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309 articles for “Compression”
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Analysis and Overhauling of Two Stage Reciprocating Air Compressor of a Conventional Locomotive-A Case Study
Abstract: Abstract- Reciprocating air compressor is the most widely used type of compressor found in many industrial applications and is a crucial machine in gas transmission pipelines, petrochemical plants, refineries, etc. Due to high pressure ratio requirements, reciprocating air compressor is commonly used in locomotives. After a period of life unexpected failures of internal components due to miscellaneous reasons occur, which affects the operating system performance. This paper presents a case …
Published in International Journal of I.C. Engines and Gas Turbines · Vol. 1, Issue 2, 2015 · pp. 39–53 Read article
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Performance Analysis of High-Volume Fly Ash and Recycled Aggregate in M50 Concrete: Workability and Compressive Strength
Abstract: Abstract This study evaluates the impact of recycled aggregate (RA) and high-volume fly ash (HVFA) on the workability and compressive strength of M50 grade concrete. Slump tests were conducted for various water-cement ratios, using a mix ratio of 1:0.69:2.29 and a high-range water reducer. The compressive strength of concrete mixtures incorporating varying percentages of RA and FA was measured at 7, 28, and 90 days. Results indicate that replacing natural …
Published in International Journal of Concrete Technology · Vol. 10, Issue 2, 2024 · pp. 25–32 Read article
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Impact of Sugarcane Molasses on Compressive Strength and Workability
Abstract: Molasses used as admixture increase the workability, it is a by-product of sugar industry. In this study, mechanical property such as compressive strength and workability of concrete adding fly ash and sugarcane molasses has been investigated. Adding the molasses in concrete increase the compressive strength, delay the initial and final setting time, reduced the bleeding and segregation of concrete and decrease the W/C ratio. The compressive strength test results showed …
Published in International Journal of Construction Engineering and Planning · Vol. 6, Issue 1, 2020 · pp. 1–5 Read article
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Performance Calculation of a Gas Plant Compressor Unit
Abstract: This research was centered on calculating the performance of a gas plant compressor unit which was achieved using Tunu Booster Station facility. The results shows that the ability of the compressor, isentropic efficiency and coefficient of performance of the compressor gave values of 33899kw, 0.83 and 1.2. The deviations from the existing plant values were 35.6%, 31.7% and 20% respectively. Other parameters that were considered and evaluated include the failure …
Published in International Journal of Polymer Science and Engineering · Vol. 8, Issue 2, 2022 · pp. 13–24 Read article
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Comparison Between Electrical Stimulation and Intermittent Pneumatic Compression to Reduce Incidence of Deep Vein Thrombosis in High-risk Critically lll Patients
Abstract: Background: Prevention of deep vein thrombosis (DVT) is an effective way to reduce morbidity and death among critically ill patients in intensive care units (ICUs). Electrical stimulation and intermittent pneumatic compression are alternative preventive strategies of preventing DVT through decreasing the degree of lower limb edema and muscle weakness in ICU. Purpose of the Study: To compare the electrical stimulation and intermittent pneumatic compression as a preventive strategy to reduce …
Published in International Journal of Nursing Critical Care · Vol. 9, Issue 2, 2023 · pp. 26–40 Read article
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Assessment of M30 Concrete Compressive Strength Using Digital Rebound Hammer and Destructive Testing
Abstract: Abstract The assessment of in-situ concrete strength using non-destructive testing (NDT) techniques hasbecome increasingly important for quality assurance, structural evaluation, and conditionassessment of concrete infrastructure. Among the available NDT methods, the digital reboundhammer offers a rapid, economical, and non-destructive means of estimating concretecompressive strength. This study experimentally investigates the correlation between reboundnumbers obtained from a digital rebound hammer and the compressive strength of M30 gradeconcrete determined using a Compression Testing …
Published in International Journal of Structural Engineering and Analysis · Vol. 12, Issue 2, 2026 Read article
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Enhancing Compressive Strength of Geopolymer Concrete with Micro and Macro Steel Fibers: A Study on Fiber-Reinforced Geopolymers
