scholarly journals Wear Analysis of Materials Used for a Track Steering System in Abrasive Soil Mass

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6164
Author(s):  
Klaudia Olejniczak ◽  
Jerzy Napiórkowski
Keyword(s):  
High Density Polyethylene ◽  
Comparative Research ◽  
Resistance Index ◽  
Soil Mass ◽  
Steering System ◽  
Hadfield Steel ◽  
Natural Soil ◽  
Wear Analysis ◽  
Ethylene Content ◽  
Materials Used

This paper presents the results of comparative research on materials used for a track steering system in an abrasive soil mass. Two types of elastomer tracks were tested: a steel-rubber stave from an asphalt paver and a rubber overlay used in vehicles with a steel track chain. The results obtained were related to the wear of Hadfield steel. The tests were carried out on a “spinning bowl” stand in a natural soil mass, which consisted of two types of soil: light and heavy. It was shown that the resistance to abrasive wear depended on the grain size of the worked soil and the chemical composition of the materials. Rubber overlay was found to have the highest resistance index in all types of soils. It was made of high-density polyethylene, low-density polyethylene, ethylene acrylate/ethyl copolymer (ethylene acrylate 18%) and ethylene/propylene copolymer with an ethylene content of 60%. An analysis of the condition of the machined surfaces after friction tests complements the results presented.

scholarly journals Biofilm formation by Vibrio parahaemolyticus on different surfaces and its resistance to sodium hypochlorite

2018 ◽  
Vol 48 (12) ◽  
Author(s):  
Janaina Viana da Rosa ◽  
Natália Volpato da Conceição ◽  
Rita de Cássia dos Santos da Conceição ◽  
Cláudio Dias Timm
Keyword(s):  
Stainless Steel ◽  
Sodium Hypochlorite ◽  
Biofilm Formation ◽  
Vibrio Parahaemolyticus ◽  
High Density Polyethylene ◽  
High Density ◽  
Bacterial Populations ◽  
Farfantepenaeus Paulensis ◽  
Materials Used ◽  
Fish Industry

ABSTRACT: Vibrio parahaemolyticus is an important pathogen for both fish industry and consumers. It forms biofilm which makes it difficult to eliminate this microorganism using sanitizers. This study aimed to assess biofilm formation on different surfaces and effect of biofilm on resistance to sanitizers. Eight isolates of biofilm-forming V. parahaemolyticus were tested for the ability to form biofilms on a number of surfaces including high density polyethylene, stainless steel, glass, exoskeleton of Farfantepenaeus paulensis (Pink Shrimp), and operculum of Micropogonias furnieri (Whitemouth Croaker). Efficiency of sanitizer sodium hypochlorite against the bacteria was evaluated in the biofilms formed on the surface of the materials used; out the eight strains analyzed four formed biofilm on different surfaces. The present study shows that there are variations between surfaces in terms of biofilm formation, with more than one bacterial strain being able to form biofilm on the surface of the operculum of M. furnieri and on high density polyethylene as well. One isolate formed biofilm on glass, and one isolate formed biofilm on stainless steel. Sanitizers reduced biofilm formation on all surfaces. Based on our findings, we concluded that V. parahaemolyticus isolates have different ability to form biofilm on different surfaces. No isolates formed biofilm on shrimp shells. Results of this study also showed that sodium hypochlorite eat a concentration of 20 parts per million (20ppm) of Cl2, albeit not able to eliminate bacteria reported in biofilms, is still capable of reducing bacterial populations.

EFFECT OF LASER HARDENING OF STEEL ON THE WEAR PROCESS IN AN ABRASIVE SOIL MASS

Tribologia ◽  
2018 ◽  
Vol 280 (4) ◽  
pp. 63-69 ◽  
Author(s):  
Jerzy NAPIÓRKOWSKI ◽  
Łukasz KONAT ◽  
Marta PIETRUSZEWSKA
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Resistance Index ◽  
Soil Mass ◽  
Abrasive Wear Resistance ◽  
Laser Hardening ◽  
Test Results ◽  
Wear Process ◽  
Hardening Treatment ◽  
Type Machine

