https://ph04.tci-thaijo.org/index.php/SUJST <p>The journal aims to provide a medium for the dissemination of advances in engineering, science, agricultural technology, medicine and public health, and related technology. All contributions that have not been published in other journals, reports, proceedings or other types of publications are welcomed. Contributions are accepted only in English and may be research papers, short communications, or review articles. </p> <p>Continuing efforts have been made by the editorial board members to maintain the high quality of the journal by single-blind peer-review in careful and fair manner. A special attention has been focused therefore on the novelty and readers' benefit together with practical applicability if necessary. All the accepted manuscripts are edited by a specialist who is a native and professionally-educated English speaker.</p> Institute of Research and Development en-US Suranaree Journal of Science and Technology 0858-849X https://ph04.tci-thaijo.org/index.php/SUJST/article/view/11488 <p>In this work we examine about sugarcane bagasse ash which satisfactory for producing Eco-friendly Ultra-High Performance Concrete (EFUHPC) and improving mechanical properties of EFUHPC. In UHPC more amount cement and other materials used which produce hug amount of CO₂, there are major problem for environment.&nbsp; Very less study found on use of SBA in EFUHPC hence we studied for effect of sugarcane bagasse ash on UHPC and futuristic use for EFUHPC. In this work Sugarcane Bagasse Ash by weight of cement used to 0%, 5%, 10%, 15% and 20% and workability, flexural strength, compressive strength and water absorption are investigated. The result show that mixture using 10% amount of SBA has optimum mechanical strength and water absorption decreased when SBA increased.</p> Devendra Kumar Sharma Imran Ahmad Khan Copyright (c) 2026 Devendra Kumar Sharma, Imran Ahmad Khan http://creativecommons.org/licenses/by-nc-nd/4.0 2026-09-02 2026-09-02 33 5 010452(1 6) 10.55766/sujst11488 https://ph04.tci-thaijo.org/index.php/SUJST/article/view/11530 <p>Performance characteristics and emissions parameters of a Kirloskar diesel engine having single-cylinder compression ignition (CI) with direct injection (DI), water-cooled, running at 1500 rpm with variable load were tested in the blending percentage of Karanja methyl esters (KME) B10, B20, and B30 with diesel, the biodiesel made from Karanja oil, along with pure diesel. An experimental Taguchi L16 matrix is prepared for the analysis of performance, combustion, and emissions characteristics of the engine mentioned above with 3-hole, 4-hole, 5-hole, and 6-hole injection systems. Two hybrid methods are used for the optimization of engine parameters first one is the combination of Principal Component Analysis (PCA) and Utility method, and the other one is the combination of Criteria Importance through Criteria Inter-Correlation (CRITIC) and Utility method. The optimal factor level for higher brake thermal efficiency (BTE), lower brake-specific fuel consumption, and lower engine emission in blending conditions is achieved by having a fuel injector with a 6-hole nozzle in combination with a B20 blending condition at 60% loading condition. This optimal level condition provides higher BTE, lower SFC, and lower engine emissions compared to other conditions.</p> Vishnu Singh Vikas Kumar Choubey Vikas Upadhyay Copyright (c) 2026 Vishnu Singh, Vikas Kumar Choubey, Vikas Upadhyay http://creativecommons.org/licenses/by-nc-nd/4.0 2026-09-02 2026-09-02 33 5 010451(1 17) 10.55766/sujst11530