Evaluation and Application of Recipe for Binding Materials in Self-Compacting Concrete

2014 ◽  
Vol 629-630 ◽  
pp. 405-416
Author(s):  
Wei Chung Yeih ◽  
Jiang Jhy Chang ◽  
Mao Chieh Chi ◽  
Cheng Chin Chang ◽  
Ran Huang
Keyword(s):  
Raw Materials ◽  
Setting Time ◽  
Cementitious Materials ◽  
Heat Of Hydration ◽  
Test Results ◽  
New Era ◽  
Materials Research ◽  
Hardened Properties ◽  
The Stability

Concrete consists of many kinds of raw materials, the safety and quality of construction are greatly influenced by the stability of concrete. Thus, how to improve the performance of concrete and construction method, i.e. avoid the bleeding, segregation and honeycomb, etc, becomes a very important issue and imminent mission. This study discusses the different mixing designs of SCC with the amounts of cementitious materials ( OPC, GGBFS, and FA) ranged from 400 - 500 kg/m3. Meanwhile, the fresh and hardened properties of SCC, such as the slump flow, setting time, heat of hydration, and compressive strength were also determined. Test results indicate SCC binding materials can be classified by its compacting ratio. For instance, to pass the boxing test of R1/R2 within and without hindrance, the minimum binding materials should be 500kg/m3, 450kg/m3 and 400kg/m3. The optimum binding materials research shows if use cement, GGBFS and FA at the same time , it can increase the initial and final setting time and decrease the heat of hydration. The SCC binding materials’ concept will meet the requirement of " Safety, Durability, Workability and Ecology " for the new era. Thus, the amount of cement was at least 250kg/m3 or more for SCC mix design and the adding of GGBFS and FA was recommended to maintain 20 - 40 % of all cementitious materials based on the test results.

The issue of "oil shrinkage" during the compounding of oils in the processes of production, collection, preparation and transportation of hydrocarbon raw materials

2021 ◽  
pp. 104-113
Author(s):  
O. P. Deryugina ◽  
E. A. Trapeznikov
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Colloidal System ◽  
Main Pipelines ◽  
Different Types ◽  
Preliminary Study ◽  
The Stability ◽  
Mixed Oil

The article discusses the issue of industrial compounding, which improves the quality of the raw materials supplied to the main pipelines. Compounding from "to compound" (English) - to mix. When mixing different types of oil obtained, "incompatibility" is possible, which is expressed in the precipitation of a solid sediment and violation of the stability of the colloidal system and due to the differing properties of oils. Attention to this problem is due to the tightening of requirements for the quality of raw materials that must comply with modern standards. The article discusses the causes of the problem of "incompatibility" of oil during compounding and effective ways of solving it, substantiates the need for a preliminary study of the properties of mixed oil in order to identify possible incompatibility of various types of oil. The standard tests for determination of incompatibility indices characterizing the ability of raw materials to mix are considered. The article substantiates the need to develop methods for diagnosing the incompatibility of oils as the most important task of modern chemical science, the solution of which will improve the quality of the raw material obtained and solve many technological problems in the compounding process.

Production Quality Control of Moderate Heat Portland Cement and Analysis of Application Effect in Roller Compacted Concrete

2013 ◽  
Vol 423-426 ◽  
pp. 1090-1095 ◽  
Author(s):  
Yong Min Yang ◽  
Jie Long Cai ◽  
Ze Peng Chen
Keyword(s):  
Quality Control ◽  
Portland Cement ◽  
Raw Materials ◽  
Cementitious Materials ◽  
Production Quality ◽  
Production Quality Control ◽  
Standard Requirement ◽  
Roller Compacted Concrete ◽  
Entrance Test

