scholarly journals The Utilization Of Cocopeat As Environmentally Friendly Composite

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Soeparno Djiwo ◽  
E.Y. Setyawan ◽  
D.H Praswanto ◽  
T.N. Prihatmi ◽  
D. Hermawan
Keyword(s):  
Mechanical Strength ◽  
Mass Fraction ◽  
Environmentally Friendly ◽  
Strength Test ◽  
Test Results ◽  
Tensile Strength Test ◽  
Technical Requirements ◽  
Average Impact ◽  
Polyester Matrix ◽  
Shape And Size

The purpose of this study was to find environmentally friendly-based composite materials by utilizing natural materials that have been underutilized. The environmentally friendly composite is biodegradable which means that if it is not used it can decompose and will not affect or damage the environment. Not all natural ingredients are environmentally friendly; this depends on the application of the material. Composites made from cocopeat utilization can be applied to broad technical requirements. The maximum composite tensile strength test results were 13,473 MPa obtained in composites with 60% matrix with 40% coconut powder, shape and size using ASTM D638-3 and average impact strength 0,00994 J/mm2 obtained from composite 60% matrix with coconut powder 40 % the shape and size using ASTM D790-3, the process of using hand lay up. Adding a polyester matrix to the composite can increase the mechanical strength of the composite. On the other hand, excessive coconut powder in the mass fraction composite will reduce its mechanical strength. The observation of SEM photos in coconut powder shows the pores that can be used further to tie more matrices and able to increase the mechanical strength of the coconut powder composite.

scholarly journals Evaluating Marination Effect of Diluted Zycothermon Hot Mix Asphalt

2017 ◽  
Vol 3 (3) ◽  
pp. 18
Author(s):  
Ilham I. Mohammed
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Strength Test ◽  
Stability Test ◽  
Test Results ◽  
Great Range ◽  
Tensile Strength Test ◽  
Moisture Conditions

Sinceasphalt concrete undergo different failure problems at different temperature and moisture conditions and for years many scientists and researchers used different kinds of materials and variety of methods for improving the properties of asphalt concrete made with either basalt or limestone.So it became necessary to provide the best possible way to get rid of these failure problems.In this study diluted zycotherm nanomaterial at three different percentages by weight of aggregate used with two aggregate types, basalt and limestone, and asphalt concrete made with the marinated aggregate and later the properties of asphalt concrete were investigated after the marination.Indirect tensile strength test and retained stability test results were used to evaluate the marinating effect.As a result zycotherm dilution by weight of aggregate has changed the properties of asphalt mixture and improved to a great extent. From the results it can be concluded that rutting and fatigue problems decreased with a great range.

scholarly journals Designing and Testing Cold-Formed Rounded Connections Made on a Prototype Station

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1061 ◽  
Author(s):  
Michał Rejek ◽  
Nikodem Wróbel ◽  
Jolanta Królczyk ◽  
Grzegorz Królczyk
Keyword(s):  
Strength Test ◽  
Outer Diameter ◽  
Test Results ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Tensile Strength Test ◽  
Leakage Test ◽  
Fea Simulation ◽  
Forming Tools ◽  
Non Destructive

This paper presents the design of cold-formed rounded connections between a tube and a connecting block and the analysis of test results that were carried out with six fabricated samples. The joints manufactured on a specially designed prototype station were made by forming tools that were adjusted to connecting elements regarding the diameter and the shape. All of the samples prepared for this study were of the same diameters relating to the diameter of a hole in a connecting block and the outer diameter of a pipe flange. However, they were different concerning the height of the connecting block flange. The article presents features of joints that were manufactured with a designed forming tool on the prototype station. The achieved connections were examined in destructive testing (Micrography, Tensile Strength Test) and in non-destructive testing (Leakage Test). The research project aims were to state the differences in energy consumption of made connections and extend the concept of cold-formed rounded connections. Furthermore, this article presents the effects of FEA simulation of the cold-formed joint based on the results of destructive and non-destructive tests.