This paper presents the results of tests for the effects of laser hardening on the course and intensity of wear of 38GSA (38MnSi4) and Hardox 600 steels in an abrasive soil mass. The tests were carried out under laboratory conditions, using a “rotating bowl” type machine. Two types of soil, i.e. light and medium, were used as the abrasive mass. Based on the obtained test results, it was found that hardness decreased (in relation to asdelivered condition). The performed laser surface hardening process significantly increased the abrasive wear resistance only for 38GSA (38MnSi4) steel. As regards to Hardox steel, the hardening treatment reduced the abrasive wear resistance index compared to the as-delivered condition of the steel.

scholarly journals Differences of in children’s motivation to brush their teeth using toothpaste and without toothpaste

2013 ◽  
Vol 25 (2) ◽  
Author(s):  
Ade Sri Nengsih
Keyword(s):  
Statistical Analysis ◽  
Preschool Children ◽  
Informed Consent ◽  
Sample Size ◽  
Comparative Research ◽  
Sampling Technique ◽  
Extrinsic Factor ◽  
Motivation Scale ◽  
Materials Used ◽  
Single Blind

Introduction: Motivation to brushing teeth consists of intrinsic and extrinsic factor. Extrinsic factor is the most influence to chlid’s motivation. One of the extrinsic factor is toothpaste. The purpose of this study was to analyzed child’s motivation differences between using toothpaste and without toothpaste. Method: This applied descriptive comparative research was using single blind method, with a sample size of 62 preschool children at Sekeloa, ranged from 4 to 6 years old. sampling technique using total sampling. The variables in this study were child’s motivation and toothpaste. The tools and materials used in this study were motivation scale and tooth brushing activity sheets, informed consent, toothpaste, and toothbrushes.Result: The result shows that the highest motivational category on children who using toothpaste are 8 students (25,81%), while on children without toothpaste are 3 students (9,68%). Base on statistical analysis shows that a large motivational differences between children group using toothpaste and without toothpaste. Conclusion: There is a differences motivation between children that brush their teeth using toothpaste without toothpaste.

Wear analysis of materials used as orthopaedic implants

Wear ◽  
2006 ◽  
Vol 261 (9) ◽  
pp. 971-979 ◽  
Author(s):  
Jean Geringer ◽  
Bernard Forest ◽  
Pierre Combrade
Keyword(s):  
Orthopaedic Implants ◽  
Wear Analysis ◽  
Materials Used

scholarly journals Analisis Kinerja Campuran Aspal Beton (AC–BC) Menggunakan Liquid Asbuton Dengan Penambahan Serpih Sampah HDPE (High Density Polyethylene)

2020 ◽  
Vol 4 (1) ◽  
pp. 78-90
Author(s):  
Daud Nawir ◽  
Achmad Zultan M
Keyword(s):  
Financial Incentives ◽  
High Density Polyethylene ◽  
Road Construction ◽  
Plastic Waste ◽  
High Density ◽  
Road Pavement ◽  
Ideal Plastic ◽  
Materials Used ◽  
Marshall Stability ◽  
The Ideal

The use of asphalt (Liquid asbuton) as a road pavement material can be an economical and efficient choice for road construction and maintenance because, in addition to being cheaper and having better work abilities compared to other types of buton asphalt, a new step is carried out by using Asbuton liquid in a hot mix. One of the materials used is high-density polyethylene (HDPE) plastic waste. The ideal plastic prohibition needs to be balanced with waste management and financial incentives to change the habits of consumers and industry players. This research was conducted to determine the effect of using HDPE type plastic as an addition to the Asphalt Layer mixture Concrete (Laston) in terms of Marshall characteristics by using liquid asbuton and the level of plastic addition used was 2%, 4%, and 6% The results achieved were the addition of plastic waste flakes into the asphalt concrete mixture AC-BC can save asphalt 6% to the weight of asphalt The characteristics of the AC-BC mixture can be explained that with the addition of plastic waste flakes, stability will rise, flow decreases, Marshal Quotien (MQ) increases, VIM decreases, VMA decreases, VFB increases with increasing levels of effective asphalt, remaining marshall stability can be reached above 90%, and the cavity in the cam Puran at the refusal density can be achieved in the range greater than 2%.

