scholarly journals Systematic Study of Temperature and Different Types of Mixing in Paraffin Deposition Test Methods

ACS Omega ◽  
2020 ◽  
Vol 5 (21) ◽  
pp. 12320-12328
Author(s):  
Lilian Padula ◽  
Saugata Gon ◽  
Christopher Russell ◽  
Emily Pohl ◽  
Ian Littlehales ◽  
...  
Keyword(s):  
Systematic Study ◽  
Test Methods ◽  
Different Types ◽  
Deposition Test

Test Methods for Rheological Properties of Self-Compacting Concrete Pastes

2011 ◽  
Vol 338 ◽  
pp. 396-400
Author(s):  
Bao Guo Ma ◽  
Hui Xian Wang ◽  
Jian Huang ◽  
Liu Qing Song
Keyword(s):  
Rheological Properties ◽  
Cement Paste ◽  
Test Methods ◽  
General Study ◽  
Self Compacting Concrete ◽  
Cement Pastes ◽  
Different Types ◽  
Over Time

This paper provides a general study on cement paste flow which derived from self- compacting concretes. Rheometer, Marsh cone and mini-slump cone were used to evaluate fluidity of cement pastes containing superplasticizers of different types and dosages and loss of fluidity over time. There is a superplasticizer saturation dosage beyond which no significant fluidity increase can be found. This paper evaluated the effect of these three methods using rheometer as control and the optimum superplasticizer type for the preparation of self-compacting concrete was suggested.

Analysis of Keratin Fibre Damage under Various Surface Treatment Conditions

2008 ◽  
Vol 12 (1) ◽  
pp. 53-62 ◽  
Author(s):  
S.Y. Cheng ◽  
C.W.M. Yuen ◽  
C.W. Kan ◽  
K.K.L. Cheuk
Keyword(s):  
Diffuse Reflectance ◽  
Colour Change ◽  
Breaking Load ◽  
Test Methods ◽  
Test Results ◽  
Bleaching Process ◽  
Solubility Test ◽  
Treatment Conditions ◽  
Hair Samples ◽  
Different Types

This paper investigates the effect of three different treatments, namely (i) sunlight exposures, (ii) bleaching and (iii) perming on the damage of the keratin fibres (with the use of human hair). Scanning electron microscopy was applied to examine the surface morphology of the samples. Hair samples appeared to be rougher and their scales diminished after the treatments. The degree of colour change of samples was measured using a diffuse reflectance spectrophotometer. All three different treatments caused a certain degree of colour change on the samples. Urea bisulphite solubility test was also employed to investigate the alkaline damage of samples.The results illustrated that the urea bisulphite solubility of samples conformably decreased when they were subject to these three types of treatments. With respect to the tensile strength property, the results indicate that the breaking load of treated samples decreased dramatically after undergoing three different types of treatments. On evaluating the test results, it was concluded that the bleaching process imparted the most severe damages to hair. The results of the different test methods were evaluated and discussed.

Application and Patent of Static Mixer in Plastic Processing

2020 ◽  
Vol 13 ◽  
Author(s):  
Yihao Zhen ◽  
Jiankang Wang
Keyword(s):  
Development Trend ◽  
Polymer Processing ◽  
Test Methods ◽  
Research Progress ◽  
Static Mixer ◽  
Processing Methods ◽  
Static Mixers ◽  
Advantages And Disadvantages ◽  
Plastic Processing ◽  
Different Types

Background: With the improvement of the properties of plastic products, people gradually realize that the mixing capacity of extruders cannot meet the requirements of fully mixing materials, especially for nano-composites, colored products. In order to improve the mixing level of materials, static mixers are widely used. Researchers developed different types of static mixers to meet the purpose of homogenizing different materials. The mixed materials can achieve different level of mixing with different types of static mixers, which provided a favorable research condition to study the change of the properties of the mixed materials Objective: The structure, properties and the research progress of different static mixers in plastic processing were reviewed. Objective: This paper reviews the research progress of different types of static mixers in polymer processing, including the improvement of processing equipment, processing methods and static mixers, and expounds the influence of different types of static mixers and different processing methods on polymers Methods: The paper reviews various patents and research developments about the structure of different types of static mixers, and the application of static mixers in plastic processing. It also analyzes the advantages and disadvantages of a variety of patented technologies from the aspects of internal structure, micro-morphology, test methods, and equipment cost Results: Through the application of static mixer in plastic processing, the current and future development trend of static mixer in plastic processing is put forward to improve the quality and properties of composites Conclusion: Static mixers are widely used to improve the performance of mixtures. In recent years, there are many researches on the application of static mixer to improve the morphology, appearance and mechanical properties of polymer composites, blends as well as foams. The patents and technologies about static mixer provide some good references for improving the properties of multicomponent materials. It is still difficult to improve the properties of some mixtures. In order to further strengthen the properties of composite materials, better methods and equipment about static mixers are needed

Structure of a Control System in a Set of Devices for Document Durability Tests

2015 ◽  
Vol 220-221 ◽  
pp. 532-537 ◽  
Author(s):  
Andrzej Zbrowski ◽  
Andrzej Majcher ◽  
Mirosław Neska
Keyword(s):  
Control System ◽  
Technical Condition ◽  
Test Methods ◽  
Mechanical Loads ◽  
Different Types ◽  
Manual Handling

The article presents the structure of a control system installed in a series of test devices for durability tests intended for different types of documents, i.e. cards or book that are electronically secured with RFID labels. In the system in question, the test methods simulate typical document manual handling and therefore enable the determination of the influence of mechanical loads on the technical condition of the document, and the possibility to read the data stored in it. To make the execution of tests possible according to defined standards, a set of necessary components of the control system responsible for control, communication and actuator functions was developed. The objective of the tasks undertaken was to develop the structure of a control system, in which all designed test devices would be included, and to which additional apparatus could be added. The designed structure of the control system enables the application of numerous components of the same type in all test devices under one control. The developed control system is composed of basic modules included in every device and configurable modules selected individually for each type of tests.

