scholarly journals Consolidation treatments applied to ceramic tiles: are they homogeneous?

2017 ◽  
Vol 67 (325) ◽  
pp. 113 ◽  
Author(s):  
D. Costa ◽  
A. S. Leal ◽  
J. M. Mimoso ◽  
S. R.M. Pereira
Keyword(s):  
Mechanical Strength ◽  
Penetration Depth ◽  
Acrylic Resin ◽  
Measuring System ◽  
Strength Testing ◽  
Testing Methods ◽  
Ceramic Tiles ◽  
Consolidation Treatment ◽  
Extensive Evaluation ◽  
Drilling Resistance

The mass consolidation treatment of azulejos is necessary when ceramic biscuits show signs of disaggregation. Such treatment is often used as a complementary conservation technique to the reestablishment of weakened glaze-ceramic bonds. In this research, two commonly used consolidants (ethyl silicate and acrylic resin) were tested on artisanal ceramic tiles via mass consolidation and the resulting impregnation profiles were evaluated. The results indicated that after consolidation, hard zones frequently formed due to localized consolidant concentration after the polymerization and curing processes. These inhomogeneous hard zones subsequently influenced the results obtained through conventional mechanical strength testing (i.e. flexural and compression), creating a false impression of success. This research demonstrated that by using the Drilling Resistance Measuring System, impregnation characteristics such as penetration depth and distribution of consolidant could be observed that otherwise could not be discerned through the more common testing methods. As such, a more extensive evaluation of consolidation effects was achieved.

scholarly journals Influence different amount of cellulose on the mechanical strength of dental acrylic resin

2020 ◽  
Vol 743 ◽  
pp. 012044 ◽  
Author(s):  
Joanna Taczała ◽  
Chang Fu ◽  
Jacek Sawicki ◽  
Joanna Pietrasik
Keyword(s):  
Mechanical Strength ◽  
Acrylic Resin ◽  
Dental Acrylic

Research of On-Site Screening and Non-Destructive Testing for Damaged Wooden Components of the Long Corridor in Temple of Heaven

2020 ◽  
Vol 980 ◽  
pp. 321-332
Author(s):  
Xin Li ◽  
Wei Qian ◽  
Rui Xu ◽  
Li Hong Chang ◽  
Max Schubert
Keyword(s):  
Stress Wave ◽  
Resistance Testing ◽  
Non Destructive Testing ◽  
Comparison Analysis ◽  
Testing Methods ◽  
Destructive Testing ◽  
Micro Drilling ◽  
As Stress ◽  
Drilling Resistance ◽  
Non Destructive

Take the Long Corridor in Temple of Heaven as an example, some screening and testing process for its wooden components which have damaged was recommended. By pre-knocking survey, the wooden components which probably have damaged were screened out and as the important focus. Then, some non-destructive testing methods such as stress-wave testing and micro-drilling resistance testing were utilized. By the comparison, analysis and interaction correction for the testing images, the internal damaged situation of wooden components were obtained. Three typical types of wooden components were selected in this study, and some specific and suitable non-destructive testing methods which adapt to their position characteristic were discussed. Thus, it can give some useful suggestions and data supporting for the later repairing and management works.

The Effect of MIRHA and Fly Ash on Mechanical Strength and Chloride Penetration Depth of DSCC

2014 ◽  
Vol 567 ◽  
pp. 522-528
Author(s):  
Muhd Fadhil Nuruddin ◽  
Kok Yung Chang ◽  
Norzaireen Mohd Azmee
Keyword(s):  
Fly Ash ◽  
Mechanical Strength ◽  
Penetration Depth ◽  
Rice Husk Ash ◽  
Chloride Penetration ◽  
Advanced Materials ◽  
Ternary Blends ◽  
Self Compacting Concrete ◽  
Chloride Permeability ◽  
Positive Effects

Ductile self-compacting concrete (DSCC) is one of the advanced materials which combines self-compacting abilities and ductility to address the current industry problems. As the fly ash and microwave incinerated rice husk ash (MIRHA) are beneficial to the properties of concrete, it has led to a research on the effects of ternary blends of MIRHA, fly ash and cement in DSCC. Up to 20% of cement in DSCC was replaced with MIRHA and fly ash with 10% by weight respectively whilst maintaining satisfactory self-compacting abilities. The effects of MIRHA and fly ash on mechanical strength and chloride penetration depth of DSCC were determined. The control DSCC mix was compared with the DSCC mix with MIRHA and fly ash. The results shown that substitution of MIRHA and fly ash into DSCC gave positive effects, it improved the mechanical properties and chloride permeability.

