Comparison Of Different Etching Agents And Repair Materials Used On Feldspathic Porcelain

2010 ◽  
pp. 137-146
Author(s):  
P. K. Lundvall ◽  
H. J. Rønold ◽  
K. Ekstrand ◽  
E. Ruyter
Keyword(s):  
Repair Materials ◽  
Feldspathic Porcelain ◽  
Materials Used

Comparison of Different Etching Agents and Repair Materials Used on Feldspathic Porcelain

2009 ◽  
Vol 23 (7-8) ◽  
pp. 1177-1186 ◽  
Author(s):  
Per Kristian Lundvall ◽  
Eystein Ruyter ◽  
Hans Jacob Rønold ◽  
Karl Ekstrand
Keyword(s):  
Repair Materials ◽  
Feldspathic Porcelain ◽  
Materials Used

scholarly journals UHPFRC for concrete repair

2018 ◽  
Vol 199 ◽  
pp. 07007
Author(s):  
Alexandrine Maltais ◽  
Nikola Petrov ◽  
Michel Thibault ◽  
Benoit Bissonnette
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Energy ◽  
Climatic Conditions ◽  
Fiber Reinforced Concrete ◽  
Repair Materials ◽  
High Performance Fiber ◽  
Very High Energy ◽  
Materials Used

As part of the St. Lawrence Seaway lock maintenance, the current practice is to perform concrete repairs entirely with reinforced concrete, using either ordinary concrete or high performance concrete (HPC) mixtures. However, with the recent advances in the field of ultra-high performance fiber-reinforced concrete (UHPFRC), the use of this new material is considered in view of improving the overall performance of repairs. The goal is to implement repairs capable of dissipating a lot of energy before breaking when a ship hits a concrete lock wall. Numerous rehabilitation materials and methods have been experimented in the past. They all were unsuccessful due to inadequate shear and impact strength characteristics of the repair materials used. These needs can be efficiently fulfilled with UHPFRC, with their superior mechanical properties and very high energy-dissipation ability. To analyze the in-situ behavior of UHPFRC, two main mixture designs were investigated: a 160-MPa mixture containing 3% of steel fibers and a 120-MPa mixture containing 3.5% of a steel fiber blend. Thick repairs with average depths of 700 mm were carried out during the winter shut down period, in very harsh climatic conditions (-12 °C, gusty wind). The performance exhibited by the repairs after a full year shows that UHPFRCs can withstand very effectively the impacts from the transiting vessels

scholarly journals Experimental Evaluation of the Durability of Concrete Repair Materials

2021 ◽  
Vol 11 (5) ◽  
pp. 2303
Author(s):  
Tae-Kyun Kim ◽  
Jong-Sup Park
Keyword(s):  
Structural Integrity ◽  
Physical Factors ◽  
Operating Life ◽  
Freeze Thaw ◽  
Repair Materials ◽  
Chloride Attack ◽  
Materials Used ◽  
Strength And Durability ◽  
Corrosion Of Steel

Concrete structures crack as they age due to deterioration phenomena such as carbonation, chloride attack, and freeze–thaw. Cracks may also occur due to corrosion of steel reinforcements, which can rapidly degrade the structural integrity. Therefore, this study uses strength and durability tests to examine the materials used to repair cracks in concrete; namely, epoxy, impregnant, and epoxy/impregnant. The results show that epoxy has the greatest strength; epoxy/impregnant is most effective for repairing carbonation damage; impregnant is most effective for repairing chloride damage; epoxy and epoxy/impregnant are most effective for repairing freeze–thaw damage, depending on environmental and physical factors, as well as the crack width. These results can be used to improve the quality of repairs and increase the safe operating life of structures.

scholarly journals The Evolution of Dental Materials over the Past Century: Silver and Gold to Tooth Color and Beyond

2019 ◽  
Vol 98 (3) ◽  
pp. 257-265 ◽  
Author(s):  
S.C. Bayne ◽  
J.L. Ferracane ◽  
G.W. Marshall ◽  
S.J. Marshall ◽  
R. van Noort
Keyword(s):  
Time Course ◽  
Dental Materials ◽  
Dental Amalgam ◽  
Dental Composite ◽  
Past Century ◽  
Dental Ceramics ◽  
Tooth Color ◽  
The Past ◽  
Repair Materials ◽  
Materials Used

The field of dental materials has undergone more of a revolution than an evolution over the past 100 y. The development of new products, especially in the past half century, has occurred at a staggering pace, and their introduction to the market has been equally impressive. The movement has mostly come in the area of improved esthetics, marked by the gradual replacement of dental amalgam with dental composite and all-metal and porcelain-fused-to-metal indirect restorations with reinforced dental ceramics, all made possible by the rapid improvements in dental adhesive materials. This article covers the time course of dental materials development over the past century in which the Journal of Dental Research has been published. While there have been advances in nearly all materials used in the field, this article focuses on several areas, including dental amalgam, dental composites and light curing, dental adhesives and dental cements, ceramics, and new functional repair materials. A few short statements on future advances will be included at the end.

