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KRISNA ACHMAD SUHUDI
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Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Transportation

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PENGARUH PEMAKAIAN SEMEN MERAH PUTIH, PASIR DARI GUNUNG GEDHANG, SERTA KORAL DARI BLITAR TERHADAP KUAT TEKAN BETON ADITYA PURNAMA; KRISNA ACHMAD SUHUDI; DEWI RAHMAWATI
JURNAL DAKTILITAS Vol. 3 No. 1 (2023): JUNI 2023
Publisher : PROGRAM STUDI TEKNIK SIPIL FAKULTAS TEKNIK UNIVERSITAS TULUNGAGUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36563/daktilitas.v3i1.813

Abstract

ABSTRACT The aim of the study was to determine the compressive strength of concrete by using red and white cement and using sand and coral from Gedhang Mountain as ingredients in the concrete mix. The materials used in this study were coarse aggregate and fine aggregate from the Gedhang Mountain, as well as Merah Putih cement with a mixture of 2.38 kg of cement, 1.14 kg of water, 3.54 kg of fine aggregate and 5.30 kg of coarse aggregate. The compressive strength test of concrete was carried out when the concrete was aged 7 days, 14 days and 28 days Based on the results of the study it can be concluded that concrete with a mixture of 2.38 kg of cement, 1.14 kg of water, 3.54 kg of fine aggregate and 5.30 kg of coarse aggregate produces a slump value of 10 cm. The highest concrete compressive strength value was found in specimen I aged 28 days with a quality of 29.33MPa. The lowest concrete compressive strength value was on specimen II aged 28 days with a quality of 17.58MPa. The process of mixing the mixture unevenly results in a decrease in the quality of the concrete. The longer the age of a concrete the greater the resulting compressive strength value. Keywords: cement, coral, compressive strength ABSTRAK Tujuan penelitian adalah mengetahui nilai kuat tekan beton dengan pemakaian semen merah putih dan pemakaian pasir serta coral dari Gunung Gedhang sebagai bahan pada campuran beton. Bahan yang digunakan dalam penelitian ini adalah, agregat kasar dan agregat halus berasal dari Gunung Gedhang, serta semen Merah Putih dengan campuran semen 2,38kg, air 1,14kg, agregat halus 3,54kg, dan agregat kasar 5,30kg. Pengujian kuat tekan beton dilakukan pada saat umur beton 7 hari, 14 hari, dan 28 hari Berdasarkan hasil penelitian dapat disimpulkan bahwa Beton dengan campuran semen 2,38kg, air 1,14kg, agregat halus 3,54kg, dan agregat kasar 5,30kg mengahasilkan nilai slump sebesar 10cm. Nilai rata-rata kuat tekan beton umur 7 hari 20,75MPa, umur 14 hari 21,9 MPa, dan umur 28 hari 23,6 MPa. Proses pengadukan campuran yang tidak merata mengakibatkan penurunan pada mutu beton. Semakin lama umur suatu beton semakin besar nilai kuat tekan yag dihasilkan. Kata kunci: semen,koral,kuat tekan
IMPLEMENTASI PEMODELAN MATEMATIKA MENGGUNAKAN ALGORITMA GENETIKA DALAM MENYELESAIKAN PERMASALAHAN PENJADWALAN PROYEK KONSTRUKSI BANGUNAN LUTFAN ANAS ZAHIR; KRISNA ACHMAD SUHUDI
JURNAL DAKTILITAS Vol. 3 No. 2 (2023): DESEMBER 2023
Publisher : PROGRAM STUDI TEKNIK SIPIL FAKULTAS TEKNIK UNIVERSITAS TULUNGAGUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36563/daktilitas.v3i2.962

Abstract

ABSTRACT The development of digitalization has accelerated since the covid-19 pandemic that hit the world in 2019.The role of digitalization in the economy is increasingly important, and is one of the enabling factors to increaseeconomic competitiveness in a country. Indonesia realizes the importance of digitalization for a country so that ithas initiated the mainstreaming of digital transformation and the implementation of the Strategic Priority Project(Major Project) "Information and Communication Technology Infrastructure to Drive Digital Transformation".The rapid development of technology provides many options for a construction service company to determine themethods and tools of Metaheruistic search algorithms that can be modeled or adapted to various problemsincluding scheduling. This scheduling system aims to minimize the average value of cost deviations. Critical pathmethod (CPM) is used to minimize cost deviation. Critical path analysis produces a length of time intended forcompletion of the project work duration. Determination of the critical path in this study using Genetic Algorithm.The results of the research on the data of 20 jobs with 3 constraint functions of duration, predecessor, and costobtained optimal critical path results with the critical path sequence ['D', 'A', 'B', 'G', 'C', 'E', 'H', 'F', 'K', 'I', 'L','J', 'M', 'N', 'O', 'P', 'Q', 'R', 'T', 'S']. Optimal Project Duration: 78 and Optimal Project Cost: 64000.Keywords: Critical Path Method (CPM), Genetic Algorithm, , Optimization, Scheduling,VScode. ABSTRAK Digitalisasi telah berkembang lebih cepat sejak pandemi COVID-19 melanda dunia pada 2019.Digitalisasi menjadi semakin penting dalam ekonomi dan merupakan salah satu komponen yang dapatmeningkatkan daya saing ekonomi suatu negara. Indonesia telah memulai pengarusutamaan transformasi digitaldan memulai Proyek Prioritas Strategis "Infrastruktur Teknologi Informasi dan Komunikasi untuk MendorongTransformasi Digital" sebagai bukti kesadaran negara akan pentingnya digitalisasi. Perkembangan teknologiyang semakin cepat memberikan banyak opsi bagi sebuah perusahaan jasa konstruksi untuk menentukan metodedan alat/ tools algoritma Metaheruistic pencarian yang dapat dimodelkan atau di adaptasikan pada berbagaipersamalahan termasuk pada penjadwalan. Sistem penjadawalan ini bertujuan untuk meminimalkan nilai rata –rata penyimpangan biaya. Metode jalur kritis atau Critical Path Method (CPM) digunakan untuk meminimalisirpenyimpangan biaya. Analisis lintasan kritis menentukan berapa lama waktu yang diperlukan untukmenyelesaikan proyek. Algoritma Genetika digunakan untuk menentukan garis besar penelitian ini. Hasilpenelitian pada data 20 pekerjaan dengan 3 fungsi kendala durasi, predesesor, dan cost memperoleh hasil criticalpath yang optimal dengan hasil urutan critical path ['D', 'A', 'B', 'G', 'C', 'E', 'H', 'F', 'K', 'I', 'L', 'J', 'M', 'N', 'O', 'P','Q', 'R', 'T', 'S']. Durasi optimal Project Duration: 78 dan Optimal Project Cost: 64000.Kata kunci: Algoritma Genetika, Critical Path Method (CPM), Optimasi, Penjadwalan, VScode.
Co-Authors Aditya Purnama DEWI RAHMAWATI Lutfan Anas Zahir