Moderate Heat Portland Cement is not only frequently-used cement for dam but also one of the largest amount of special cement as a main cementitious materials of concrete in hydraulic structure in China. Due to the high quality requirement and the complicated technology in the construction of dam, a series of measures are adopted to control the production quality of Moderate Heat Portland Cement used in the dam construction. In this paper, the measures of production quality control of the Moderate Heat Portland Cement are introduced, including controlling the raw materials such as the cement raw meal, fuel, clinker and gypsum, managing the discharge from the mill and the entrance test, which ensure that the various targets of physical and mechanical indexes are in accordance with the standard requirement. Moreover, the engineering quality of Roller Compacted Concrete (RCC) for the dam is effectively guaranteed through the lower pot temperature and the less hydration heat. The construction experience is available for the like-kind engineering interiorly.

scholarly journals PROSES PEMBUATAN DAN PENGUJIAN BENDA UJI KERAMIK UNTUK BAHAN BAKU ISOLATOR LISTRIK KERAMIK PORSELEN (MANUFACTURING AND TESTING PROCESS OF CERAMIC SPECIMENS FOR RAW MATERIALS OF ELECTRICAL ISOLATOR PORCELAIN CERAMIC)

2016 ◽  
Vol 10 (3) ◽  
pp. 173-180
Author(s):  
Wahyu wahyu Garinas
Keyword(s):  
Test Object ◽  
Test Specimen ◽  
Raw Materials ◽  
Separation Process ◽  
Raw Material ◽  
Materials Processing ◽  
Test Results ◽  
Composition Materials ◽  
Ball Clay

Penelitian ini merupakan bagian dari kegiatan mencari bahan baku untuk pembuatan isolator keramik porselen. Bahan baku untuk pembuatan benda uji keramik sebagian besar menggunakan bahan baku lokal.Proses pengolahan bahan baku pada penelitian ini  : pembuatan komposisi, pengolahan bahan dan pembuatan benda uji.Metode yang akan dilakukan dalam pengolahan ini  yaitu proses pemisahan dengan cara basah dan kering.Untuk mengetahui kualitas kelistrikan dari bahan baku keramik maka dibuat benda uji dan dilakukan uji tegangan tembus listrik.Hasil uji terhadap benda uji ternyata  semua benda uji masih belum memenuhi standar IEC maupun ASTM. Nilai hasil uji terhadap sampel  sekitar   (7,99 - 9,35) kV/mm dan semua sampel  belum memenuhi  standar yang direkomendasikan oleh PLN (9,85 kV/mm). Hasil uji tersebut menunjukkan bahwa sampel no. 5 dan 6 yang mendekati standar dari PLN. Perlu evaluasi terhadap  komposisi , bahan dan proses pembuatan dari benda uji keramik. Kata Kunci : Bahan mentah keramik (kaolin, felspar, ball clay,kuarsa), pengujian  benda uji, pengujian tegangan tembus, kualitas bahan keramik. Abstract This study is part of the looking for raw materials for the manufacture of ceramic porcelain insulators.The raw material for the manufacture of ceramic test specimens mostly using local raw materials.The processing of the raw material in this study: preparing a composition, materials processing and manufacturing of the test object. The method will be done in this processing is the separation process by means of wet and dry.To know the the quality of the electrical ceramic raw materials then created of the test specimen and test the electrical Puncture Voltage.The test results of the test specimen it turns out all specimens still does not meet PLN (IEC and ASTM) standards.Value test results on samples approximately (7.99 to 9.35) kV / mm and all samples do not meet the standards recommended by PLN.The test results showed that the samples no. 5 and 6 are closer to a standard of PLN.Needs to be evaluation of the composition, materials and manufacturing process of ceramic test specimen. Keywords :  raw material ceramic, specimens test, puncture voltage test, ceramic material quality.

