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608 articles for “Laboratory”
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Finite Element Analysis and Validation of Axial Capacity of RC Columns Made of Steel Fiber Reinforced Concrete (SFRC)
Abstract: Steel Fiber Reinforced Concrete (SFRC) possesses many excellent dynamic performances such as; high resistance to explosion and penetration. It has little effect on pre-cracking behavior in uniaxial compression, but substantially enhances its post cracking response. This response leads to a greatly improved ductility and toughness. Steel fibers in SFRC are capable of preventing crack propagation as well as brittle failure of columns under uniaxial compression. To this end, four reinforced …
Published in Journal of Construction Engineering, Technology & Management · Vol. 5, Issue 2, 2015 · pp. 9–14 Read article
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Estimation of Life Cycle Cost of RC Infrastructure Using Different Analysis Methods
Abstract: Accuracy of service life prediction largely influence life cycle cost of infrastructure. Recent research come up with the conclusion that ingression of chloride to cover concrete is dependent on the water penetration front which dramatically change the service life. Therefore, in this study chloride ion profiles and behavior of penetrating water for slag concrete with w/c ratio as 40%, 55% and 70%, respectively, cast in laboratory, were examined. Furthermore, life …
Published in Journal of Construction Engineering, Technology & Management · Vol. 5, Issue 2, 2015 · pp. 15–21 Read article
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Method of Analysis for Chloride Distribution in Concrete from Torrent Data
Abstract: Design w/c ratio becomes less important than achieved cover performance in the case of existing structure. Therefore, inspection data of chloride profile from some real structures do not always obey the rule of Fick’s law, suggesting the influence of a new parameter. In this study, chloride ion profiles and behavior of penetrating water for normal, fly ash and slag concrete with w/c ratio as 40, 55, and 70%, respectively, cast …
Published in Journal of Construction Engineering, Technology & Management · Vol. 4, Issue 3, 2014 · pp. 10–19 Read article
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Influence of Mineral Admixture on Compressive Strength of Concrete
Abstract: The current paper shows the results of an investigation focused on the effect of metakaoline (MK) and silica fume (SF) on the compressive strength of concrete. The aim of the study was to investigate the effect of concrete compressive strength containing different percentage levels of metakaoline and silica fume on fresh and mechanical properties of the concrete. Pastes containing 0%, 5%, 10%, 15% and 20% of metakaoline and silica fume …
Published in Journal of Construction Engineering, Technology & Management · Vol. 2, Issue 1-3, 2012 · pp. 42–47 Read article
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Engineering Education Reformation for Sustainable Development and Optimal Civil Engineering Practice in Nigeria
Abstract: Engineering education needs strategic approach and holistic reformation for sustainable development and optimal engineering practice in Nigeria. This study looks into educational reformation in Nigeria with special focus on civil engineering education and practice. The methodology adopted includes investigation on current trends of lecture delivery and quality of graduates from engineering institutions. Literatures were also checked for secondary data and general background of civil engineering training. Strategies for engineering education …
Published in Journal of Construction Engineering, Technology & Management · Vol. 11, Issue 3, 2021 · pp. 7–12 Read article
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Comparison of Flow Process Values for Different PID Controller Techniques
Abstract: The main objective of this paper is to find the best and suitable controller that can be applied for a flow process in a real system. The flow process is done in a cylindrical tank of cascade system. The search of PID controller is done by the steps of acquiring transfer function from the real time open loop response and invoking it to the various tuning techniques of PID controller …
Published in Journal of Control & Instrumentation · Vol. 6, Issue 1, 2015 · pp. 9–13 Read article
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Comparative Realization of 2DoF PID Controllers for Flow Process with Measurement Delay