A Study of the Nature of the Shear Strength of Soil-Waste Composites

2014 ◽  
Vol 634 ◽  
pp. 400-409
Author(s):  
Decio Lopes Cardoso ◽  
Talita Bassegio Kaminski ◽  
Francine Stelle Goldoni ◽  
Guilherme Irineu Venson ◽  
Camila Daiane Cancelier
Keyword(s):  
Pore Space ◽  
Triaxial Compression ◽  
Friction Angle ◽  
Soil Mass ◽  
Substantial Effect ◽  
Particulate Material ◽  
Soil Reinforcement ◽  
Engineering Properties ◽  
Natural Soil ◽  
Compression Tests

The soil is a brittle material compared to other engineering materials such as steel, concrete and wood. The clayey nature of the soils of western Paraná causes them to be chemically reactive towards certain compounds, thereby improving their engineering properties, especially its mechanical strength. The study involved treating the typical soil of the region with two residues from industrial and human activities: rice husk ash (RHA) at doses 0; 2.5; 5; 7.5 and 10%; and burned sewage sludge (BSS) at doses 0; 5; 10; 15 to 20%; in the dry soil mass. The test samples were compacted in Mini-MCV equipment and broken in triaxial compression tests of consolidated undrained type, with confining pressures of 25; 50 and 100 kPa. The results showed that both the RHA change dramatically as the BSS which passes viscoelastic plastic-linear mechanical behavior of the composites. There was a significant increase in deviator tension and elasticity modulus, implying a gain in strength and stiffness of the composite compared to the natural soil. The most striking effect was observed in the RHA cohesion parameter; while the substantial effect of BSS was observed in the interparticles friction angle. These results suggest that RHA promoted the formation of new products filling the pore space of the composite, changing the clayey material in a nature of a continuum, while the BSS promoted a substantial aggregation of the particles, wherein the soil reinforcement transformed clay in a particulate material coarser grain size.

Summary and Analysis of Transparent Soil Tests Technology

2014 ◽  
Vol 1073-1076 ◽  
pp. 1684-1688
Author(s):  
Xing Wang ◽  
Pei Sheng Xi
Keyword(s):  
Raw Materials ◽  
Natural Soil ◽  
Soil Tests ◽  
Transparent Soil ◽  
Internal Deformation ◽  
Materials Used

Transparent soil is a kind of material that can be used to observe the internal deformation under different conditions which has the similar characteristics with natural soil. This paper introduced the optical principles and the preparation of raw materials used to composite transparent soil. Stated the development of the transparent soil and summarized the main innovation achievements of the research trials around domestic and foreign. This paper also indicated that the existed tests mainly contrary to transparent sand while transparent clay is rarely involved and then proposed the study ideals and views about transparent clay.

scholarly journals Wear Properties of Nitride-Bonded Silicon Carbide under the Action of an Abrasive Soil Mass

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2043
Author(s):  
Jerzy Napiórkowski ◽  
Klaudia Olejniczak ◽  
Łukasz Konat
Keyword(s):  
Silicon Carbide ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Wear Test ◽  
Soil Mass ◽  
Boron Steel ◽  
Soil Conditions ◽  
Wear Properties ◽  
Light Soil ◽  
Materials Used

Nitride-bonded silicon carbide is an alternative to steels resistant to abrasive wear. This paper presents the results of a nitride-bonded silicon carbide (SiC) wear test in diverse soil conditions. The test was performed on a “spinning bowl” test stand on three soil types: loamy sand, light loam and ordinary loam. The results were referred to the wear test for materials used to make parts working soil mass, i.e., abrasive wear-resistant steel, boron steel and C + Cr + Nb padding weld. The abrasive wear resistance of silicon carbide was shown to depend on the grain size distribution of the soil being worked. Silicon carbide showed the highest resistance in light soil. However, the padding weld showed higher wear resistance in the other soil conditions. Nitride-bonded silicon carbide had higher wear resistance than the steels under study in all of the soils. These findings are supplemented by an analysis of the condition of the worked surfaces after friction tests. The dominant wear methods in all abrasive masses were micro-cutting and furrowing.

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