Logam berat adalah zat polutan utama di lingkungan. Logam berat adalah jenis logam dengan densitas yang tinggi dan sangat berbahaya bagi mahluk hidup, terutama manusia. Organisme hidup dapat mengabsorpsi bioakumulasi dan sedimentasi dari logam berat yang mengendap di dalam air. Beberapa senyawa yang terdapat dalam air limbah antara lain Kadmium (Cd), Tembaga (Cu), Besi (Fe), dan Timbal (Pb). Lo…
Lightweight concrete is a type of concrete that has a lower density than conventional concrete. LWC has density between 1140 kg/m3 to 1840 kg/m3, which is much lower than the density of conventional concrete. The manufacture of LWC can be done by adding fo am agent that will produce air bubbles or known as foamed concrete method. Cement if used in large quantities in concrete mixtures can incre…
In the mining business sector, the main thing in the mining stage is production. However, besides that there is one stage in the coal mining process that plays an important role in determining the continuity of the mining business, namely coal processing. The coal processing carried out is the process of reducing the material by crushing according to the coal desired by consumers or the market.…
This book uses theories, hypotheses, policies, practical insights and case studies to introduce and elucidate green building materials for sustainable construction. Cement is the most widely used building material in construction; however, it is not sustainable, being responsible for 7% of global carbon dioxide emissions and consuming huge quantities of energy. In order to limit the ecological …
Penelitian ini bertujuan untuk mengetahui perbandingan kekuatan tarik, dan struktur mikro pada material baja karbon sedang AISI 1050 setelah dilakukan pengelasan GMAW dengan kampuh X dan arus listrik yang digunakan 95 A dan 105 A. Metode penelitian yang digunakan adalah penelitian eksperimen, berdasarkan perlakuan yang diberikan oleh peneliti yaitu berupa pengelasan dengan menggunakan las GMAW …
The development of the industrial world, especially in the material sector, has its own problems, especially the hardness of brass material. The hardness of the brass material needs to be increased which when used continuously will experience friction which results in wear and tear. One of the ways to increase hardness is by means of heat treatment by adding holding time and cooling media. This…
A composite material is a material consisting of two or more material components, to produce new properties that are better than the previous material. The composite materials used in this study are WR200 Fiberglass, and Resin Matrix Alloy with Carbon. The composite material that will be used in this study is oriented towards a mixture of resin matrix, namely a mixture of resin with coconut cha…
PT XYZ is one of the companies engaged in the mining of non-metallic minerals such as kaolin. The company plans to produce kaolin by implementing an open pit mining system and using the backfilling mining method with technical plans for land use reclamation, revegetation and final settlement. The costs required for the reclamation activities of the production operation stage with a total area o…
PT. Berau Coal is one of the mining companies in Indonesia, which is engaged in coal mining. This research was conducted in pit q. block prapatan at the site of binungan mine operation 1. The condition of the bulldozer ripper tool has experienced many breakdowns so the PA plan of the D10T-2 bulldozer is not on target which makes the production of overburden material ripping not achieved. As in …
Pipa sering digunakan dalam berbagai industri, komersial, dan rumah tangga untuk mengalirkan cairan. Untuk mencapai tingkat produksi yang efisien dan biaya produksi yang rendah, penting untuk mengoptimalkan penggunaan energi. Saat cairan mengalir melalui pipa, gesekan antara cairan dan pipa dapat menyebabkan kerugian tekanan..Penelitian ini bertujuan untuk menganalisis pengaruh material dan dia…
PT Bukit Asam, Tbk has various types of coal with different qualities. As a result of this, the company has made coal blending effort so that the coal sold is in accordance with the specifications or contracts that have been approved. PT Bukit Asam Tbk. The Tarahan Port Unit has received a coal export request for MV. Xie Hai Yong Xin from China with the market brand type BA50 and a total tonnag…
The research was conducted at PIT BME in the work area of PT. Ansaf Inti Resources with scope limited to seam c and seam d. The purpose of this research is to find out how the influence of the cleat attribute and its relation to coal permeability. The research method used includes literature study, field observations in the form of measuring cleat attributes (orientation, spacing, aperture, den…
PT Bima Shabartum Wijaya is a company that will invest in andesite mining project in Damarpura Village, South Ogan Komering Ulu Regency, South Sumatra, which is targeted in 2023. In making an investment, it is necessary to analyze the investment and economic feasibility of mining. This economic analysis aims to assess whether this investment is feasible or not based on its economic level. The r…
Construction Materials is a comprehensive textbook covering all raw materials and products related to the construction processes, and not only those applied to building structures. The book is organized to help readers achieve competent knowledge about construction materials. At the beginning of the book the author offers the general concepts, definitions, and standards adopted worldwide…