scholarly journals Summary and application analysis of clinical herniorrhaphy mesh materials

2019 ◽  
Vol 9 (4-s) ◽  
pp. 714-720
Author(s):  
Yan Liu ◽  
Yanbo Zuo ◽  
Zhengwei Jiao ◽  
Xiaoshi Jin
Keyword(s):  
Complete Healing ◽  
Medical Community ◽  
Abdominal Hernia ◽  
Chinese Journal ◽  
Composite Repair ◽  
Anatomical Basis ◽  
Repair Materials ◽  
Pubmed Database ◽  
Application Analysis ◽  
Materials Used

It is widely believed in the medical community that the pathological and anatomical basis for the occurrence of external abdominal hernia is the fascia defect, and how to correctly deal with this kind of fascia defect is the key point in the treatment of external abdominal hernia. Theodore Billorth famously said that if we could artificially create dense and tough tissues like fascia and tendons, the secret to the complete healing of hernia would be solved. These similar theories largely guide the research and practice in the treatment of external abdominal hernia. along with the breakthrough progress in the mesh treatment of external abdominal hernia, According to the chemical composition and biological characteristics, the patch materials can be divided into non-absorbable materials, absorbable materials, composite repair materials and biological materials. Methods In this paper, Pubmed database and Chinese journal full-text database literatures were searched,and all mesh materials used in inguinal hernia repair were comprehensively studied, summarized and analyzed in clinical application. Keywords: external abdominal hernia; patch material; conclusion; application

Study on the Conservation and Restoration of Marine Archaeological Porcelains - A Instructive Case of Traditional Crafts from Yue Kiln

2021 ◽  
Vol 7 (5) ◽  
pp. 3777-3786
Author(s):  
Tao Ma ◽  
Xiaodan Liu ◽  
Haiyan Zhu ◽  
Dan Yang ◽  
Zhijun Pan
Keyword(s):  
Chemical Properties ◽  
Practical Work ◽  
Salting Out ◽  
Production Methods ◽  
Repair Materials ◽  
Materials Used ◽  
Physical And Chemical ◽  
Instructive Case ◽  
Selection Of ◽  
And Chemical Properties

It is generally acknowledged that porcelains, among portable antiquities, boast relatively stable physical and chemical properties. However, marine archaeological porcelains are likely to suffer from deterioration such as salting out, attachment and corrosion due to the complicated burial environments. In the course of conservation and restoration, some natural diseases are easily mistaken for production defects. In order to preserve as much historical information about the antiquities as possible during the clean — up process, we systematically examined traditional porcelain production methods used at the Yue kiln, and conducted further research on typical production flaws that can easily be confused with the natural diseases. Based on these traditional methods and compositional characteristics of porcelains, we provide some guidance on the selection of clean —up methods and repair materials used for porcelains. From the perspective of identifiability and ageing resistance, this paper focuses on discussing the restoration scale of porcelains exhibited in museums. Based on our practical work, we discuss some problems that should be noticed in restoration and also provide an outlook for the future practical work and research.

scholarly journals Sealing ability of three different materials to repair furcation perforations using computerized fluid filtration method

2021 ◽  
Vol 15 (3) ◽  
pp. 183-187
Author(s):  
Cemre Koç ◽  
Berna Aslan ◽  
Zuhal Ulusoy ◽  
Hasan Oruçoğlu
Keyword(s):  
Calcium Silicate ◽  
Time Interval ◽  
Fluid Filtration ◽  
Filtration Method ◽  
Sealing Ability ◽  
Repair Materials ◽  
Mandibular Molar ◽  
Significant Difference ◽  
The Difference ◽  
Materials Used

Background. The present study aimed to evaluate the sealing ability of three different calcium silicate-based materials in furcation perforations. Methods. Seventy-six human mandibular molar teeth were selected. Perforations were created in the center of the pulp chamber floor. The experimental teeth were randomly divided into three groups (n=22). Perforations were repaired with MTA Angelus, Endocem MTA, or EndoSequence BioCeramic Root Repair Material Fast Set Putty (BC-RRM Putty). Microleakage of the different repair materials to be tested was measured by computerized fluid filtration method at 24- and 72-hour intervals. Results. For each time interval, no statistically significant difference was observed between the groups. For Endocem MTA and BC-RRM Putty groups, the difference between the leakage values measured at both periods was not statistically significant (P>0.05). However, there was a significant difference for the MTA Angelus group (P<0.05). Conclusion. All the calcium silicate-based materials used in the present study showed similar performance in repairing furcation perforations at 24- and 72-hour intervals.

Deformation Replication

1970 ◽  
Vol 28 ◽  
pp. 280-281
Author(s):  
J. Temple Black
Keyword(s):  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Rake Face ◽  
Orthogonal Machining ◽  
Aluminum Chips ◽  
Before And After ◽  
Materials Used ◽  
Glass Knife ◽  
Very High

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.

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