Abstract: AbstractThis research investigates the impact of micro and macro steel fibers on the compressive strength ofgeopolymer concrete (GPC). The study utilizes locally sourced materials, including river sand,granite aggregates, fly ash, and ground granulated blast furnace slag (GGBS) in a 50:50 ratio asalumino-silicate materials. Sodium hydroxide (NaOH) and sodium silicate (Na₂SiO₃) were employedas activators, with the addition of a superplasticizer (Conplast SP430) to enhance workability. FourGPC mixes were analyzed: GPC without …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 10, Issue 2, 2024 · pp. 15–20 Read article
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Comparative Design and Performance Analysis of Axial Flow Compressor Blades Using Various Materials
Abstract: This study presents a comprehensive design and performance analysis of axial flow compressor blades using various materials to improve efficiency, durability, and performance. Axial flow compressors are critical components in aircraft engines and industrial gas turbines, and the choice of blade material significantly impacts their functionality under extreme operational conditions. The analysis explores several materials, including traditional alloys, advanced composites, and high-temperature resistant metals, evaluating their mechanical properties, thermal stability, …
Published in International Journal of Mechanics and Design · Vol. 10, Issue 2, 2024 · pp. 7–15 Read article
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Influence of Recycled Aggregate and Steel Fiber on the Compressive Strength of Concrete: A Comparative Study of NAC and RAC Mixes
Abstract: Abstract This study evaluates the impact of varying proportions of recycled concrete aggregate (RCA) and steel fiber content on the compressive strength of concrete mixes. Five concrete mixes were prepared with different percentages of RCA (0%, 25%, 50%, 75%, and 100%), using a constant water-to-cement ratio (w/c) of 0.55. Additionally, each mix included variations with 1% and 2% steel fiber by volume, corresponding to 78.5 kg/m³ and 157 kg/m³, respectively. …
Published in International Journal of Concrete Technology · Vol. 10, Issue 2, 2024 · pp. 11–16 Read article
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MATHEMATICAL MODELING OF FLY ASH AND ALCCOFINE PARTIAL REPLACEMENTS OF CEMENT FOR HIGH COMPRESSIVE CONCRETE STRENGTH
Abstract: Mathematical model was applied to monitor the behaviour of partial replacement of cement with alccofine and flyash, alccofine and fly ash was applied to monitor the variation of strength development in different mixed designed, the study applying such concept has observed these two material to generated high strength development more than the normal strength generated applying cement in full dosage, the detailed sources of these substance such as micro finer …
Published in International Journal of Sustainable Building Technology · Vol. 3, Issue 2, 2020 · pp. 38–56 Read article
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Optimization of Compressive Strength of Snail Shell Ash Blended Cement Concrete
Abstract: In this paper, a mathematical model is developed to optimize the compressive strength and the corresponding values of the mixture proportions of snail shell ash blended cement concrete using Scheffe’s regression method.A computer program written in qbasic language was invoked to quicken the selection of the cheapest mix ratios and the corresponding value of compressive strength of concrete. The mix ratio that optimized the compressive strength was found to be …
Published in International Journal of Construction Engineering and Planning · Vol. 6, Issue 2, 2020 · pp. 29–37 Read article
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Performance of Metakaolin and GGBS-induced Geopolymer Concrete Under Compression
Abstract: Metakaolin and ground granulated blast furnace slag (GGBS) were used as the source materials to obtain the high strength geopolymer concrete. NaOH and sodium silicate were used as alkaline activators with varying NaOH molarities of 8M, 12M, 14M and 16M. Cubes of size (100x100x100) mm were cast and the four geopolymer mixes were heat cured for varying durations of 24 hours, 48 hours and 72 hours and tested for compressive …
Published in International Journal of Concrete Technology · Vol. 3, Issue 2, 2017 · pp. 31–38 Read article
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Empirical Model Relativity of Flexural and Compressive Strength of Concrete Produced with Foundry Waste Sand as Partial Replacement
Abstract: The evaluation presented in this research is to establish the correlation between compressive strength of concrete and flexural strength of concrete of grade 20 at mix ratio of 1:2:4 produced using foundry waste sand as a partial replacement for river sand at different replacement level of 0%, 5%, 10%, 15%, 20% and 25%. The aimed compressive strength was achieved at 15% replacement and the corresponding flexural strength of 3.14 N/mm2was …
Published in International Journal of Concrete Technology · Vol. 4, Issue 1, 2018 · pp. 5–10 Read article
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Modeling 28 Days’ Curing Compressive Strength of Concrete Partially Replaced with Palm Kernel Shell as Aggregate Influenced by Porosity
