Study of pore structure of refractory concrete with ceramic powder addition

2019 ◽  
Author(s):  
Ondřej Holčapek ◽  
Jan Machovec ◽  
Jaroslav Pokorný
Keyword(s):  
Pore Structure ◽  
Refractory Concrete ◽  
Ceramic Powder ◽  
Powder Addition

Basic and Hygric Properties of Concrete Containing Fine Ceramic Powder

2014 ◽  
Vol 897 ◽  
pp. 188-191 ◽  
Author(s):  
Pavel Reiterman ◽  
Ondřej Holčapek ◽  
Monika Čáchová ◽  
Filip Vogel ◽  
Marcel Jogl ◽  
...  
Keyword(s):  
Ceramic Powder ◽  
Pozzolanic Reaction ◽  
Experimental Program ◽  
Hardened Concrete ◽  
Capillary Porosity ◽  
Fine Ceramic ◽  
Powder Addition ◽  
Hygric Properties ◽  
Positive Effect ◽  
Fine Ceramic Powder

The motivation for utilization of active admixtures in concrete lies primarily in a positive effect on properties of hardened concrete with regard to its durability. Fine parts complement the grain size distribution curve, but also due to subsequent hydration arise phases with better resistance to aggressive substances from surrounding environment. Process of pozzolanic reaction is also associated with a reduction in open capillary porosity, causing a gradual reduction of the permeability of concrete. The paper presents an experimental program focused on the monitoring of evolution of basic and hygric properties of concrete with fine ceramic powder addition.

scholarly journals Four-years influence of waste brick powder addition in the pore structure and several durability-related parameters of cement-based mortars

2021 ◽  
Vol 306 ◽  
pp. 124839
Author(s):  
Rosa María Tremiño ◽  
Teresa Real-Herraiz ◽  
Viviana Letelier ◽  
José Marcos Ortega
Keyword(s):  
Pore Structure ◽  
Brick Powder ◽  
Powder Addition

Pore structure and permeability of concrete with high volume of limestone powder addition

2018 ◽  
Vol 338 ◽  
pp. 416-424 ◽  
Author(s):  
Chenzhi Li ◽  
Linhua Jiang ◽  
Ning Xu ◽  
Shaobo Jiang
Keyword(s):  
Pore Structure ◽  
High Volume ◽  
Limestone Powder ◽  
Powder Addition

Fracture Properties of Cement Pastes Modified by Fine Ground Ceramic Powder

2014 ◽  
Vol 1054 ◽  
pp. 182-187 ◽  
Author(s):  
Pavel Reiterman ◽  
Ondřej Holčapek ◽  
Kirill Polozhiy ◽  
Petr Konvalinka
Keyword(s):  
Ceramic Powder ◽  
Cement Composites ◽  
Cement Pastes ◽  
Fine Ceramic ◽  
Fracture Properties ◽  
Final Fracture ◽  
Powder Addition ◽  
Mechanical And Fracture Properties ◽  
Fine Ceramic Powder ◽  
Previous Assumption

Paper deals with utilization of fine ground ceramic powder as a supplementary cement addition. Present work follows previous research focused on the basic physical and hygric properties of cement composites with ceramic powder application. Present work introduce rheological, mechanical and fracture properties of cement pastes investigated during maturation at time 7 days. Presented data are added by results of pore characteristic having essential impact to final properties. Obtained data confirm previous assumption of retarding of hydration process, but final fracture properties indicate increased durability of cement pastes with fine ceramic powder addition.

scholarly journals Influence of Waste Glass Powder Addition on the Pore Structure and Service Properties of Cement Mortars

2018 ◽  
Vol 10 (3) ◽  
pp. 842 ◽  
Author(s):  
José Ortega ◽  
Viviana Letelier ◽  
Carlos Solas ◽  
Marina Miró ◽  
Giacomo Moriconi ◽  
...  
Keyword(s):  
Pore Structure ◽  
Glass Powder ◽  
Waste Glass ◽  
Service Properties ◽  
Waste Glass Powder ◽  
Cement Mortars ◽  
Powder Addition

Monofilamentary Ag/Bi:2212 Tapes – Effects of Silver Powder Addition

2005 ◽  
Vol 498-499 ◽  
pp. 316-318
Author(s):  
Dayse Iara dos Santos ◽  
Durval Rodrigues ◽  
Elisabete A. A. Rubo ◽  
Eliana Cursino
Keyword(s):  
Power Plants ◽  
Silver Powder ◽  
Ceramic Powder ◽  
Ceramic Materials ◽  
Ceramic Composites ◽  
Silver Addition ◽  
The Core ◽  
Industry Applications ◽  
Powder Addition ◽  
Superconducting Ceramic

The Bi-Sr-Ca-Cu-O system has been one of the most studied superconducting ceramic materials for industry applications. The most of the studies with this aim are on silver/ceramic composites, due to the benefits and great compatibility of this metal with the oxide. Tapes made by the powder in tube (PIT) method have been successfully tested in pilot power plants in many countries but in Brazil. In this paper, 5, 10, and 20-wt% silver powders are introduced to compose the core of the tape along with the Bi:2212 ceramic powder. The results of electrical experiments are compared with those made with no silver addition Ag tapes. The best current density, at 60 K and no applied magnetic field, was found for the 10-wt% silver proportion, doubling the value obtained for the tape with no silver in the core.

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