elevation showing triangular distribution concentrating to the top story level. The reduction in forces, moments, and relative displacements of the structural members by applying HDRB can ensure economic design and higher structural safety against seismic excitation. ABSTRAK: Penerapan teknik yang sesuai bagi pelindungan gelombang seismos menjadi penekanan semasa di seluruh dunia dan telah menjadi prinsip penentu dalam industri pembinaan secara global. Oleh itu, kenaikan yang cepat dalam pembangunan infrastuktur dalam kawasan terdedah kepada gelombang seismos memerlukan penyelenggaraan yang betul bagi struktur bangunan. Jadi, matlamat kajian ini adalah bagi menggabungkan getah alat pengandar asing dalam teras bangunan bagi mengurangkan kesan seismos pada struktur asas. Perubahan pada parameter struktur dan tindak balas tapak-tetap bangunan bagi penggunaan teknik High Damping Rubber Bearing (HDRB) dikaji di bawah setiap kenaikan getaran gelombang sebenar bawah tanah. Dua puluh bangunan telah digunakan bagi menilai tindak balas terhadap penggunaan empat jenis sistem HDRB. Kajian menunjukkan HDRB membuatkan struktur lebih fleksibel, dan mengurangkan tindak balas terhadap struktur. Penggunaan HDRB dalam pembangunan membantu mengurangkan momen lantai sebanyak 31~55%, di mana struktur bangunan lebih tahan terhadap gegaran tinggi secara selamat dan berkesan. Struktur asas yang terasing mengalami peralihan sisi yang ketara antara 87.15 dan 130.15 mm, dan anjakan lantai relatif di bawah 3% dengan penambahan sistem fleksibel ini. Ketinggian inertia berkesan bagi bangunan BI kekal di antara dua pertiga ketinggian bangunan. Ini menunjukkan pengagihan segitiga tertumpu pada aras atas bangunan. Pengurangan pada daya, momen dan perubahan relatif struktur menggunakan HDRB dapat memastikan reka bentuk lebih ekonomi dan selamat pada bangunan tinggi daripada sebarang gelombang seismos.
A. B. M. Saiful Islam. DIMINISHING SEISMIC EFFECT ON BUILDINGS USING BEARING ISOLATION. IIUM Engineering Journal 2018, 19, 59 -71.
AMA StyleA. B. M. Saiful Islam. DIMINISHING SEISMIC EFFECT ON BUILDINGS USING BEARING ISOLATION. IIUM Engineering Journal. 2018; 19 (1):59-71.
Chicago/Turabian StyleA. B. M. Saiful Islam. 2018. "DIMINISHING SEISMIC EFFECT ON BUILDINGS USING BEARING ISOLATION." IIUM Engineering Journal 19, no. 1: 59-71.
A.B.M.S. Islam; W. Al-Kutti; M.N. Alsaidan; F.S. Alharbi; M. Nasir; F. Anwar. Potential of volcanic waste Scoria as an eco-friendly aggregate to produce Lightweight Concrete. Smart Cities Symposium 2018 2018, 1 .
AMA StyleA.B.M.S. Islam, W. Al-Kutti, M.N. Alsaidan, F.S. Alharbi, M. Nasir, F. Anwar. Potential of volcanic waste Scoria as an eco-friendly aggregate to produce Lightweight Concrete. Smart Cities Symposium 2018. 2018; ():1.
Chicago/Turabian StyleA.B.M.S. Islam; W. Al-Kutti; M.N. Alsaidan; F.S. Alharbi; M. Nasir; F. Anwar. 2018. "Potential of volcanic waste Scoria as an eco-friendly aggregate to produce Lightweight Concrete." Smart Cities Symposium 2018 , no. : 1.
Walid Al-Kutti; Muhammad Nasir; Megat Azmi Megat Johari; A. B. M. Saiful Islam; Abdullah A. Manda; Nawaf Blaisi. An overview and experimental study on hybrid binders containing date palm ash, fly ash, OPC and activator composites. Construction and Building Materials 2018, 159, 567 -577.
