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A Circular Economy Approach: Total Elimination of Extreme Swelling in Expansive Clay Using Pyrolytic Carbon Black and Fly Ash Hasrullah, Hasrullah; Mansur, Achmad Zultan
Journal of Educational Technology and Learning Creativity Vol. 3 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jetlc.v3i2.2342

Abstract

Purpose of the study: To rigorously investigate and quantify the effectiveness of a novel, synergistic stabilizer composed of Pyrolytic Carbon Black (PCB) and Fly Ash in totally eliminating extreme swelling potential in highly problematic expansive clay soil. Methodology: The comprehensive methodology included initial characterization, Modified Proctor compaction, One-Dimensional Swelling tests, Unconfined Compressive Strength (UCS) tests, and California Bearing Ratio (CBR) tests. Expansive clay was treated with a combined stabilizer dosage up to 25% (15% PCB and 10% Fly Ash) and cured for 28 days. Main Findings: The stabilizer significantly enhanced compaction characteristics, increasing the Maximum Dry Density (MDD) from 1.62 g/cm3 to 2.18 g/cm3. Crucially, the extreme Free Swell Index (FSI) of 120.23% was totally eliminated (swelling reduced to 0%). Mechanical strength improved dramatically: UCS increased from 0.12 kg/cm2 to 1.98 kg/cm2 , and unsoaked CBR enhanced from 2.48% to 10.18%. Novelty/Originality of this study: This research provides the first conclusive quantitative evidence of total swelling elimination in expansive clay using this specific PCB and Fly Ash sustainable blend. It advances knowledge by bridging geotechnical science, green engineering, and the circular economy, demonstrating a viable, cost-effective solution utilizing two major waste streams (tires and coal ash) for critical infrastructure subgrades.
A Circular Economy Approach: Total Elimination of Extreme Swelling in Expansive Clay Using Pyrolytic Carbon Black and Fly Ash Hasrullah, Hasrullah; Mansur, Achmad Zultan
Journal of Educational Technology and Learning Creativity Vol. 3 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jetlc.v3i2.2342

Abstract

Purpose of the study: To rigorously investigate and quantify the effectiveness of a novel, synergistic stabilizer composed of Pyrolytic Carbon Black (PCB) and Fly Ash in totally eliminating extreme swelling potential in highly problematic expansive clay soil. Methodology: The comprehensive methodology included initial characterization, Modified Proctor compaction, One-Dimensional Swelling tests, Unconfined Compressive Strength (UCS) tests, and California Bearing Ratio (CBR) tests. Expansive clay was treated with a combined stabilizer dosage up to 25% (15% PCB and 10% Fly Ash) and cured for 28 days. Main Findings: The stabilizer significantly enhanced compaction characteristics, increasing the Maximum Dry Density (MDD) from 1.62 g/cm3 to 2.18 g/cm3. Crucially, the extreme Free Swell Index (FSI) of 120.23% was totally eliminated (swelling reduced to 0%). Mechanical strength improved dramatically: UCS increased from 0.12 kg/cm2 to 1.98 kg/cm2 , and unsoaked CBR enhanced from 2.48% to 10.18%. Novelty/Originality of this study: This research provides the first conclusive quantitative evidence of total swelling elimination in expansive clay using this specific PCB and Fly Ash sustainable blend. It advances knowledge by bridging geotechnical science, green engineering, and the circular economy, demonstrating a viable, cost-effective solution utilizing two major waste streams (tires and coal ash) for critical infrastructure subgrades.
Computational Propaganda In The 2024 Presidential Election Contestation Of The Republic Of Indonesia In The Diversion Of Public Opinion On Social Media Arnus, Sri Hadijah; Hasrullah, Hasrullah; Cangara, Hafied; Sukri, Sukri
Samarah: Jurnal Hukum Keluarga dan Hukum Islam Vol. 10 No. 1 (2026): Samarah: Jurnal Hukum Keluarga dan Hukum Islam
Publisher : Islamic Family Law Department, Sharia and Law Faculty, Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/sjhk.v10.i1.28080

Abstract

Computation propaganda which is aimed at diverting public opinion, is widely used in the world of politics in the current era of digital democracy. One of the effects of use computation propaganda namely the polarization of public opinion on social media. This needs to be a concern, especially in Indonesia which has a pluralistic society. This research wants to find out how computational propaganda strategies are used in the 2024 presidential election of the Republic of Indonesia. This research uses a qualitative descriptive method. The research data is the result of Social Network Analysis (SNA) on conversations about the 2024 presidential election which became a trending topic on Twitter/X social media. The analysis was carried out by Drone Emprit Academic, the data from the analysis was then interpreted by researchers. The results of the research show that the 02 Prabowo/Gibran candidate pair used a computational propaganda strategy in building and guiding public opinion about the pair. This can be seen on the SNA map where the sub-clusters are formed separately from the main cluster, creating a network mesh  network and post many to many This is a characteristic of a bot account. The narrative built by the network has a positive sentiment towards couple 02. The use of bots by one of the couples has the potential to create polarization of public opinion regarding the 2024 presidential election on social media. The use of computational propaganda has become unavoidable in today's rapidly developing technological era. Therefore, there is a need for understanding from an ethical perspective in using it and there is a need to increase political literacy and digital literacy for the community regarding this matter.