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PENDAMPINGAN PEMBUATAN SITE PLAN KOMPLEKS EDUWISATA MUHAMMADIYAH PEJAWARAN BANJARNEGARA Pinta Astuti; Adhitya Yoga Purnama
Jurnal Pengabdian Masyarakat Multidisiplin Vol 5 No 3 (2022): Juni
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/jpm.v5i3.2432

Abstract

Istana Qur’an is a modern Muhammadiyah Islamic Boarding School in Sarwodadi Village, Pejawaran District, Banjarnegara, Central Java Province. The boarding school is one of the charities supported by the Pejawaran Muhammadiyah Branch (PCM Pejawaran), as a partner in this community service project. Based on its geographical location, the location of this Islamic boarding school is close to the Dieng tourist area, Banjarnegara so that it can be used as a buffer tourist destination in the Dieng area. In addition, there is no Muhammadiyah site that has been seriously developed into an edu-tourism area even though this Sarwodadi Village has potential, namely the existence of a developed Muhammadiyah Islamic boarding school. Therefore, the purpose of this community service activity is to empower partners in the form of assistance in the preparation of a Muhammadiyah edu-tourism site plan according to technical rules applicable in Indonesia and pay attention to land use and the environment for edu-tourism. Activities carried out in the form of aerial photo surveys with drone maps, Forum Group Discussions (FGD), and technical drawings using CAD-based programs. All activities went well and based on the results of the evaluation, this community service could increase the knowledge of partners from 10% to 100% after the completion of the edu-tourism site plan.
Geopolymer Bio-Patch Repair: Microbially-Induced Calcite and Pozzolanic Fly Ash and Rice Husk Ash for Corrosion-Resistant of Reinforced Concrete Repair Pinta Astuti; Angga Jordi Wisnu Nouvaldi; Aprilia Rahmayanti; Pramudya Surya Shabura; Muhammad Etandra Fara Adzani; Dylan Ataa Tsany; Adhitya Yoga Purnama; Rahmita Sari Rafdinal
Advance Sustainable Science Engineering and Technology Vol. 8 No. 1 (2026): November - January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i1.2729

Abstract

Indonesia’s archipelagic environment subjects concrete structures to severe corrosion and sulfate attacks, necessitating sustainable repair solutions. This study evaluates a geopolymer-based bio-patch repair mortar utilizing fly ash (FA), rice husk ash (RHA), and Bacillus subtilis bacteria to induce Microbially Induced Calcite Precipitation (MICP). While the silica-rich ashes act as pozzolanic materials, the bacteria enhance durability by reducing oxygen levels and lowering corrosion rates. Microscopic analysis confirmed the formation of calcium carbonate ($CaCO_3$) and calcium silicate hydrate (C-S-H), both of which significantly improve mechanical properties. The research identified an optimum mixture of 93% FA, 6% RHA, and 1% bacteria, which achieved a compressive strength of 30 MPa, a density of 2.32 g/cm³, and a low water absorption rate of 3.25%. These results meet standard performance requirements, demonstrating that this eco-friendly geopolymer-MICP system is a viable and innovative contribution to structural repair in aggressive environments.
Co-Authors Angga Jordi Wisnu Nouvaldi Aprilia Rahmayanti Astuti, Pinta Dylan Ataa Tsany Muhammad Etandra Fara Adzani Pinta Astuti Pramudya Surya Shabura Rahmita Sari Rafdinal