AMA StyleWalid Al-Kutti, Muhammad Nasir, Megat Azmi Megat Johari, A. B. M. Saiful Islam, Abdullah A. Manda, Nawaf Blaisi. An overview and experimental study on hybrid binders containing date palm ash, fly ash, OPC and activator composites. Construction and Building Materials. 2018; 159 ():567-577.
Chicago/Turabian StyleWalid Al-Kutti; Muhammad Nasir; Megat Azmi Megat Johari; A. B. M. Saiful Islam; Abdullah A. Manda; Nawaf Blaisi. 2018. "An overview and experimental study on hybrid binders containing date palm ash, fly ash, OPC and activator composites." Construction and Building Materials 159, no. : 567-577.
Inspec keywords: lightweight structures; mixing; recycling; aggregates (materials); workability; compressive strength; construction industry; concrete Subjects: Plasticity (mechanical engineering); Cement and concrete industry; Engineering materials; Environmental issues; Industrial processes; Construction industry
A. B. M. Saiful Islam; M.N. Walid Al-Kutti; F.S. Alharbi; M.N. Alsaidan. Development of Lightweight Concrete Using Saudi Scoria Aggregate - A Preliminary Study. Smart Cities Symposium 2018 2018, 25 (4 pp.) -25 (4 pp.).
AMA StyleA. B. M. Saiful Islam, M.N. Walid Al-Kutti, F.S. Alharbi, M.N. Alsaidan. Development of Lightweight Concrete Using Saudi Scoria Aggregate - A Preliminary Study. Smart Cities Symposium 2018. 2018; ():25 (4 pp.)-25 (4 pp.).
Chicago/Turabian StyleA. B. M. Saiful Islam; M.N. Walid Al-Kutti; F.S. Alharbi; M.N. Alsaidan. 2018. "Development of Lightweight Concrete Using Saudi Scoria Aggregate - A Preliminary Study." Smart Cities Symposium 2018 , no. : 25 (4 pp.)-25 (4 pp.).
Mahmudur Rahman Soeb; A.B.M. Saiful Islam; Mohd Zamin Jumaat; Nazmul Huda; Farhana Arzu. Response of nonlinear offshore spar platform under wave and current. Ocean Engineering 2017, 144, 296 -304.
AMA StyleMahmudur Rahman Soeb, A.B.M. Saiful Islam, Mohd Zamin Jumaat, Nazmul Huda, Farhana Arzu. Response of nonlinear offshore spar platform under wave and current. Ocean Engineering. 2017; 144 ():296-304.
Chicago/Turabian StyleMahmudur Rahman Soeb; A.B.M. Saiful Islam; Mohd Zamin Jumaat; Nazmul Huda; Farhana Arzu. 2017. "Response of nonlinear offshore spar platform under wave and current." Ocean Engineering 144, no. : 296-304.
Arifuzzaman; Muath Najjar; Mahmud Naser Mahmud; A. B. M. Saiful Islam; Muhammad Khan; M. M. Ali. Enhancing the Properties of Marl Soils for Effective Construction in Saudi Arabian Region. Engineering Journal 2017, 21, 111 -126.
AMA StyleArifuzzaman, Muath Najjar, Mahmud Naser Mahmud, A. B. M. Saiful Islam, Muhammad Khan, M. M. Ali. Enhancing the Properties of Marl Soils for Effective Construction in Saudi Arabian Region. Engineering Journal. 2017; 21 (4):111-126.
Chicago/Turabian StyleArifuzzaman; Muath Najjar; Mahmud Naser Mahmud; A. B. M. Saiful Islam; Muhammad Khan; M. M. Ali. 2017. "Enhancing the Properties of Marl Soils for Effective Construction in Saudi Arabian Region." Engineering Journal 21, no. 4: 111-126.
Nazmul Huda; Mohd Zamin Jumaat; A.B.M. Saiful Islam; Kh Mahfuz Ud Darain; M. Obaydullah; Akter Hosen. Palm oil industry's bi-products as coarse aggregate in structural lightweight concrete. Computers and Concrete 2017, 19, 515 -526.