Abstract: Two Degree-of-Freedom (2DoF) PID control techniques presented in this paper were developed based on optimal control theory and with the Anti-Integral Windup (AIW) scheme. The controllers were implemented for a laboratory flow process setup. First Order Process with Dead Time (FOPDT) models had been identified by step testing. The process responses showed a significant non-minimum phase dynamics exhibited for the specific step inputs applied. The measurement delay was considered as …
Published in Journal of Control & Instrumentation · Vol. 6, Issue 1, 2015 · pp. 1–8 Read article
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Design and Implementation of Two Tank Level Control System
Abstract: This paper designs the electrically based solenoid control valve to controls the level, based on the error voltage from the MATLAB (Matrix Laboratory) control algorithm. Various control algorithms are derived for two tank system. Those algorithms are derived only on simulation data. Most of algorithms are coded using microcontroller. This proposed system is a live model of two tank level system controlled through MATLAB m-code. It consists of components such …
Published in Journal of Control & Instrumentation · Vol. 4, Issue 1, 2013 · pp. 11–15 Read article
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Effect of Ni Addition on the Hardness and Tensile Strength of Al – Cu Alloy Prepared by Powder Metallurgy Technique
Abstract: Aluminium alloys are becoming potential engineering materials offering excellent combination of properties such as high specific strength, high specific stiffness, electrical and thermal conductivities, low coefficient of thermal expansion and wear resistance. Generally, copper and nickel were used as alloying elements in aluminium alloy to increase high temperature strength.Both powder metallurgy as well as casting techniques is used to produce Al-Cu-Ni alloys.However, P/M technique is better suited for preparing this …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 3, 2018 · pp. 19–23 Read article
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Development and Analysis of Load Bank for Steam Power Plant
Abstract: In the present laboratory experimental set up of steam power plant, the power output is converted to an electrical power source by using a load bank which is used as an electrical load. The purpose of a load bank is to accurately impersonator the operational or “real” load that a power source will see in real application. In the existing scenario, the air heater type load bank has some limitations …
Published in Journal of Electronic Design Technology · Vol. 11, Issue 3, 2020 · pp. 24–27 Read article
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Micro-Doppler Signatures for Human with Orbbec Sensor
Abstract: Micro-movements, such as oscillations, rotations or revolution of an object or structures persuade additional frequency modulations on reinstate radar signal, which generates sidebands about the object’s Doppler frequency, called micro-Doppler effect. Human body mechanics consist of various moving body parts, which generate unique micro-Doppler signatures. Using TFT (time frequency transforms and pattern recognition techniques; we can classify individuals based on their movements using micro-Doppler signatures. Preliminary results from a laboratory …
Published in Journal of Electronic Design Technology · Vol. 12, Issue 1, 2021 · pp. 1–9 Read article
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Characterization and Optimization of Neem Leaves and Moringa Seed Husk-based Composite Activated Carbon for Efficient Adsorption of Methylene Blue Dye
Abstract: The research in question was meticulously conducted within the premises of the Nigerian Liquefied Gas (NLG) Engineering laboratory, situated at the esteemed University of Maiduguri, Nigeria. This study focuses on the development and characterization of a composite material derived from neem leaves (NL) and Moringa seed husk (MSH) to adsorb methylene blue (MB) dye effluent. The synthesis process involved pyrolyzing MSH and NL at 400°C to produce MSH and NL …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 13, Issue 3, 2023 · pp. 12–22 Read article
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Effect of Alccofine and Tyre buffings on Engineering Properties of Sand
Abstract: In the present paper, the effect of alccofine and tyre buffings addition on the compression and bearing ratio of sand are evaluated through laboratory study. On the basis of compaction test, a reference mix composed of sand + 12 % alccofine + 2 % tire buffing was selected for further study. The unconfined compression and bearing ratio test on the reference mix was then carried out by curing the sample …
Published in Journal of Geotechnical Engineering · Vol. 7, Issue 1, 2020 · pp. 9–20 Read article
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Geotechnical study of a landslide reactivation in clay soils (central Piedmont, NW Italy).