scholarly journals KARAKTERISTIK MARSHALL QUOTIENT PADA HOT MIX ASPHALT MENGGUNAKAN AGREGAT ALAM SUNGAI OPAK

2019 ◽  
Vol 15 (2) ◽  
pp. 84-91
Author(s):  
Maris Setyo Nugroho
Keyword(s):  
Hot Mix Asphalt ◽  
Road Construction ◽  
National Standard ◽  
Test Results ◽  
Quality Testing ◽  
Asphalt Content ◽  
Natural Aggregates ◽  
The Stability ◽  
Asphalt Quality

 ABSTRACTThe purpose of this study is to determine the Marshall Quotient (MQ) value of hot mix asphalt (HMA), which uses natural aggregates from the Opak river. In addition to the MQ value in this study also examines the value of stability and flow in concrete asphalt mixtures with asphalt content of 6.5%. The research method used was an experimental method in the JPTSP FT UNY road construction laboratory. The testing standard used refers to the Indonesian National Standard (SNI). In addition to testing Marshall values, preliminary testing is also carried out to determine the quality of the material used. Material testing includes aggregate quality testing and asphalt quality testing. Based on the test results, the stability, flow and MQ values were 1177.01 kg, 3.20 mm and 384.05 kg/mm respectively. When compared with the requirements in the RSNI 03-1737-1989, only the flow values do not meet the requirements.Keywords: hot mix asphalt (HMA), stability, flow, marshall quotient ABSTRAK Penelitian ini bertujuan untuk mengetahui nilai Marshall/Marshall Quotient (MQ)dari campuran aspal panas/hot mix asphalt (HMA), yang menggunakan agregat alami dari kali Opak. Selain nilai MQ pada penelitian ini juga mengkaji nilai stabilitas dan kelelehan (flow) pada campuran aspal beton dengan kadar aspal 6,5%. Metode penelitian yang digunakan yaitu metode eksperimental di laboratorium konstruksi jalan JPTSP FT UNY. Standar pengujian yang digunakan mengacu Standar Nasional Indonesia (SNI). Selain pengujian nilai Marshall juga dilakukan pengujian pendahuluan untuk mengetahui mutu material yang digunakan. Pengujian material yang dilakukan meliputi pengujian mutu agregat dan pengujian mutu aspal yang digunakan untuk campuran aspal beton. Bersarkan hasil pengujian diperoleh nilai stabilitas, kelelehan, dan nilai Marshall berturut-turut sebesar 1171,01 kg, 3,20 mm, dan 384,05 kg/mm. Jika dibandingkan dengan persyaratan nilai stabilitas, kelelehan, dan nilai marshal yang tercantum pada RSNI 03-1737-1989, hanya nilai kelehan saja yang tidak memenuhi persyaratan. Kata kunci: hot mix asphalt (HMA), stabilitas, kelelehan, nilai marshall

Exploring Possibilities of Implementation of Special Rutile Electrodes for Welding Microalloyed Steels

2016 ◽  
Vol 1138 ◽  
pp. 19-24
Author(s):  
Mihailo Mrdak ◽  
Nikola Bajić ◽  
Marko Rakin ◽  
Darko Veljić ◽  
Zoran Karastojković ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Weld Metal ◽  
Microalloyed Steel ◽  
Raw Materials ◽  
Microalloyed Steels ◽  
Test Results ◽  
Medium Thickness ◽  
Cored Wire ◽  
Ni Content

The paper presents test results of a new quality of a special rutile electrode, with a core of flux-cored wire made from local raw materials, based on analyzing mechanical properties and microstructure of the weld metal in MMA welding. The base metal for experimental welding was microalloyed steel marked J55 (thickness 7.0 mm) according to API Spec 5L standards (EN 10113-3. and JUS C.B0 502) which was produced in Smederevo steelworks. For experimental welding a special electrode IHIS E 35 R-2 was used, with a medium thickness rutile coating, a core of flux-cored wire and Ni content of 2.5%. The results of the analyzes indicate that the new quality special rutile electrode with the flux-cored wire core provides good structural and mechanical properties of weld metal in microalloyed steel welded joints.