AMA StyleNazmul Huda, Mohd Zamin Jumaat, A.B.M. Saiful Islam, Kh Mahfuz Ud Darain, M. Obaydullah, Akter Hosen. Palm oil industry's bi-products as coarse aggregate in structural lightweight concrete. Computers and Concrete. 2017; 19 (5):515-526.
Chicago/Turabian StyleNazmul Huda; Mohd Zamin Jumaat; A.B.M. Saiful Islam; Kh Mahfuz Ud Darain; M. Obaydullah; Akter Hosen. 2017. "Palm oil industry's bi-products as coarse aggregate in structural lightweight concrete." Computers and Concrete 19, no. 5: 515-526.
Moshiur Rahman; Mohd Zamin Jumaat; A.B.M. Saiful Islam. Weight minimum design of concrete beam strengthened with glass fiber reinforced polymer bar using genetic algorithm. Computers and Concrete 2017, 19, 127 -131.
AMA StyleMoshiur Rahman, Mohd Zamin Jumaat, A.B.M. Saiful Islam. Weight minimum design of concrete beam strengthened with glass fiber reinforced polymer bar using genetic algorithm. Computers and Concrete. 2017; 19 (2):127-131.
Chicago/Turabian StyleMoshiur Rahman; Mohd Zamin Jumaat; A.B.M. Saiful Islam. 2017. "Weight minimum design of concrete beam strengthened with glass fiber reinforced polymer bar using genetic algorithm." Computers and Concrete 19, no. 2: 127-131.
Mahmudur Rahman Soeb; A. B. M. Saiful Islam; Mohd Zamin Jumaat; M. Rafiqul Islam; Nazmul Huda. Hydrodynamic Response of Floating Coupled Spar in Deep Sea. Procedia Engineering 2017, 194, 182 -188.
AMA StyleMahmudur Rahman Soeb, A. B. M. Saiful Islam, Mohd Zamin Jumaat, M. Rafiqul Islam, Nazmul Huda. Hydrodynamic Response of Floating Coupled Spar in Deep Sea. Procedia Engineering. 2017; 194 ():182-188.
Chicago/Turabian StyleMahmudur Rahman Soeb; A. B. M. Saiful Islam; Mohd Zamin Jumaat; M. Rafiqul Islam; Nazmul Huda. 2017. "Hydrodynamic Response of Floating Coupled Spar in Deep Sea." Procedia Engineering 194, no. : 182-188.
Nazmul Huda; Mohd Zamin Bin Jumat; A. B. M Saiful Islam; Mahmudur Rahman Soeb. Influence of palm oil factory wastes as coarse aggregate species for green lightweight concrete. Revista de la construcción 2016, 15, 133 -139.
AMA StyleNazmul Huda, Mohd Zamin Bin Jumat, A. B. M Saiful Islam, Mahmudur Rahman Soeb. Influence of palm oil factory wastes as coarse aggregate species for green lightweight concrete. Revista de la construcción. 2016; 15 (3):133-139.
Chicago/Turabian StyleNazmul Huda; Mohd Zamin Bin Jumat; A. B. M Saiful Islam; Mahmudur Rahman Soeb. 2016. "Influence of palm oil factory wastes as coarse aggregate species for green lightweight concrete." Revista de la construcción 15, no. 3: 133-139.
