Acceleration: Multidisciplinary Research Journal
Journal Title : ACCELERATION: Multidisciplinary Research Journal Initial : AMRJ Grade : (on progress) Frequency : 4 issues per year (March, June, September and December) DOI : 10.70210 Printed ISSN : 3026-0159 Online ISSN : 2986-9269 Publisher : PT Akselerasi Karya Mandiri Cit. Analysis : Google Scholar Indexing : Google Scholar, ICI Copernicus, Garuda, Dimension, Crossref, etc. Journal Sponsors and Partners:
Experimental Test of Flexural Strength of Green Concrete Using 0%, 10%, 30% Waste Tire Rubber Powder as a Substitute for Fine Aggregate
The increasing demand for sustainable construction has driven the development of green concrete incorporating recycled waste materials. This study investigates the flexural strength of concrete partially substituting fine aggregate with waste tire rubber powder at 0%, 10%, and 30% replacement levels. Concrete beams measuring 150 mm × 150 mm × 600 mm were cast and tested at 28 days using third-point loading in accordance with ASTM C78. The experimental results show that the 10% rubber powder mix achieved the highest flexural strength, with a 52.5% increase compared to the control. In contrast, the 30% mix exhibited a moderate reduction in strength. Despite the slight decline at higher replacement levels, all mixes retained acceptable structural performance and workability without chemical admixtures. The findings suggest that partial substitution of fine aggregate with rubber powder up to 10% can enhance flexural behavior while promoting environmentally friendly concrete solutions.
Copyright (c) 2025 Guntur Nugroho https://creativecommons.org/licenses/by/4.0
ENHANCING EFL READING COMPREHENSION SKILLS THROUGH PROBLEM-BASED LEARNING: EVIDENCE FROM STUDENT ENGAGEMENT AND STRATEGY USE
Reading comprehension remains one of the most essential yet challenging skills for English as a Foreign Language (EFL) learners. Traditional reading instruction often emphasizes teacher-centered approaches that limit students’ active involvement in meaning-making. This study investigates the impact of Problem-Based Learning (PBL) on enhancing EFL students’ reading comprehension skills, engagement, and strategy use. A quasi-experimental design was employed with two groups of undergraduate EFL learners: an experimental group (n = 35) receiving PBL-based reading instruction and a control group (n = 35) taught through traditional teacher-led methods. Data were collected using a reading comprehension test, an engagement questionnaire, and a reading strategies inventory. Results revealed that the PBL group achieved significantly higher post-test scores than the control group, indicating improved reading comprehension performance. Moreover, PBL fostered greater behavioral, emotional, and cognitive engagement, alongside the increased use of higher-order reading strategies such as inferencing, summarizing, and critical questioning. These findings suggest that PBL provides a more interactive and meaningful framework for teaching reading, enabling learners to become active participants in constructing textual meaning. The study highlights pedagogical implications for EFL educators, recommending the integration of real-world problems into reading instruction to enhance comprehension outcomes.
Copyright (c) 2025 Abdul Ayiz, Kurniawan Yudhi Nugroho https://creativecommons.org/licenses/by/4.0
METAPHORICAL EXPRESSIONS OF BANANA NAMES IN JAVANESE LANGUAGE
Plant naming in Javanese culture is not merely descriptive but is laden with metaphorical meaning that reflects cultural values and collective cognition. This study aims to uncover the cognitive processes behind the use of metaphors in the names of banana varieties (gêdhang) in the Javanese language. The research method employed is descriptive qualitative, with data collected through documentation of the Javanese dictionary, observation, and interviews with local informants. Data analysis was conducted using a referential approach and a reflective-introspective method to identify the source domains, target domains, and conceptual structure of the metaphors. The results show that the metaphors in banana names take the form of idiomatic phrases, with loci based on construction attributes. Source domains include place, beauty, small things, position, and spirit beings, while target domains involve flavor, color, texture, seeds, and the number of fruits. The discussion highlights how language reflects local wisdom and cultural values, and how metaphors function conceptually in organizing human experiences. This study enriches conceptual metaphor theory and opens avenues for further exploration in other ethnobotanical lexicons.
Copyright (c) 2025 Arini Hidayah, I Dewa Putu Wijana, Hendrokumoro https://creativecommons.org/licenses/by/4.0