The Broken Analysis of 220kV Transmission Line Tension Crimp Barrel Steel Core

2014 ◽  
Vol 926-930 ◽  
pp. 950-953
Author(s):  
Guo Dong Han ◽  
Shu Ting Wan ◽  
Zhang Qin Wu ◽  
Zhan Jie Lv ◽  
Rong Hai Liu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Transmission Line ◽  
Visual Inspection ◽  
Line Tension ◽  
Strength Test ◽  
Accident Analysis ◽  
Test Results ◽  
Size Measurement ◽  
Tensile Strength Test ◽  
Steel Core

Through the visual inspection, the appearance of size measurement, crimping size measurement, the steel core crimping length measurement and steel core tensile strength test of tension crimp barrel on 220kV transmission line. Made a detail analysis on test results combined with wire crimping theory. Pointed out the wire crimping defects caused by crimping irregularities. Analyzed the main causes of rupture accident, and made recommendations for improvement. Provides a reference to wire crimp and wire accident analysis.

scholarly journals Tensile Strength of Bamboo After Preservation

2020 ◽  
Vol 3 ◽  
pp. 153-155
Author(s):  
Noverma ◽  
Oktavi Elok Hapsari ◽  
Yusrianti
Keyword(s):  
Tensile Strength ◽  
Research Method ◽  
Test Sample ◽  
Strength Test ◽  
Test Results ◽  
High Tensile Strength ◽  
Time Duration ◽  
Tensile Strength Test ◽  
Weather Changes ◽  
X 24

Bamboo has high tensile strength, so it can be an alternative to substitute wood or steel. Bamboo is a material that comes from nature, so it is vulnerable to degraded by weather changes and infected by termites and fungi. The effort to overcome this problem is by preserving before using it. This study aims to determine the tensile strength test results of bamboo after preserving and then compare with the tensile strength test results of bamboo without preserving. The research method was carried out by preserving bamboo by soaking the test sample in a container filled with water for a duration of time; 1 x 24 hours; 3 x 24 hours and 14 x 24 hours. The water used in freshwater with a salinity of 0 0/00 measured using a salinometer. The results showed that the tensile strength of bamboo increased compared without preserved with a percentage of 12.50%; 23.12% and 10.59% for the duration of time respectively 1x24 hours; 3x24 hours and 14x24 hours. Optimal tensile strength is obtained at a time duration of 3 x 24 hours and decreases at a longer time duration of 14x24 hours.

scholarly journals Superficial morphology and mechanical properties of in vivo aged orthodontic ligatures

2013 ◽  
Vol 18 (3) ◽  
pp. 107-112 ◽  
Author(s):  
Glaucio Serra Guimarães ◽  
Liliane Siqueira de Morais ◽  
Margareth Maria Gomes de Souza ◽  
Carlos Nelson Elias
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Strength Test ◽  
Test Method ◽  
Test Results ◽  
Tensile Strength Test ◽  
Oral Environment ◽  
Scanning Electron

INTRODUCTION: The degradation of elastic ligatures in the oral environment results in the need of periodic replacement to maintain the optimal force during the orthodontic treatment. The purpose of this study was to perform a clinical prospective randomized study of the degradation of orthodontic elastomeric ligatures in the oral environment by scanning electron microscopy (SEM) and tensile strength test. METHOD: Two hundred elastic ligatures were randomly selected and placed around the brackets of 5 volunteers and removed in groups of 10, at different times (1, 2, 3, and 4 weeks). The control group was performed by another fifty ligatures which were not submitted to the oral degradation. The analyses were done by scanning electron microscopy (SEM) and strength mechanical test. RESULTS: The tensile strength test results showed reduction in the ultimate strength values after four weeks ageing in the oral environment and no statistical difference in the yield strength values (p < 0.05). The orthodontic elastomeric ligatures surface was significantly degraded in the oral cavity after four weeks. The elastomeric degradation began in the first week when the increase in the roughness could be detected just in some areas. Afterwards, the surface became gradually rougher and, after 4 weeks, it was totally rough with some crack areas. CONCLUSIONS: The elastic ligatures aged in the oral environment showed higher superficial degradation and lower loss of mechanical properties after the maximum experimental period.