The Physical, Mechanical and Thermal Analysis on Methoxy Functional Silicone Intermediate Resin Blending with Acrylic Polyol Resin

2006 ◽  
Vol 517 ◽  
pp. 111-116 ◽  
Author(s):  
B. Vengadaesvaran ◽  
R. Puteh ◽  
A.K. Arof
Keyword(s):  
Thermal Analysis ◽  
Steel Substrate ◽  
Impact Resistance ◽  
Physical Property ◽  
Acrylic Resin ◽  
Measuring System ◽  
Silicone Resin ◽  
Mechanical And Thermal Properties ◽  
Acrylic Polymer ◽  
Analysis System

Silicone modified acrylic polymer dispersion was prepared by blending methoxy functional silicone intermediate resin with acrylic polyol resin in different ratios. The physical, mechanical and thermal properties were investigated. The physical property of the blend has been carried out by using Kruss G40 contact angle measuring system, mechanical property of the blend evaluated by using impact resistance tester and adhesion tester (Cross Hatch- Cutter) and thermal analysis has been carried out by using Metler Toledo thermal analysis system DSC821. It is found that the incorporation of 50% silicone resin with 50% acrylic resin gives good adhesion on metal substrate (mild steel substrate) and optimal cross-linking is achieved.

Strength Response and Failure Analysis of Ceramic Alumina Tiles

2009 ◽  
Vol 417-418 ◽  
pp. 673-676 ◽  
Author(s):  
Dan Mihai Constantinescu ◽  
Marin Sandu ◽  
Eniko Volceanov ◽  
Matei Constantin Miron ◽  
Dragos Alexandru Apostol
Keyword(s):  
Correlation Method ◽  
Calibration Procedure ◽  
High Energy ◽  
Impact Testing ◽  
Image Correlation ◽  
Measuring System ◽  
Low Velocity Impact ◽  
Strain History ◽  
Ceramic Tiles ◽  
Low Velocity

Static loading and impact tests of ceramic alumina tiles have shown a very interesting behaviour of tough, brittle, and high energy absorbing materials. Strain gauges techniques and data acquisition were used in previous research for static and low velocity impact testing. A static-dynamic equivalence was done through a calibration procedure of the measuring system. The research is continued in this paper by using the digital image correlation method with the complete displacement and strain history acquired till the failure of the ceramic tiles of different compositions, proving the capacity of such materials to be used for particular purpose applications.

scholarly journals Evaluation and validation of technical procedure for foundry coke mechanical strength testing

2020 ◽  
Author(s):  
Bartosz Mertas ◽  
Aleksander Sobolewski ◽  
Grzegorz Rozycki
Keyword(s):  
Sample Preparation ◽  
Mechanical Strength ◽  
Physical Properties ◽  
International Standards ◽  
Strength Testing ◽  
Strength Index ◽  
Technical Procedure ◽  
Foundry Coke ◽  
Simplified Procedure ◽  
Testing And Evaluation

Abstract Foundry coke is a special type of coke with lumps size usually bigger than 100 mm. Therefore it is difficult to asses its physical properties representatively for whole lot. There exist international standards for coke sampling and testing strength index (usually Micum test). Nevertheless companies dealing with foundry coke notified problems with methodology of sampling and sample preparation for the test. Manual sampling according to ISO 18283 is very labour extensive and with connection with literally proceeding with ISO 566 gives non-representative results for foundry coke +100 mm. For this reason on the basis of these standards there was evaluated procedure for coke sampling and testing strength indexes which is more practical for plant routine use and gives more reliable results in comparison to international standard. This article presents results of work aimed at checking usability of ISO standards provisions for foundry coke testing and evaluation and validation of simplified procedure.

scholarly journals Potential of Advanced Consolidants for the Application on Sandstone Rocks: A Comparative Study

2019 ◽  
Author(s):  
Monika Remzova ◽  
Radek Zouzelka ◽  
Jaroslav Lukes ◽  
Jiri Rathousky
Keyword(s):  
Mechanical Strength ◽  
Mechanical Performance ◽  
Accelerated Weathering ◽  
Long Term Stability ◽  
Before And After ◽  
Application Potential ◽  
Degree Of Consolidation ◽  
Drilling Resistance

