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All Journal Jurnal Pengabdian kepada Masyarakat Advance Sustainable Science, Engineering and Technology (ASSET)
Purwanto
Universitas Semarang
Agriculture, Biological Sciences & Forestry Humanities Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Public Health Social Sciences Other

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PELATIHAN SOFTWARE COMFAA BAGI MAHASISWA TEKNIK SIPIL DI KOTA SEMARANG Agus Muldiyanto; Mudjiastuti Handajani; Adolf Situmorang; Purwanto
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 2: Juli 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jabdi.v2i2.2658

Abstract

Technological developments really help a civil engineering graduate in designing in the civil engineering field. There are a lot of software that can be used to design runway pavement thicknesses, one of them is COMFAA. In this service activity, the service team conducted training about the calculation of the runway pavement thickness at the airport using COMFAA software for civil engineering students and construction workers. The purposes of this service activity are to give deep understanding about the design of pavement layers on airport runways, to develop knowledge in pavement thickness designs, and to enhance the engineering student’s competence in using COMFAA to plan airport pavement layers. The implementation of this service was carried out in Semarang for Civil Engineering students and Construction Actors. The result was an understanding enhancement of runway pavement analysis from 0% to 77%.
Optimization of Coconut Fiber and Styrofoam Composition in Concrete to Improve Strength and Sound Absorption Purwanto; Ferry Firmawan; Fahrudin Ahmad; Hani Purwanti; Aimmatul Husna; Nadirah Darus; Zaiton Haron; Khairulzan Yahya
Advance Sustainable Science Engineering and Technology Vol. 8 No. 2 (2026): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i2.2752

Abstract

This study aimed to evaluate the effect of coconut husk and Expanded Polystyrene (EPS) composition on the mechanical and acoustic properties of lightweight concrete. The research was conducted experimentally using a two-way factorial design with coconut husk variations of 0%, 0.5%, 1%, 1.5%, and 2% of cement weight and EPS variations of 0%, 10%, 20%, and 30% of coarse aggregate volume. A total of 20 mix variations (5 coir levels × 4 EPS levels) were prepared with three replications for each test, resulting in 120 specimens. Compressive strength was tested at 7 days following ASTM C39, while sound absorption was measured at frequencies of 100–2000 Hz based on ISO 10534-2. The results showed that the addition of coconut husk up to 1% improved compressive strength through fibre reinforcement, whereas increasing EPS content enhanced sound absorption due to higher porosity but reduced mechanical strength. Statistical analysis using ANOVA (R² = 0.94, p < 0.05) and desirability optimisation identified the optimal composition at 1% coconut husk and 10% EPS. The developed lightweight concrete is suitable for non-structural building components requiring improved acoustic performance and reduced weight.
Co-Authors Adolf Situmorang Agus Muldiyanto, Agus Aimmatul Husna Fahrudin Ahmad Ferry Firmawan Khairulzan Yahya Mudjiastuti Handajani Nadirah Darus Purwanti, Hani Zaiton Haron