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All Journal Proceedings Series on Physical & Formal Sciences Jendela ASWAJA
Wajdi, Bina Arumbinang
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Mechanical Engineering Social Sciences

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Pengaruh Lamanya Perendaman Terhadap Absorpsi, Ketahanan Aus, dan Kuat Tekan Paving Block Wajdi, Bina Arumbinang; Mudiyono, Rachmat; Soedarsono, Soedarsono
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.849

Abstract

Paving blocks are considered advantageous over other road surfaces, and it is undeniable that paving blocks are an alternative road surface whose quality is still affected by water flooding. The objective of this study was to determine the effects of soaking time and age of paving blocks in terms of absorption, wear resistance, and compressive strength. The paving blocks used were manual (Holland) brick models obtained from Banyubiru and mechanical ones obtained from PT Pohon Cemara Semarang. The variations soaking times were 0, 12, 24, 36, 48 (hours) for 7, 14, 21, 28 (days) old pavers. The tests conducted were absorption, wear resistance, and compressive strength tests of paving blocks, carried out in the UNISSULA civil engineering laboratory. The results of absorption tests manual and machine paving block showed that value of the absorption test increased with increasing soaking time. The results of wear resistance of manual and machine pavers show that the untreated samples had a lower wear value and all test results met the requirements of SNI 03-0361-1996 Quality A. The maximum compressive strength of manual paving blocks at 28 days of age without treatment is 13.334 MPa. The maximum compressive strength of machine-made pavers is 25.297 MPa for paving blocks without immersion.
Analisis Dampak Sedimentasi Terhadap Kapasitas Tampung Waduk di Jawa Tengah Wajdi, Bina Arumbinang; Fitriyani, Ety; Istikomah, Hufa; Ismail, Abdul Fida
Jurnal Jembatan Efektivitas Ilmu dan Akhlak Ahlussunah Wal Jama'ah Vol 6 No 3 (2025): September
Publisher : LPPM UNU CIREBON

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52188/jendelaaswaja.v6i3.1753

Abstract

Reservoirs play a strategic role in supporting water security, providing raw water, agricultural irrigation, and flood control in Central Java. However, over the past two decades, sedimentation has become one of the most serious problems threatening the sustainability of reservoir functions. The accumulation of sediments on the reservoir bed gradually decreases storage capacity and reduces operational effectiveness, particularly during the dry season when water demand increases. This study aims to comprehensively examine the impact of sedimentation on reservoir storage capacity through literature analysis and secondary case studies. The method employed is a systematic literature review with a comparative analysis approach of several major reservoirs in Central Java, namely Wadaslintang, Kedungombo, Sempor, and Mrica. Secondary data were obtained from previous research, official reports from the River Basin Agency (BBWS), and national scientific publications. The results show that high sedimentation rates have reduced the effective storage capacity of reservoirs by 15-40 percent of their initial capacity. The main contributing factors include soil erosion in catchment areas, land-use changes, and limited maintenance activities. Therefore, an integrated sediment management strategy is required, combining technical measures such as dredging and sabo dams with non-technical approaches based on land conservation and community participation. This study is expected to serve as a reference for sustainable reservoir management planning in Central Java.
Co-Authors Fitriyani, Ety Ismail, Abdul Fida Istikomah, Hufa Rachmat Mudiyono, Rachmat Soedarsono Soedarsono