Enhancing the mechanical strength and air permeability of corundum porous materials using shape-modified coarse aggregates

2019 ◽  
Vol 45 (8) ◽  
pp. 11027-11031 ◽  
Author(s):  
Xin Xiong ◽  
Zhoufu Wang ◽  
Xitang Wang ◽  
Hao Liu ◽  
Yan Ma
2011 ◽  
Author(s):  
Petru Ciobanu ◽  
Muhammed Hasan Aslan ◽  
Ahmet Yayuz Oral ◽  
Mehmet Özer ◽  
Süleyman Hikmet Çaglar

2015 ◽  
Vol 14 (2) ◽  
pp. 42-46
Author(s):  
G. V. Slizovskiy ◽  
L. A. Sitko ◽  
I. I. Kuzhelivskiy

The article presents the results of bone kists treatment by porous granular titanium nikelid materials. A comparative examination with standard treatment technology group demonstrated high efficiency of a proposed method. Porous granular titanium nikelid materials possess mechanical strength, optimization of regeneration  at the expense of osteoinductivity and  allow you  to  effectively fill the cavity with a complex anatomical structure.


2018 ◽  
Vol 934 ◽  
pp. 134-139 ◽  
Author(s):  
Chang Ming Wu ◽  
Yan Yang ◽  
Hui Min Sun ◽  
Da Deng ◽  
Mei Hua Chen ◽  
...  

YAG materials have a number of unique properties, the application is very extensive. In order to improving the properties of YAG porous materials, the effect of forming processing on the properties of YAG porous ceramics is investigated. Through the results and analysis, the conclusions showed that the porosity of YAG porous ceramics gradually decreased with the molding pressure increases, and the compressive strength of YAG porous ceramics shows a rising trend. The size and number of pores in the microstructure are reduced with increasing the forming pressure, there are inherently many voids in the YAG porous ceramics body at low forming pressures. The porosity of YAG porous ceramic decreases with the increase of dwell time, however, the process of extending from 5 min to 10 min is much faster than the rate of descending from 10 min to 15 min. The size and number of pores in the microstructure are reduced with extending the holding pressure time, which also makes YAG porous ceramics pose the higher mechanical strength. Through the analysis of the results, when the forming pressure is 10MPa, the porosity of YAG porous ceramics is 41.11% and the compressive strength is 5.8MPa, the porosity and compressive strength of YAG porous ceramics is better.


Ground Water ◽  
1998 ◽  
Vol 36 (4) ◽  
pp. 558-565 ◽  
Author(s):  
David S. Springer ◽  
Hugo A. Loaiciga ◽  
Stephen J. Cullen ◽  
Lome G. Everett

2018 ◽  
Vol 12 (12) ◽  
pp. 2
Author(s):  
Diógenes Magri Da Silva

A evolução dos estudos com relação às propriedades do concreto permitiu que os materiais fossem dosados de forma racionalizada, incluída a incorporação de resíduos provenientes do corte de mármores e granitos em sua produção, bem como foram desenvolvidos produtos específicos para melhorar seu desempenho. Neste trabalho produziu-se um concreto com intuito de estudar as propostas para melhorar o desempenho mecânico. Foi avaliada a influência da mistura de dois tipos de agregados graúdos de mesma origem mineralógica, a substituição de agregado miúdo por Resíduo de Corte de Mármore e Granito (RCMG) e a adição de Metaculim, fibras e aditivos visando elevar a resistência mecânica com relação ao traço de referência. Para tanto, foram realizados ensaios de resistência à tração e à compressão aos sete dias. Com os resultados obtidos foi possível perceber que a utilização de Metacaulim associada a um aditivo superplastificante apresentou o melhor desempenho, aumentando em 50% a resistência à compressão e não afetando a resistência à tração.Palavras-chave: Concreto. Desempenho Mecânico. Resíduo de Corte de Mármore e Granito. Aditivos.AbstractThe evolution of studies about properties regarding the concrete proprieties allowed that the materials were measured in a streamlined way, including the incorporation of waste originating from marble and granite cut in its production, as well as specific products were developed to improve its performance. In this work a concrete of reference was produced with the goal to study theproposals to improve its mechanical performance. It was evaluated the influence of a mixture of two types of coarse aggregates from the same mineralogical origin, the replacement of fine aggregate by Marble and Granite Cut Waste (MGCW) and addition of Metakaolin , fibers and additives in order to increasethe mechanical strength comparing to the concrete of reference. Therefore, tensile and compression tests were performed at seven days. With the results obtained it was possible to realize that the use of Metakaolin associated with super plasticizer additive exhibited the best performance, rising 50% the resistance to compression and not affecting the tensile resistance.Keywords: Concrete. Mechanical Performance. Marble and Granite Cut Waste. Additives.


Sign in / Sign up

Export Citation Format

Share Document