To achieve efficient and durable consolidation of weathered sandstone, the selection of a suitable consolidant is essential. To reasonably assess the suitability of different formulations, it is fundamental to compare their performance as a consolidant within a substrate, which reliably models the properties of deteriorated material. As a test substrate, the sandstone from quarries in Mšené in central Bohemia was selected, for its developed porosity and relatively low mechanical strength. To obtain relevant comparison of their application potential, both commercial (Remmers KSE OH and Surfapore) and self-developed consolidants were included. To test the long-term stability of each consolidant, the stone was subjected to accelerated weathering. The characterization of texture properties was based on the physical sorption of nitrogen and krypton, mercury intrusion porosimetry and water uptake. While the mechanical properties in microscale were determined by nanoindentation, the mechanical strength in macroscale before and after consolidation was measured by drilling resistance. Both commercial exhibited good mechanical performance with reasonable durability. The performance of our developed samples was comparable or, in some cases, superior. Very interesting were the consolidants containing TiO2 and ZnO nanoparticles, the former exhibiting comparable degree of consolidation and durability as commercial ones, with additional photocatalytic function, the latter unusually high increase in the mechanical strength, even after the weathering test. The diammonium hydrogen phosphate based consolidant showed exceptional durability in the weathering test, which makes it a promising product not only for carbonate but also sandstone materials.

scholarly journals ADDITION OF RICE HUSK NANOCELLULOSE TO THE IMPACT STRENGTH OF RESIN BASE HEAT CURED

2021 ◽  
Vol 4 (3) ◽  
pp. 119
Author(s):  
Muhammad Aditya Ramadhan Hasran ◽  
Dian Noviyanti Agus Imam ◽  
Bambang Sunendar
Keyword(s):  
Impact Strength ◽  
Mechanical Strength ◽  
Rice Husk ◽  
Acrylic Resin ◽  
Control Group ◽  
P Value ◽  
Test Results ◽  
Nano Cellulose ◽  
Reinforcing Material ◽  
The Impact

Background: One of the materials for denture bases is heat-cured acrylic resin (PMMA). This material still lacks impact strength as a mechanical strength property. The addition of reinforcing material is known to increase the mechanical strength of PMMA. One of the reinforcing materials added to PMMA is nano cellulose from rice husks, one of the wastes from agricultural products. Purpose: This study aims to determine rice husk nano cellulose's addition to the PMMA denture base's impact strength. Method:  The research sample consisted of six groups, each group consisting of 8 samples selected by simple random. The PI, P2, P3, P4, P5, and K groups were PMMA with 1%, 2%, 3%, 4%, 5% nano cellulose, and without nano cellulose. Result: Mean impact strength test results were 41.50 x 10-3 ± 3.891 J / mm2 for P1, 44.13 x 10-3 ± 3,980 J / mm2 for P2, 45.63 x 10-3 ± 4,438 J / mm2 for P3, 46.87 x 10-3 ± 4,824 J / mm2 for P4, 49.12 x 10-3 ± 4.016 J / mm2 for P5 and 36.25 x 10-3 ± 1.982 J / mm2 for K. One way Anova test results with p-value of 0.000 indicates differences in the six groups (p<0.05). Conclusion: This study concludes that the impact strength value of PMMA with the addition of rice husk nano cellulose has increased compared to the control group without the addition of rice husk nano cellulose.

scholarly journals New test method with a Hybrid III Anthropomorphic Dummy for Textile Safety Harnesses

2020 ◽  
Vol 28 (1(139)) ◽  
pp. 81-86
Author(s):  
Krzysztof Baszczyński
Keyword(s):  
Test Method ◽  
Strength Testing ◽  
Head Acceleration ◽  
Testing Methods ◽  
Testing Method ◽  
Experimental Stand ◽  
Hybrid Iii ◽  
Mechanical Factors ◽  
Fall Arrest ◽  
Full Body

A full body harness is a basic component of personal fall arrest equipment. It is made from webbing connected by seams and metal fittings to firmly hold and support the user’s body. The paper proposes a new method for full body harness testing using a Hybrid III anthropomorphic dummy; also the design of the experimental stand and software used are described. The method analyses the behaviour of a dummy during a fall arrest under well-defined conditions. The critical mechanical factors measured during the study presented were: the head acceleration, forces acting on the spine, the position of the dummy, the impacts of harness elements to the head, etc. The tests identified some potentially dangerous phenomena associated with falls from a height. The harness testing method developed turned out to be a valuable tool that should be applied in conjunction with existing strength testing methods.

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