scholarly journals SYNTHESIS AND INVESTIGATION OF PROPERTIES OF NANODISPERSED SYSTEMS BASED ON VINYL ACETATE

2020 ◽  
Vol 63 (9) ◽  
pp. 56-62
Author(s):  
Raisa V. Rodionova
Keyword(s):  
Emulsion Polymerization ◽  
Vinyl Acetate ◽  
Raw Materials ◽  
State Standards ◽  
Spectrophotometric Analysis ◽  
Main Role ◽  
Surface Active ◽  
The Stability ◽  
Technology Of Production

A method of producing nanodispersed systems, stabilized by the solvation mechanism, which consists of carrying out the emulsion polymerization with surface-active monomers – alkyletoksimaleinata, is developed. The influence of temperature, the ratio of monomers, the hydrocarbon radical length and number of ethoxy functional groups on the rate of the process of obtaining nanodispersions is analyzed. The study of the properties of synthesized nanodispersed systems and aggregate storage stability showed that all indicators are within certain State Standards. The spectrophotometric analysis of nanodispersions showed that emulsion polymerization occurred in all cases. Kinetics of decomposition of the initiator in aqueous solutions in the presence of surface-active monomer showed that alkyletoksimaleinata activates the stage of initiation of obtaining nanodispersed systems. Alkyletoksimaleinata proved to be more effective than widely used in emulsion polymerization the emulsifier OP-10. It is established that nanodispersed systems are stable during storage. The use of nanodispersed systems, modified by surface-active monomers, makes it possible to exclude the stage of plasticization by low-molecular compounds that degrade the electrical properties of the product. This leads to a reduction in the material and energy costs, to an increase in the life of the product, since in this case there is no exudation of the plasticizer, which worsens the quality of the product and causes environmental pollution. It is established that the main role in the stability of nanodispersed systems, modified by surface-active monomers, plays the hydration of particles. The technology of production of modified nanodispersed systems based on vinyl acetate and surface-active monomer is developed. The technological scheme of production of modified nanodispersed systems is arranged, the binding of the main apparatus is made. Rational use of raw materials will allow to obtain a higher yield of the product. The nanodispersed systems, modified by surface-active monomers, can be used in all areas where systems with conventional emulsifiers are used.

scholarly journals Analisis Pengendalian Kualitas Bahan Baku Acrylic Resin Pada Produk Spray Paint di PT X

2021 ◽  
Vol 1 (1) ◽  
pp. 31-41
Author(s):  
Nurlita Utami ◽  
Sena Atmaja ◽  
Yogi Priyo Istiyono
Keyword(s):  
Raw Materials ◽  
Film Formation ◽  
Acrylic Resin ◽  
Raw Material ◽  
Test Results ◽  
Literature Study ◽  
Factors Affecting ◽  
Analysis Process ◽  
Poor Adhesion

Thermo Plastic Acrylic resin has an important role in the manufacture of spray paint, namely as a binder or binder. The resin in paint has a function as a film formation, has adhesion to the substrate as well as pigment binders and additives, so that to produce a spray paint with good quality mechanical properties, PT X must be selective in controlling the quality of the raw material for Thermo Plasic Acrylic Resin. The purpose of this study was to determine the problems faced by PT X related to the quality of Thermo Plastic Acrylic Resin raw materials, to identify the most dominant factors affecting the quality of these raw materials and to formulate the most appropriate solutions to be applied in improving the quality of these raw materials. This research uses observation, interview, and literature study methods. Sources of data came from stakeholders and quality control staff of PT X. This study used check sheets, histogram diagrams, u-control maps, and fishbone diagrams to complete the analysis process. From the test results of the Thermoplastic Acrylic Resin raw material, it is known that the factor that causes rejection is due to adhesion, namely 53.57%, gloss 33.33%, and dry touch 13.10%, all three of the total raw materials that are rejected when the raw material is applied in form paint and spray on the film plate. The most dominant cause of reject was poor adhesion, namely 53.57% of the total reject raw materials.