Abstract: Twenty-eight days of curing to determine compressive strength of concrete were carried out throughthe application of modeling and simulation. The development of concrete compressive strength wascarried out by integrating palm kernel shell (PKS) as partial replacement for aggregate. Studies weremonitored to determine its rates of strength development by partially replacing PKS at differentpercentage of 5%, 10%, 15%, 20%, and 25% to determine the optimum compressive strength withinthe applied percentage of …
Published in International Journal of Concrete Technology · Vol. 9, Issue 2, 2023 · pp. 26–40 Read article
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Optimization of Compressive Strength of Segmental Interlocking Stones
Abstract: The failure of most segmental interlocking stones used as pavement materials is traceable to lack of knowledge of the mix ratios that would optimize the compressive strength of the end products. In this study, the compressive strength was optimized based on Scheffe’s simplex lattice approach. The reliability of model developed was investigated using F-statistic and was found to be adequate. A computer program written in basic language was used to …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 4, Issue 2, 2018 · pp. 1–7 Read article
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A Review on Hybrid Honeycomb Engine Mounts for Vibration Isolation in Variable Compression Ratio Engines
Abstract: The increasing sophistication of modern engine systems has highlighted the importance of advanced vibration control methods. Engines today are required to function under continuously changing operating conditions, particularly in Variable Compression Ratio (VCR) systems, where vibration behavior becomes highly complex, non-linear, and dependent on time. Under such circumstances, conventional engine mounts often struggle to deliver stable and consistent performance. In contrast, hybrid honeycomb structures offer significant advantages due to their …
Published in International Journal of I.C. Engines and Gas Turbines · Vol. 12, Issue 1, 2026 · pp. 29–34 Read article
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Multiple Regression Analysis of Compressive, Flexural, and Split Tensile Strength in M40 Grade Concrete
Abstract: Concrete plays a key role as a construction material across the globe. The strength parameters of the concrete are primary reason for which it is designed for. The design mixed concrete has multiple strength parameters like compressive strength, spilt tensile strength, flexural (bending) strength etc. For each newly design mixed concrete, the mentioned strength parameters are tested for various time duration like 3 days, 7 days, 14 days, 28 days …
Published in International Journal of Construction Engineering and Planning · Vol. 11, Issue 2, 2025 · pp. 20–34 Read article
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Influence of GGBFS Content and Curing Methods on the Compressive Strength of Coconut Shell Concrete: A Mix Design Approach for Sustainable Construction
Abstract: AbstractThis study explores the development of a coconut shell concrete (CSC) mix design using theACI211.298 guidelines, targeting a compressive strength of 20 MPa for structural applications. Dueto the organic and flaky properties of coconut shell (CS), achieving the initial target strength of 40MPa was challenging, necessitating a focus on optimizing mix proportions for a 20 MPa goal. Theresearch investigates three different mixes with varying percentages of ground granulated blastfurnace slag …
Published in International Journal of Structural Engineering and Analysis · Vol. 10, Issue 2, 2024 · pp. 9–14 Read article
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Comparison of Some Mobile Air Compressor Components Operating in a Gas Plant Facility
Abstract: Investigation on some components of the Mobile Air Compressor (MAC) was considered in terms of the concepts of reliability and the components compared are valve, filter, radiator unit and air hose. The research reveals that failure of any of the component investigated influences the operation of the mobile air compressor in gas plant facility. The research further revealed that failure of radiator resulting from overheating in most cases, influences the …
Published in International Journal of Chemical Engineering and Processing · Vol. 9, Issue 1, 2023 · pp. 31–40 Read article
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Monitoring the Operation of Mobile Air Compressor Component of Filters Using Reliability Analysis Concepts
Abstract: The performance of filter component was monitored in a mobile air compressor operating in a gas plant facility located in Rivers State. The investigation covers the monitoring of the numbers of failure, downtime, and computation failure rate, mean time between failure, reliability, unreliability, availability and unavailability. In this study, it was experienced that the failures occur due to over usage as well as presence of particles in the cooling fluid …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 9, Issue 1, 2023 · pp. 18–22 Read article