Dispersants and Demulsifirs: Studies in the Laboratory, Harbor, and Polludrome

1999 ◽  
Vol 1999 (1) ◽  
pp. 195-202
Author(s):  
Julien Guyomarch ◽  
Olivier Kerfourn ◽  
François-X Merlin
Keyword(s):  
Water Content ◽  
Treatment Strategies ◽  
High Water ◽  
Test Methods ◽  
High Water Content ◽  
Persistent Pollutant ◽  
Different Types ◽  
Three Stages

ABSTRACT When spilled at sea, many oils are known to form emulsions. These emulsions are often of high-water content and viscosity, poorly dispersible, hard to recover and pump, and likely to remain as a persistent pollutant that may come ashore. To avoid these difficulties, demulsifiers have been used, either to inhibit emulsion formation or to break emulsions that have already been created. CEDRE (Centre de Documentation de Recherche et d'Experimentations sur les Pollutions Accidentelles des Eaux) has studied the efficiency of several demulsifiers on the rate of emulsion formation and on the dispersability of emulsified oils of different types. This study was conducted in three stages. First, a study of the rate and extent of emulsification was conducted in the laboratory. Second, the effect of demulsifiers was studied in floating mesocosms placed in a harbor. The demulsifiers did not succeed in totally preventing emulsion formation, but they inhibited the degree of emulsification of the oils for some time. Third, the dispersability of weathered oils was studied in laboratory using the IFP and WSL test methods and then in the Polludrome, where the effects of different treatment strategies combining demulsifiers and dispersants applications were assessed.

Method Design and Failure Analysis of the Penetration Test on Seamless Gas Cylinders

2014 ◽  
Vol 635-637 ◽  
pp. 682-686
Author(s):  
Yi Wen Yuan ◽  
Hao Hong Wu ◽  
Chong Wei Yang
Keyword(s):  
Working Conditions ◽  
Design Method ◽  
Test Methods ◽  
Safety Performance ◽  
Specific Method ◽  
Penetration Test ◽  
Gas Cylinder ◽  
Different Types ◽  
Gas Cylinders ◽  
Scanning Electron

Requirements of the penetration test on various seamless gas cylinders are analyzed to determine the specific method of the penetration test on different types of gas cylinders. The actual penetration test on the cylinder for on-board storage of fuel for automotive vehicle is taken for example to make a comparison with the design method and validate correctness and reliability of the designed test methods; corresponding failure fracture is analyzed through a scanning electron microscope to validate the affect of the penetration test on safety performance of the seamless gas cylinder and predict the possible results under actual working conditions.

scholarly journals Relationship between deformation moduli obtained using light falling weight deflectometer and static plate test on various types of soil

2014 ◽  
Vol 9 (4) ◽  
pp. 251-259 ◽  
Author(s):  
Karel Pospisil ◽  
Petr Zednik ◽  
Josef Stryk
Keyword(s):  
Test Methods ◽  
Falling Weight Deflectometer ◽  
Loading Test ◽  
Plate Test ◽  
Plate Loading Test ◽  
Static Modulus ◽  
Different Types ◽  
Falling Weight ◽  
The Relationship ◽  
Plate Loading

There is increasing effort to optimize test methods for evaluation of subgrade. It takes effect in aspiration in replacement of static plate loading test by other faster test methods. One of them is the use of Light Falling Weight Deflectometer. In many countries in Europe both static and dynamic plate tests are standardized. The presented paper introduces results of the research project dealing with the sensitivity of the relationship between static modulus and modulus obtained from the Light Falling Weight Deflectometer on specific types of soil. It is shown that there are significant differences in relationship between moduli values obtained using both methods on different types of soil.

Considerations for the Evaluation of Fouling Resistant Coatings for Centrifugal Compressors

2021 ◽  
Author(s):  
Scot Laney
Keyword(s):  
Corrosion Resistance ◽  
Centrifugal Compressor ◽  
Test Methods ◽  
Specific Aspect ◽  
Laboratory Setting ◽  
Centrifugal Compressors ◽  
Corrosion Tests ◽  
Resistant Coating ◽  
Different Types ◽  
Other Test Methods

Abstract For over forty years, coatings have been used as a means to prevent the build-up of foulants on the flow passages of centrifugal compressors. In general, this has been a “One Size Fits All” solution, with most OEMs and applicators offering nearly identical coating systems, despite the fact that there are distinct differences in the types of foulant that occurs in different services. To develop new coatings, there are two options, test “on the job” or test in a laboratory setting. This paper looks at various test methods to evaluate coatings by isolating the important aspects that a good fouling resistant coating should possess, namely fouling, erosion, and corrosion resistance. Each of these will be investigated separately in a battery of easy to perform tests. To the extent possible, the tests for each aspect attempt to replicate the complex conditions that occur in a centrifugal compressor that impact that specific aspect. The fouling and corrosion tests were performed with considerations for two different types of service. To illustrate the ability of the test to evaluate various coatings, the results from three different coatings will be discussed. These test methods will also be compared to other test methods used in literature.

Sign in / Sign up

Export Citation Format

Share Document