scholarly journals RANCANG BANGUN MESIN PENGOLAH GANYONG MULTI FINGSI [Design of Multifunctional Canna Machine]

2017 ◽  
Vol 5 (2) ◽  
pp. 462-471
Author(s):  
Asep Yusuf ◽  
Wahyu Kristian Sugandi ◽  
Zaida ◽  
Ch.F. Godang Tua
Keyword(s):  
Agricultural Land ◽  
Raw Materials ◽  
Test Results ◽  
Human Beings ◽  
Processing Machine ◽  
Engine Design ◽  
Drive Motor ◽  
System Output ◽  
Main Components

Food is a basic requirement for human beings. As the population increases, food demand will continue to increase. Food problems in Indonesia are inseparable from rice and flour, in addition to other foodstuffs such as cassava, corn, and sago (Colas, 1994). Efforts to increase rice production are not easy, since there is a massive diversion of agricultural land functions into residential and industrial areas. Indonesia has the potential of tubers as a source of carbohydrates as well as raw materials of local flour. One of the sources of local starch that can be used as flour is canna (Canna edulis Ker). The obstacles faced by smallholders/ small and medium industries (SMEs) who use canna flour that is in the post-harvest process to produce canna flour. Making starch/ canna flour generally still done traditionally, thus affecting the productivity and quality of flour produced. This study aims to design a multi-function canna processing machine to produce canna flour as food. The research method used is the engineering method, which is the activity of designing the build canna processing machine. Canna machine has been successfully made with two main functions namely: the solvent and slicer. The main components of the machine consist of: frame, solvent unit, slicer unit, transmission system, output outlet, wheel, and drive motor. Dimensions of the machine that is 90 cm long, 85 cm wide and 100 cm high. While the frame dimension is 80 cm long, 70 cm wide and 65 cm high. Functional test results show that all components work properly.   Keywords: canna, canna machine, multifunctional, engine design   ABSTRAK   Pangan merupakan kebutuhan pokok bagi manusia. Seiring dengan meningkatnya jumlah penduduk, maka kebutuhan pangan akan terus meningkat. Masalah pangan di Indonesia tidak terlepas dari beras dan terigu, disamping bahan pangan lainnya seperti ubi kayu, jagung, dan sagu (Colas, 1994). Upaya untuk meningkatkan produksi beras bukan hal mudah, karena banyak terjadi pengalihan fungsi lahan pertanian secara massal menjadi area pemukiman dan industri. Indonesia  memiliki  potensi  umbi-umbian sebagai sumber karbohidrat sekaligus bahan baku tepung lokal. Salah satu tanaman sumber pati lokal yang dapat dijadikan tepung adalah ganyong (Canna edulis Ker). Kendala yang dihadapi oleh petani atau Industri Kecil Menengah (IKM) yang memanfaatkan tepung ganyong adalah pada proses pasca panen untuk menghasilkan tepung ganyong. Pembuatan pati atau tepung ganyong umumnya masih dikerjakan secara tradisional, sehingga mempengaruhi produktivitas serta kualitas tepung yang dihasilkan. Penelitian ini bertujuan untuk merancang bangun mesin pengolah ganyong multi fungsi sehingga dihasilkan tepung ganyong sebagai bahan pangan. Metode penelitian yang digunakan adalah metode rekayasa, yaitu kegiatan merancang bangun mesin pengolah ganyong. Mesin ganyong telah berhasil dibuat dengan dua fungsi utama, yaitu: pemarut dan pengiris. Komponen utama mesin terdiri dari: rangka, unit pemarut, unit pengiris, sistem transmisi, saluran pengeluaran hasil, roda, dan motor penggerak. Dimensi mesin yaitu panjang 90 cm, lebar 85 cm dan tinggi 100 cm. Sedangkan dimensi rangka, yaitu panjang 80 cm, lebar 70 cm dan tinggi 65 cm. Hasil uji fungsional menunjukkan bahwa semua komponen berfungsi dengan baik.   Kata kunci: ganyong, mesin ganyong, multi fungsi, rancang bangun mesin