A Potential Application of the Mechanical Tensile Strength Test for Indicating Paper Biodegradation

2016 ◽  
Vol 723 ◽  
pp. 183-190 ◽  
Author(s):  
Duongruitai Nicomrat ◽  
Jirasak Tharajak
Keyword(s):  
Tensile Strength ◽  
Mechanical Strength ◽  
Filter Paper ◽  
Contact Time ◽  
Reducing Sugars ◽  
Fermentation Broth ◽  
Strength Test ◽  
Commercial Application ◽  
Tensile Strength Test ◽  
Mechanical Tensile

Tensile strength test for paper has been regularly used in measurement of paper quality in the industry. In this study, changes in properties of paper during biodegradation were compared by measurement of the tensile strength cellulose activity. Samples of filter paper and polyethylene coated paper were digested with cellulose degrading Bacillus isolates. Treatment with water was used as a negative control. The paper samples were cut into precise shape according to the standard protocol of mechanical tensile strength test to measure the maximum tensile force. After removing bacterial biomass, reducing sugars were measured as a surrogate for callulase activity in the spent fermentation broth and the paper samples were subjected to the mechanical strength, breaking load and stretch tests. The results showed the amount of stretch in paper was critically reduced over longer contact time in bacterial culture. Changes in the mechanical strength were apparent within 3-7 days of contact time, whereas changes in reducing sugars were observed only after 7-10 days of incubation depending on the paper type. In filter paper samples, more reducing sugars and less mechanical strength indicated increased biodegradation of the cellulose matrix. Overall, the mechanical tensile strength test was deemed an early indicator for paper biodegradation that may have commercial application.

Study on Crack Bridging Ability of Polymer-Modified Cement Based Compounds for Waterproofing Material

2015 ◽  
Vol 1129 ◽  
pp. 217-221 ◽  
Author(s):  
Hong Zhao ◽  
Wei Li ◽  
Yong Ming Zhang
Keyword(s):  
Tensile Strength ◽  
Strength Test ◽  
Test Method ◽  
Test Results ◽  
Engineering Applications ◽  
Crack Bridging ◽  
Ability Test ◽  
Elongation At Break ◽  
Tensile Strength Test ◽  
Good Ability

China's existing polymer-modified cement based compounds for waterproofing material standards are used for the tensile strength test and elongation at break test as the test method to evaluate the performance of the product extension. The elongation only reflects the extension ability of product, but cannot indicate the crack bridging ability of the product. In engineering applications, there is a requirement for higher bridging cracks ability of the products. In this paper, 9 samples of polymer-modified cement based compounds for waterproofing material were tested. Crack bridging ability was tested under the standards and methods in DIN EN 14891:2013-07. Tensile strength and elongation at break were tested according to the standards and methods in GB23445:2009. The crack bridging ability test results are between 0 to 2.08mm, in which 5 of them meet the requirements of greater than 0.75mm according to DIN EN14891:2013-07.The tensile strength test results are between 1.13MPa to 3.19MPa, the elongation at break test results are between 4% to 350%.The results show that higher tensile strength and higher elongation at break will have good ability of crack bridging. Samples with better crack bridging ability are close to type III product according to GB23445-2009 which requires tensile strength ≥ 1.8MPa and elongation at break ≥ 30%. Crack bridging ability directly reflects the product’s ability of crack bridging, and is more in line with the actual requirements in engineering applications. It is recommended that the crack bridging ability test method should be adopted in the formulation of China polymer-modified cement compounds for waterproofing material standards.

scholarly journals Simulation Analysis and Experimental Study on Strength Optimization of a Plug-In Oil Hose Joint

2018 ◽  
Vol 2018 ◽  
pp. 1-22
Author(s):  
Chang Chen ◽  
Jikun Guo ◽  
Shifu Zhang ◽  
Qixin Zhang ◽  
Dongmei Zhang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Field Experiments ◽  
Simulation Analysis ◽  
Structural Characteristics ◽  
Geometric Model ◽  
Three Dimensional ◽  
Strength Test ◽  
Test Results ◽  
Tensile Strength Test ◽  
Oil Transportation

A plug-in oil hose joint is used as the research object in this study. Aimed at the problem of pipeline breakage due to insufficient strength of the joint during the process of oil transportation on the sea, a three-dimensional geometric model of the joint is constructed according to the structural characteristics of the plug-in joint. The mechanical properties of the plug-in hose joint were studied by numerical simulations and field experiments. The strength of the joint was optimized by applying materials with different properties and adjusting the circular angle of the joint. The tensile strength test results of the plug-in oil hose joint are consistent with the theoretical analysis, which shows that the method proposed in this paper can effectively improve the tensile strength of the oil hose joint. It is of great significance to expand the scope of the plug-in connector and ensure the safe and stable use of the hose system.

Sign in / Sign up

Export Citation Format

Share Document