Roslan Hashim, Roslan
University of Malaya Kuala Lumpur,Malaysia.

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A New Formula For Rate Of Swelling Of Expansive Clay Soils Muntohar, Agus Setyo; Hashim, Roslan
Jurnal Semesta Teknika Vol 8, No 2 (2005): NOVEMBER 2005
Publisher : Jurnal Semesta Teknika

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Abstract

The study of engineered expansive soils attracts the attention of researchers since this soil is mixed and increasingly used in many geotechnical and geoenvironmental application. This paper attempts to the study of swelling properties i.e. swell and swelling pressure, rate of swell, and water adsorption during swell. The kaolin-bentonite mix and sand-bentonite mix specimens are statically compacted and tested in conventional oedometer apparatus for swelling determination. The results of the study show that the mechanism of swell follows three distinct stages: intervoid, primary, and secondary swelling. The swell occurs since the soils adsorb water during water uptake. The rate of swell and maximum swelling are successfully determined using hyperbolic equation.
A New Formula For Rate Of Swelling Of Expansive Clay Soils Muntohar, Agus Setyo; Hashim, Roslan
Semesta Teknika Vol 8, No 2 (2005): NOVEMBER 2005
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v8i2.897

Abstract

The study of engineered expansive soils attracts the attention of researchers since this soil is mixed and increasingly used in many geotechnical and geoenvironmental application. This paper attempts to the study of swelling properties i.e. swell and swelling pressure, rate of swell, and water adsorption during swell. The kaolin-bentonite mix and sand-bentonite mix specimens are statically compacted and tested in conventional oedometer apparatus for swelling determination. The results of the study show that the mechanism of swell follows three distinct stages: intervoid, primary, and secondary swelling. The swell occurs since the soils adsorb water during water uptake. The rate of swell and maximum swelling are successfully determined using hyperbolic equation.
The Strategic Role of Teacher Communication in Shaping a Learning Environment that Promotes Student Learning Motivation: A Qualitative Study Fadillah, Zikry Indra; Hashim, Roslan; Aini, Sharifah
Journal Sains and Education Vol. 3 No. 02 (2025): JSE : Journal Sains and Education
Publisher : Saba Jaya Publisher

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Abstract

This research delves into the pivotal role of teacher educational communication in shaping the learning environment and influencing student learning motivation. Through a descriptive research approach employing qualitative methods, observations, interviews, and documentation were utilized for data collection. The results indicate that teachers significantly influence student learning motivation through their presence, guidance, and encouragement, fostering conducive learning atmospheres. Effective communication strategies tailored to individual student needs, incorporating interactive techniques, and integrating technology were found to enhance student engagement and interest in learning. Moreover, collaborative efforts between teachers, parents, and the broader community contribute to a supportive learning environment, nurturing students' academic and personal growth. The study underscores the importance of teacher educational communication in shaping the learning environment, fostering positive relationships, and motivating students to achieve their full potential, thereby empowering them to succeed academically and thrive personally.