scholarly journals OPTIMASI PARAMETER PROSES PEMBUATAN BIOETANOL SORGUM DAN PENGARUH TERHADAP UNJUK KERJA MOTOR BENSIN

Otopro ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 39
Author(s):  
Teng Sutrisno ◽  
Willyanto Anggono ◽  
Kurniawaan Lay ◽  
Melvin Emil Simanjuntak
Keyword(s):  
Laboratory Test ◽  
Raw Materials ◽  
Test Results ◽  
Alcohol Content ◽  
Fermentation Time ◽  
Renewable Fuel ◽  
Gasoline Engines ◽  
Laboratory Test Results

Bioethanol is a renewable fuel that resembles gasoline, bioethanol is produced from fermentation and distillation processes. One of the raw materials that produce bioethanol is Sorghum. Sorghum was chosen because it is superior to other plants. This study aims to analyze fermentation longtime and enzyme composition for the best composition to produce bioethanol from sorghum, and determine the quality of sorghum bioethanol. This research Sorghum  bioethanol produced with an alcohol content of 94%. The test and analysis variables used were 31 samples. The results of this study are as follows : The best fermentation time is 4 days, the enzyme and yeast variable for the most volume of alcohol is 7% yeast 5% enzyme, the enzyme and yeast variable for the highest alcohol content is 7% yeast 7% enzyme. Laboratory test results when compared with PERTAMINA's standard regulations, especially Pertalite RON 90, Several parameters have rejected the regulations. Therefore sorghum bioethanol is used as an additive for Gasoline. Sorghum bioethanol is made addictive to gasoline RON 90, namely B10 (bioethanol sorghum 10%) and B20 (bioethanol sorghum 20%). It would cause an increase in the performance of gasoline engines.

scholarly journals Interlaboratory comparisons of the results of the work of the chemical­analytical unit of JSC “The URIR named after A. S. Berezhnoy” in 2018

2019 ◽  
Vol 119 ◽  
pp. 127-133
Author(s):  
E. A. Bondarenko ◽  
V. V. Varganov ◽  
N. N. Konchinko
Keyword(s):  
Refractory Plant ◽  
Interlaboratory Comparison ◽  
Refractory Industry ◽  
Raw Materials ◽  
Quality Monitoring ◽  
Interlaboratory Comparisons ◽  
Test Results ◽  
Work Quality ◽  
Activity Areas

One of the activity areas of JSC “The URIR named after A. S. Berezhnoy” is assistance to refractory industry enterprises of Ukraine in ensuring their work in the quality monitoring of products and raw materials. The comparison of work quality of chemical­analytical units of following enterprises: JSC “KDZ”, PJSC “Chasovoyarsk Refractory Plant”, JSC “Velikoanadol Refractory Plant” and JSC “The URIR named after A. S. Berezhnoy” was carried out. The discrepancy between the average results of components determination in the chemical­analytical units of refractory enterprises and in the chemical­analytical laboratory of JSC “The URIR named after A. S. Berezhnoy” does not exceed the value of  in terms of ND. The work quality of chemical­analytical units of central refractory laboratories of all the above mentioned enterprises is satisfactory. Recommendations to improve the accuracy of analysis results are not required. The work on interlaboratory comparison of work results of the chemical­analytical unit of JSC “The URIR named after A. S. Berezhnoy” and IP “SGS Ukraine” was completed. The quality of interlaboratory comparisons carried out between the Testing Centre of IP “SGS Ukraine” and JSC “The URIR named after A. S. Berezhnoy” was found to be satisfactory. The test results were accepted by the NAAU during the next inspection as corresponding to DSTU ISO / IEC 17025:2006.

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