Zobrazeno 1 - 10
of 182
pro vyhledávání: '"Martin Keppert"'
Publikováno v:
Materials, Vol 17, Iss 20, p 5093 (2024)
Thermally activated clays (TACs) have been identified as possible supplementary cementitious materials (SCMs). To find a suitable clay and to optimise the activation process, it is necessary to determine its pozzolanic activity. However, the nature o
Externí odkaz:
https://doaj.org/article/a610dbee4f14431ab3ccc106bf4967ab
Publikováno v:
Buildings, Vol 14, Iss 10, p 3077 (2024)
The circular economy transition encompasses the identification of various available and sustainable materials to replace traditional binders in the construction industry. The utilization of water sediments represents this point as a beneficial action
Externí odkaz:
https://doaj.org/article/2fdc2de40f8d4da68ce64de402e5c583
Autor:
Dana Koňáková, Vojtěch Pommer, Kateřina Šádková, Martina Záleská, Martin Böhm, Martin Keppert, Eva Vejmelková
Publikováno v:
Developments in the Built Environment, Vol 18, Iss , Pp 100400- (2024)
A reduction in cement consumption can be achieved through the use of supplementary cementitious materials (SCMs). In addition, the utilization of more than one SCM can show a beneficial synergic performance. In this paper, a combination of calcium al
Externí odkaz:
https://doaj.org/article/60b2f906f736441688b42a595ac652a8
Autor:
Dana Koňáková, Vojtěch Pommer, Kateřina Šádková, Martin Keppert, Robert Černý, Eva Vejmelková
Publikováno v:
Journal of Materials Research and Technology, Vol 20, Iss , Pp 1512-1523 (2022)
Nowadays it is almost impossible to design a cement-based mixture without the application of some plasticizing additives. There have been developed many types of plasticizers, but they are mostly directed for Portland cement applications. In the case
Externí odkaz:
https://doaj.org/article/b3a1f485c73c45b8ac2ec5a4c481309b
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 40 (2023)
The paper describes the influence of electric current on the porosity of concrete samples after electrically accelerated tests and other electrokinetic treatments. Three different concrete mixtures consisting of CEM I 42.5R, CEM II / A-M(S-LL) 42.5R,
Externí odkaz:
https://doaj.org/article/bda1c2d5aad6461fbe88e70d31726fe1
Publikováno v:
Case Studies in Construction Materials, Vol 18, Iss , Pp e01716- (2023)
The alkali-activated materials (AAMs) design can be viewed as one of the most investigated fields in building materials engineering. However, despite numerous studies aimed at the utilization of various precursors, very limited attention is paid to t
Externí odkaz:
https://doaj.org/article/738111bb708847b68dc2ca04e4b7b3fd
Publikováno v:
Polymers, Vol 16, Iss 2, p 175 (2024)
One of the biggest challenges in the construction industry in recent times is the mitigation of the environmental impact of this sector, the reduction in dependence on primary raw materials, and the reduction in CO2 production while maintaining funct
Externí odkaz:
https://doaj.org/article/f5b90fba4e644a56a63614c86bf298f0
Publikováno v:
Polymers, Vol 15, Iss 14, p 3092 (2023)
The rationalization of material flows, together with the utilization of waste raw materials for the production of alternative binders, became a very attractive topic during the last decades. However, the majority of designed materials can be used as
Externí odkaz:
https://doaj.org/article/f381acc90d29462bb0af4ebab396dc61
Publikováno v:
Case Studies in Construction Materials, Vol 16, Iss , Pp e00900- (2022)
The stabilization of clay soils is one of the crucial problems of engineering, because it determines the long-term stability and operability of structures, especially in case of infrastructure. Present work is focused on the experimental investigatio
Externí odkaz:
https://doaj.org/article/a84fce8f590244899ef0131634b1ae2b
Autor:
Klára Kobetičová, Jana Nábělková, Martin Keppert, Igor Medveď, Zbigniew Suchorab, Robert Černý
Publikováno v:
Materials Proceedings, Vol 13, Iss 1, p 6 (2023)
The diffusion of calcium ions Ca2+ in aquatic solutions (10 g/l) was measured for two brick samples from a region in Bohemia (Vysoké Mýto, Holešov-Žopy). The experiment was performed under laboratory conditions at the ambient temperature of 20 ±
Externí odkaz:
https://doaj.org/article/341eda6b7a5340229e29599246af794d