scholarly journals Study on the Bonding Mechanism and Bonding Performance of Double Layer Fine-Surfacing Technology

2021 ◽  
Author(s):  
Xiangyan Wu ◽  
Xiangling Chen ◽  
Jianping Yang ◽  
Xin Hu ◽  
Guang Yang
Keyword(s):  
Quality Control ◽  
Wear Resistance ◽  
Double Layer ◽  
Asphalt Pavement ◽  
Pullout Test ◽  
Service Performance ◽  
Test Method ◽  
Bonding Mechanism ◽  
Bonding Performance ◽  
Development Prospects

Double layer fine-surfacing technology is a thin layer maintenance technology of pavement positive texture, which plays an important role in preventing road safety accidents. Bonding performance is the key quality control index of the double layer fine-surfacing, which directly affects its service performance and durability. In this paper, the bonding mechanism of the double layer fine-surfacing is analyzed, and the bonding strength between the double layer fine-surfacing and the old asphalt pavement surface is studied by using the pullout test method under the factors of different cement dosage and different temperature environment, and the bonding index of the double layer fine-surfacing is put forward. Experiments show that the double layer fine-surfacing technology has the characteristics of super bonding and wear resistance. It is an economical and practical maintenance technology and has broad development prospects.

A New Method to Measure the Gross Volume Density of the Asphalt Mixture Specimen - Brush Wax Method

2014 ◽  
Vol 505-506 ◽  
pp. 154-162
Author(s):  
Long Shi Peng ◽  
Min Gong ◽  
Lan Qiao
Keyword(s):  
Quality Control ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Volume Density ◽  
Test Method ◽  
The Other ◽  
New Method ◽  
Practical Significance ◽  
Technical Requirements

The gross volume density of mix asphalt material compacted specimen is a crucial indicator in the design of asphalt mixture and quality control of asphalt pavement, and it directly determines the asphalt aggregate ratio and the degree of compaction. It has a great practical significance to distinguish and choose the test method of gross volume density correctly. The specific aspects of the methods to determine gross volume density have been controversial. A new method named brush wax method is put forward for these issues. The density, priority, VMA and compactness of asphalt mixture were measured by different methods in the tests. By comparison of the new method and the other methods, the main technical indexes of asphalt mixture obtained by the brush wax method are the only one which greatly satisfies the technical requirements.

scholarly journals Impact of Variations in Test Method Parameters onIn VitroActivity of Surotomycin against Clostridium difficile and Surotomycin Quality Control Limits for Broth Microdilution and Agar Dilution Susceptibility Testing

2015 ◽  
Vol 54 (3) ◽  
pp. 749-753 ◽  
Author(s):  
Maria M. Traczewski ◽  
Jennifer Deane ◽  
Daniel Sahm ◽  
Steven D. Brown ◽  
Laurent Chesnel
Keyword(s):  
Quality Control ◽  
Clostridium Difficile ◽  
Calcium Concentration ◽  
Susceptibility Testing ◽  
Test Method ◽  
Test Parameter ◽  
Content Type ◽  
Parameter Variations ◽  
Agar Dilution ◽  
Control Limits

Test parameter variations were evaluated for their effects on surotomycin MICs. Calcium concentration was the only variable that influenced MICs; therefore, 50 μg/ml (standard for lipopeptide testing) is recommended. Quality control ranges forClostridium difficile(0.12 to 1 μg/ml) andEggerthella lenta(broth, 1 to 4 μg/ml; agar, 1 to 8 μg/ml) were approved by the Clinical and Laboratory Standards Institute based on these data.

New Fusible Alloys with Enhanced Corrosion Resistance

1997 ◽  
Author(s):  
I. Kretschmer ◽  
P. Heimgartner ◽  
R. Polak ◽  
P.A. Kammer
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Service Performance ◽  
New Family ◽  
Plasma Transferred Arc ◽  
Wear And Corrosion ◽  
Transferred Arc ◽  
Waste Burning ◽  
Wear And Corrosion Resistance ◽  
Characteristic Microstructure

Abstract Fusible Ni-B-Si alloys with a variety of alloy additions (Cr, Mo, Cu etc.) have been in service for many years as fused coatings with moderate corrosion resistance. Both gas- and water-atomised powders have been used with the spray and fuse and with the plasma transferred arc process to produce coatings. As the severity of corrosive industrial environments has increased, for example in waste burning boilers, existing alloys have not provided the desired service performance. This study was undertaken to develop a new family of alloys with improved corrosion resistance without sacrificing usability, wear resistance or cost effectiveness. A range of compositions was prepared and evaluated for deposition characteristic, microstructure, hardness, wear resistance and corrosion resistance in various media. The resulting alloy has an exceptional combination of wear and corrosion resistance in comparison to conventional alloys, when tested under comparable conditions.