Abstract: In March 2015, exceptional meteoric events occurred in southern Piedmont caused a remarkable rise of the rivers water level of the Tanaro Basin with flooding and many landslides. The engineering geological study reported here, concerns a triggering of a previous landslide occurred in 1982 in the hills, shaped in the marine sedimentary succession (Lugagnano Clay, lower Pliocene) of the southern Asti Reliefs, near San Martino Alfieri village. Detailed geological, morphological …
Published in Journal of Geotechnical Engineering · Vol. 7, Issue 1, 2020 · pp. 21–36 Read article
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Influence of Aeration and Curing on Shear Strength of Asphalt Stabilized Soil
Abstract: Asphalt stabilization technique is usually used to control and improve poor subgrade soil condition. The subgrade soil is the foundation for the roadway structure, its responsibility is to provide the required stability for the overlaying pavement and to limit the deformation due to traffic load repetitions by furnishing homogeneous stress distribution. In this work, the unconsolidated undrained Triaxial test was implemented for comparatively assessing the impact of asphalt stabilization on …
Published in Journal of Geotechnical Engineering · Vol. 6, Issue 2, 2019 · pp. 10–17 Read article
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A methodology for the determination of bearing capacity of granular soils with plate loading tests
Abstract: In granular soils, due to the inability to collect undisturbed samples of soil for geotechnical laboratory tests or the impracticality of carrying out dynamic penetration tests, highlights the necessity to find a useful approach in the engineering geological practice for the determination of bearing capacity. In these soils the determination of bearing capacity can be evaluated with several formula that necessary require the estimation of the friction angle: this leads …
Published in Journal of Geotechnical Engineering · Vol. 7, Issue 1, 2020 · pp. 1–8 Read article
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Influence of Combined Stabilization on the Structural Properties of Subgrade Soil
Abstract: Soil stabilization with liquid asphalt is considered as a sustainable step towards roadway construction on problematic subgrade soil, there are no requirements to import good quality materials or to implement energy consumption, but to mix the readily available soil with liquid asphalt through the cold mix technique. In this work, collapsible soil obtained from Nasiriya was mixed with asphalt emulsion, lime, and combinations of lime and asphalt emulsion (combined stabilization) …
Published in Journal of Geotechnical Engineering · Vol. 4, Issue 1, 2017 · pp. 13–24 Read article
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Comparing Consistency Limits of Black Cotton Soil with Cement Waste Dust and Wood Shaving Ash
Abstract: In the field of civil engineering, soil has to play a prime role right from planning a structure to the end of life of that structure. But some of the soils do not offer that service which a civil engineer wants to get. Shrinking in dry state and swelling in wet state, is the well-known proved proverb for black cotton soil. In Saurashtra, southern part of the zone has such …
Published in Journal of Geotechnical Engineering · Vol. 4, Issue 1, 2017 · pp. 31–35 Read article
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An Innovative Technique for Soil Improvement by Polythene Waste
Abstract: This study investigated the possibility of making use of polyethylene buying baggage waste to boost soils to pave way for its use in civil engineering projects together with in street bases, embankments and slope stabilisation. A chain of direct shear tests become undertaken on soil-plastic composites of decided on sandy soils: Klipheuwel and Cape residences sands. Strips of shredded plastic cloth had been used as reinforcement inclusions at concentrations of …
Published in Journal of Geotechnical Engineering · Vol. 3, Issue 2, 2016 · pp. 7–11 Read article
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CBR Behaviour of Soil Treated with Class ‘F’ Fly Ash
Abstract: Disposal of fly ash available at thermal power stations is not only a serious national issue but also causes endanger to the mankind if not properly utilized and handled. The study aims at making effective utilization of Class ‘F’ fly ash by mixing with soil in suitable proportions and showcasing its usage to be adopted in subgrade as well as subbase components in pavement infrastructures. Silty sand was mixed with …
Published in Journal of Geotechnical Engineering · Vol. 3, Issue 1, 2016 · pp. 33–43 Read article