Bauksit merupakan hasil proses pelapukan dari batuan granit yang di dalamnya terkandung bebagai mineral, salah satunya mineral boehmit (Al2O3) yang merupakan salah satu bahan yang digunakan dalam bahan baku pembuatan semen geopolimer. Untuk kadar Al2O3 dalam pembuatan semen geopolimer menurut Muchtar Aziz, Azahri (2014) yaitu 65,23%. Umumnya kadar Al2O3 hasil tambang tidak sesuai atau tidak men…
The study was located in Gumay Talang District, Lahat Regency, South Sumatra. The research location is located in the South Sumatra Basin and is included in the Muaraenim Formation (Tmpm). The study was conducted to determine the characteristics and distribution patterns of coal seams at the location. The methods used in this study are well logging and startmodel methods. Lithology found at the…
PT. Ulima Nitra, Tbk is a coal mining company located in Muara Enim, South Sumatra. Coal mining activities are carried out using digging and loading equipment in the form of 1 unit of Volvo EC480DL excavator and 1 unit of Komatsu PC850 excavator. And hauling equipment in the form of UD Quester CWE280 dump trucks as many as 13 units. The coal production target in 2021 is 1.553.000 tons/year, but…
Global warming and its effects are felt and understood by almost every one across the globe now. Carbon footprint calculation and mitigation in different industrial sectors is the need of the hour. There are numerous industrial sectors, whose carbon footprints need to be calculated and the ways to mitigate the greenhouse gas emissions from those sectors need to be started with immediate effect.…
In the concrete’s buildings with large spons , the using of the ordinary structure system will create the dimensions of the beam , column , and plate are large so that the building be disproporlionale . Therefore, the waffle slab structure system w as developed. Waffle slab is crossed beam system that is used to increase the stiffness of the plate , so that the smaller the deflection occurs ,…
Initially considered as a sub-class of ionic liquids, eutectic mixtures are formed by mixtures of low cost, often biodegradable Lewis or Bronsted acids and bases. Eutectic mixtures have gathered a growing scientific interest by the academic and industrial communities as they are interesting for many applications ranging from metal processing to biomass treatment or pharmaceuticals. This volu…
Berdasarkan penelitian para ahli lingkungan perkembangan jumlah limbah yang sangat pesat saat ini mempunyai dampak negative yang sangat besar terhadap rusaknya ekosistem kita saat ini.Limbah ban luar bekas kendaraan merupakan limbah yang dapat merusak lingkungan dan harus ditanggapi dengan serius karena jumlahnya terus bertambah seiring dengan bertambahnya jumlah kendaraan. Begitu juga dengan f…
Energy is a key world issue in the context of climate change and increasing population, 'calling for alternative fuels, better energy storage, and energy-saving devices. This books reviews the principles and applications of metals and metal oxides for energy, with focus on batteries, electrodes, nanomaterials, electronics, supercapacitors, biofuels and sensors.
Proyek pembangunan SMA Negeri 2 Palembang bahan/material yang sangat banyak. Untuk menjamin ketersediaan bahan/material tersebut perlu dilakukan pengendalian atas tiap-tiap bahan/material yang dibutuhkan. Terkadang terdapat kendala-kendala baik dalam penyediaan material maupun penyimpanan material. Melalui manajemen pengendalian material yang baik dan efisien diharapkan dapat mengatur dan mengo…
PENGGUNAAN ARUS PENGELASAN DAN POLA PENGELASAN DAPAT MEMPENGARUHI KEKUATAN TARIK HASIL PENGELASAN. PENGGUNAAN ARUS LAS DALAM PROSES PENGELASAN SEMAKIN BESAR DAERAH LELEH DAN ARUS PENGELASAN MAKA SEMAKIN BESAR KEKUATAN TARIK DAN REGANGAN TARIK. PADA PROSES PENGELASAN ADA GERAKAN YANG DIGUNAKAN DALAM MENGAYUNKAN ELEKTRODA. PENELITIAN INI MENGGUNAKAN METODE EKSPERIMEN YANG MENCAKUP PROSES PENGELAS…
Reservoir is a vessel or storage container that is used as a storage pressure resulting from the evaporation of a liquid. In its use the reservoir building material must be a good material in order to produce maximum results. This research is an experimental research which aims to determine the effect of the type of reservoir material, namely aluminum material, steel material and stainless stee…
The idea of this monograph is to present the latest results related to design and computation of engineering materials and structures. The contributions cover the classical fields of mechanical, civil and materials engineering up to biomechanics and advanced materials processing and optimization. The materials and structures covered can be categorized into modern steels and titanium alloys, com…
Perkerasan kaku (rigid pavement) yang menggunakan material beton dirancang untuk memikul beban kendaraan pada jalan itu sendiri. Dalam penelitian ini digunakan serbuk kulit kerang, sebagai bahan baku campuran dalam pembuatan beton untul lapisan perkerasan kaku, sehingga bermanfaat dan dapat menurunkan biaya operasional pembuatanya. Serbuk kulit kerang digunakan sebagai bahan pencampur dengan ko…
The papers in this volume deal with materials science, theoretical mechanics and experimental and computational techniques at multiple scales, providing a sound base and a framework for many applications which are hitherto treated in a phenomenological sense. The basic principles are formulated of multiscale modeling strategies towards modern complex multiphase materials subjected to various ty…