scholarly journals Correlation between Surface Energy and Adhesion Force of Polyethylene/Paperboard: A Predictive Tool for Quality Control in Laminated Packaging

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Danielle M. F. Madeira ◽  
Osvaldo Vieira ◽  
Luís Antonio Pinheiro ◽  
Benjamim de Melo Carvalho
Keyword(s):  
Quality Control ◽  
Surface Energy ◽  
Adhesion Force ◽  
Paper Industry ◽  
Peel Test ◽  
Practical Method ◽  
Test Method ◽  
Predictive Tool ◽  
Contact Angle Analysis ◽  
Poor Adhesion

Poor adhesion continues to be a problem for manufacturers of laminated packaging. Therefore, the aim of this research was to study the effect of flame treatment, the type of coating, and starch application on the adhesion force of polyethylene/paperboard. The force of adhesion was determined using the peel test method; the paper surface energy was assessed by contact angle analysis; and paperboard roughness was determined by profilometer. The flame treatment did not affect the surface roughness but significantly increased the paperboard surface energy. The paperboard coated with polar latex showed much higher surface energy than the paperboard coated with nonpolar latex. The adhesion force of polyethylene presented a linear correlation to the surface energy of the paperboard. Therefore, the surface energy of paperboard is an excellent indication of its adhesion force to polyethylene, and this represents a very reliable and practical method in terms of quality control in the paper industry for producing laminated packages.

Technological Study on Interlayer Bonding of Double-Layer Porous Asphalt Pavement

2013 ◽  
Vol 405-408 ◽  
pp. 1725-1732 ◽  
Author(s):  
Guo Qi Tang ◽  
Dong Wei Cao ◽  
Ke Zhong ◽  
Xiao Qiang Yang
Keyword(s):  
Double Layer ◽  
Asphalt Pavement ◽  
Layer By Layer ◽  
Simulation Experiments ◽  
Porous Asphalt ◽  
One Step ◽  
Bonding Technology ◽  
Pavement Structure ◽  
Technological Study ◽  
Interlayer Bonding

The interlayer bonding of double-layer porous asphalt pavement will show more variations with different construction technologies, such as one-step molding by double-layer (hot on hot) paver, or paving layer by layer (hot on cold) with or without tack coat, and the variations will definitely have influences on pavement structure. Different interlayer technologies are studied in this paper on three levels including simulation experiments on specimen by indoor preparation, calculation of pavement mechanics, and construction of testing road, so that optimal interlayer bonding technology for double-layer porous asphalt pavement is discussed in combination with its effect on permeability.

scholarly journals Adaptation of the tetrazolium test method for estimating the viability of sorghum seeds

2014 ◽  
Vol 36 (2) ◽  
pp. 246-252 ◽  
Author(s):  
Tereza Cristina de Carvalho ◽  
Camila Ribeiro de Souza Grzybowski ◽  
Osvaldo de Castro Ohlson ◽  
Maristela Panobianco
Keyword(s):  
Quality Control ◽  
Filter Paper ◽  
Seed Quality ◽  
Seed Viability ◽  
Test Method ◽  
Accurate Assessment ◽  
Efficient Procedure ◽  
Paper Towels ◽  
Direct Immersion ◽  
Tetrazolium Test

The tetrazolium test is part of internal programs of seed quality control because it allows a quick, reliable and accurate assessment of seed viability. The purpose of this study was to determine, among the various methodologies suggested in the literature, a practical and efficient procedure for carrying out the tetrazolium test in sorghum seeds, with a view toward a rapid estimate of their viability. Four seed lots of the simple hybrid Buster were used, testing two forms of seed pre-conditioning (direct immersion in water and between moistened paper towels); two types of preparation (longitudinal cut of the seed through the embryo with immersion of one of the halves in the tetrazolium solution or placement of the two halves on filter paper moistened with tetrazolium solution); two forms of staining (on paper and with direct immersion in the solution) and three concentrations of tetrazolium solution (0.1%, 0.5% and 1.0%). The tetrazolium test may be efficiently conducted for sorghum seeds through pre-conditioning between paper towels for 18 hours at 20 ºC, with immersion staining of one half of the seed in tetrazolium solution at 0.1% for three hours at 40 ºC.

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