The recent trend of globalization has seen massive construction leading to the radical destruction of natural stone deposits. To meet the high demand of normal weight aggregate in the production of concrete is a vital issue for ecological imbalances. Solid waste management from the agricultural and manufacture industries is another environmental issue. An innovative solution to reduce the negative impact on the environment is the production of structural lightweight concrete from these solid waste. This paper presents the structural performance of singly reinforced oil palm shell and palm oil clinker concrete (PSCC) beam. The structural-grade lightweight aggregate concrete, PSCC has been produced from the combination of oil palm shell (OPS) & palm oil clinker (POC) which are an agricultural waste and a by-product of palm oil industry. The produced lightweight concrete has the compressive strength of 46 MPa. The experimental works have been conducted involving six singly reinforced beams of dimension 150 mm × 250 mm × 3300 with varying reinforcement ratios (0.70–1.26%). For each type of reinforcement ratio, two beams have been tested under four point bending until failure. The data presented in this paper include the mode of failure, moment capacity, deflection characteristics, cracking behavior and ductility indices. Although PSCC has a low modulus of elasticity, the moment capacity and the deflection of singly reinforced PSCC beams are acceptable as the span-deflection ratio satisfies the allowable limit provided by BS 8110. All PSCC beams show typical flexural performance and experiences ductile failure giving ample amount of warning before the failure. For the beams with higher reinforcement ratio, the deflections at service loads exceeded the limit, suggesting to increase the beam depths. The crack widths of PSCC beams at service loads ranged from 0.21 mm to 0.26 mm satisfying BS 8110 for durability aspects. The ultimate moments predicted using BS 8110 overestimates for the PSCC beams up to the reinforcement ratio of 1.26%. Therefore, 20% overall reduction is suggested in moment capacity calculation using BS 8110. Further investigation is recommended to understand the shear behavior of reinforced PSCC beam
Nazmul Huda; Mohd Zamin Bin Jumat; A. B. M. Saiful Islam. Flexural performance of reinforced oil palm shell & palm oil clinker concrete (PSCC) beam. Construction and Building Materials 2016, 127, 18 -25.
AMA StyleNazmul Huda, Mohd Zamin Bin Jumat, A. B. M. Saiful Islam. Flexural performance of reinforced oil palm shell & palm oil clinker concrete (PSCC) beam. Construction and Building Materials. 2016; 127 ():18-25.
Chicago/Turabian StyleNazmul Huda; Mohd Zamin Bin Jumat; A. B. M. Saiful Islam. 2016. "Flexural performance of reinforced oil palm shell & palm oil clinker concrete (PSCC) beam." Construction and Building Materials 127, no. : 18-25.
The energy absorption capacity of reinforced concrete (RC) elements is one of the crucial structural properties that define their seismic resistance. The use of steel bars for the strengthening or retrofitting of RC beams in view of their superior mechanical behaviour, is predominantly motivated by their energy absorption capacity. This paper presents the strengthening of reinforced concrete by employing the near-surface mounted (NSM) technique using steel bars subjected to flexural loads. Rectangular strengthened RC beams were experimentally and analytically studied. Four-point bending tests were performed up to failure, in which the load, mid-span deflection, strains and failure mode were recorded. The RC beams were strengthened with different ratios of the NSM reinforcement. The test results revealed that the energy absorption capacity with the NSM ductile materials increase by up to 80% compared with the control beam. In addition, the steel bars showed a significant increase of the ultimate load by up to 70%. The results predicted on the basis of analytical models show good agreement with the experimental results.
Akter Hosen; Mohd Zamin Jumaat; A. B. M. Saiful Islam; M. Obaydullah; Kh. Mahfuzud Darain; Nazmul Huda. Investigation on Energy Absorption Capacity of Reinforced Concrete Beams by the Near-Surface Mounted Technique Using Ductile Materials. Science of Advanced Materials 2016, 8, 1536 -1546.
AMA StyleAkter Hosen, Mohd Zamin Jumaat, A. B. M. Saiful Islam, M. Obaydullah, Kh. Mahfuzud Darain, Nazmul Huda. Investigation on Energy Absorption Capacity of Reinforced Concrete Beams by the Near-Surface Mounted Technique Using Ductile Materials. Science of Advanced Materials. 2016; 8 (8):1536-1546.
Chicago/Turabian StyleAkter Hosen; Mohd Zamin Jumaat; A. B. M. Saiful Islam; M. Obaydullah; Kh. Mahfuzud Darain; Nazmul Huda. 2016. "Investigation on Energy Absorption Capacity of Reinforced Concrete Beams by the Near-Surface Mounted Technique Using Ductile Materials." Science of Advanced Materials 8, no. 8: 1536-1546.