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All Journal Jurnal Pengabdian Magister Pendidikan IPA Jurnal Konstruksi Jurnal Atma Inovasia
Hariyadi
Universitas Mataram
Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Environmental Science Social Sciences Other

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Preplaced Lightweight Aggregate Concrete (PLWAC) Dengan Bahan Agregat Kasar Batu Apung dan Fly Ash Sebagai Agregat Halus Adhika Raffi Athallarizq; Ngudiyono; Akmaluddin; Buan Anshari; Hariyadi; Ni Nyoman Kencanawati; Tri Sulistyowati
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.3444

Abstract

Concrete is a composite material widely used because it has high compressive strength; however, it has a weakness in the form of high density. Lightweight concrete innovation such as Preplaced Lightweight Aggregate Concrete (PLWAC) offers a solution, using a method in which lightweight aggregate is first placed into the mold and then filled with grouting material, which is expected to reduce density. This study uses pumice stone as coarse aggregate and fly ash as fine aggregate. The purpose of this study is to analyze the effect of variations in the cement-to-fly ash ratio on the flowability and compressive strength of the grouting material, as well as to evaluate the mechanical properties (compressive strength, splitting tensile strength, and flexural strength) and physical properties (density and water absorption) of PLWAC. The grouting material used variations of cement-to-fly ash ratios of 1:0.5, 1:1, 1:1.5, and 1:2. The grouting method was carried out using manual pumping into molds that had been filled with pumice aggregate. The specimens consisted of 12 cubes measuring 50 mm × 50 mm × 50 mm for grouting material compressive strength testing, 28 cylinders measuring 150 mm × 150 mm for compressive strength, splitting tensile strength, and absorption tests, and 12 beams measuring 150 mm × 150 mm × 530 mm for PLWAC flexural strength testing. The test results at 56 days show that increasing the fly ash content caused a decrease in mechanical properties. The highest compressive strength of the grouting material was 28.64 MPa at a ratio of 1:0.5. Meanwhile, PLWAC achieved the highest compressive strength of 6.22 MPa, splitting tensile strength of 1.27 MPa, and flexural strength of 1.28 MPa. The lowest PLWAC density was obtained in the cement-to-fly ash composition of 1:2, at 1,388.3 kg/m³, with water absorption of 28.79 percent.
Konstruksi Bangunan Sederhana dan Tahan Gempa SDN 7 Sape Kabupaten Bima Dewandha Mas Agastya; Fera Fitri Salsabila; Nyoman Merdana; Pathurahman; Evrianti Syntia Dewi; Hariyadi; Ni Nyoman Kencanawati
Jurnal Atma Inovasia Vol. 6 No. 4 (2026)
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jai.v6i4.14234

Abstract

Bima Regency is an area with significant earthquake risk, making the application of earthquake – resistant construction principles in educational facilities essential. However, the understanding of construction workers and the local community regarding technical standards for earthquake – resistant buildings is still limited. This community service activity aimed to improve knowledge and implementation of simple earthquake – resistant construction principles in school facility development at SD Negeri 7 Sape, Bima Regency. The methods included socialization activities on the technical requirements of earthquake – resistant buildings followed by direct supervision and assistance during construction work. The materials delivered covered building material quality, structural dimensions and elements, structural connections, and construction workmanship quality. The results showed an improvement in workers and community members understanding of earthquake – resistant construction principles and better application of structural details, such as proper stirrup spacing, adequate concrete cover, and the use of 135˚ stirrup hooks. The activity also increased awareness regarding the importance of material quality and accuracy in construction work. Therefore, this community service program contributes positively to improving the quality of simple earthquake – resistant buildings and supports disaster risk education efforts in educational facilities.
Sosialisasi Implementasi Konsep Green Building Pada Rumah Hunian Bagi Siswa SMK di Kota Mataram M Khairul Zahidi; Hariyadi; Hartana; Ida Ayu Oka Suwati Sideman
Jurnal Pengabdian Magister Pendidikan IPA Vol 9 No 1 (2026): Januari - Maret 2026
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v9i1.14773

Abstract

The knowledge gap in sustainable building design exists in the vocational high school (SMK) education system, where the curriculum still focuses on traditional methods rather than sustainability principles. This initiative addresses the lack of sustainable design knowledge among vocational students in Mataram by teaching the basics of green residential planning, with a focus on passive cooling and the selection of environmentally friendly materials. The program was delivered through face-to-face lectures, followed by evaluation using pre- and post-intervention questionnaires. The activity utilized face-to-face lectures, which were then evaluated using pre- and post-socialization questionnaires. The comparative evaluation results showed a significant increase in understanding; for example, fundamental green building literacy increased from 12.5% ​​to 71.4%, and students' readiness to design energy-efficient residential buildings jumped from 50% to 85.7%.
Co-Authors Adhika Raffi Athallarizq Akmaluddin Buan Anshari Dewandha Mas Agastya Evrianti Syntia Dewi Fera Fitri Salsabila Hartana Ida Ayu Oka Suwati Sideman M Khairul Zahidi Ngudiyono Ni Nyoman Kencanawati Nyoman Merdana Pathurahman Tri Sulistyowati