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Beton Hijau Menggunakan Fly ash sebagai Subtitusi Parsial Semen

ANALISIS KARAKTERISTIK MARSHALL CAMPURAN AC-WC MENGGUNAKAN FILLER ABU BATU ZEOLIT

Analisis Faktor Penyebab Kerusakan Jaringan Irigasi Pada Daerah Irigasi Lomaya Kabupaten Bone Bolango

ANALISIS DAN EVALUASI KINERJA BUNDARAN SARONDE KOTA GORONTALO

Sustainable Self-Compacting Concrete: The Role of Limestone Powder as A Cement Replacement

The excessive use of cement in concrete production contributes significantly to environmental impacts, particularly CO? emissions. One potential solution is the partial replacement of cement with limestone powder in self-compacting concrete (SCC). This study aimed to investigate the effect of limestone powder as a partial cement replacement on the fresh properties and compressive strength of SCC. Limestone powder was used at replacement levels of 0%, 6%, 9%, 12%, and 15% by weight of cement. The fresh properties of SCC were evaluated using slump flow, V-funnel, and L-box tests, while compressive strength tests were conducted to assess hardened performance. The results showed that SCC mixtures containing up to 9% limestone powder satisfied the SCC workability requirements. The optimum performance was achieved at 6% limestone powder replacement, which produced a slump flow diameter of 600 mm and compressive strength of 29.58 MPa, exceeding the design strength target of 25 MPa. Higher replacement levels reduced both workability and compressive strength, with the 15% mixture failing to meet acceptable performance criteria. These findings indicate that limestone powder can be effectively utilized as a sustainable partial cement replacement in SCC at moderate replacement levels while maintaining satisfactory fresh and hardened properties.

Analisis Faktor Koreksi Dimensi Paving Blok

Manajemen Resiko Proyek Untuk Mencegah Terjadinya Pemutusan Kontrak Kerja Pada Proyek Abrasi Pantai Desa Biluhu Tengah

INDENTIFIKASI FAKTOR-FAKTOR MEMPENGARUHI KINERJA BIAYA OPERASIONAL DAN PEMELIHARAAN JARINGAN IRIGASI DI PAGUYAMAN

This study aims to identify the factors that influence the performance of operational and maintenance costs in the DI irrigation network. Paguyaman. To achieve this goal, the researchers used a survey method by distributing questionnaires to a number of respondents who were involved in the implementation and monitoring of DI irrigation networks. Paguyaman. Data collection was carried out by way of a direct survey to the location and a list of questions in the questionnaire for primary data. As for the secondary data obtained from the literature and data from related agencies. Based on the results of the questionnaire from the respondents, a ranking was made of the causal factors that affect the performance of operational and maintenance costs in the DI irrigation network. Paguyaman. From the ranking results, there are 15 factors that are categorized as influential. The conclusions that can be drawn after statistical tests are that there are seven factors that influence the performance of operational costs and maintenance of irrigation networks in D.I Paguyaman. These factors are unexpected conditions and events (floods, earthquakes and others), general information and methods in carrying out operations and maintenance for field officers are inadequate, there is still a lack of responsibility for officers in carrying out irrigation operations and maintenance, changes in areas that encouraging the conversion of paddy fields to other users, the number of operational and maintenance officers is still lacking, the equipment is of poor quality and there is no training for P3A, and the most dominant factors affecting the performance of operational costs and maintenance of irrigation networks in D.I Paguyaman are conditions and events that unexpected events (floods, earthquakes, etc.).