Zobrazeno 1 - 10
of 43
pro vyhledávání: '"BOGDAN-VALENTIN PAUNESCU"'
Publikováno v:
Journal of Engineering Studies and Research, Vol 29, Iss 3 (2024)
Geopolymer foam with thermal insulation properties was made by foaming the alumino-silicate mixture composed of fly ash and clay brick waste activated with alkaline activator (water glass and sodium hydroxide in aqueous solution). Other mixture compo
Externí odkaz:
https://doaj.org/article/a1d43b6d51a74b5eb4a1a20ce8723c33
Publikováno v:
Journal of Engineering Studies and Research, Vol 28, Iss 4 (2023)
New geopolymer concrete with high mechanical strength - 58.9 MPa after 28 days of curing - was experimentally made under environmental friendly and economic conditions. The high-strength-geopolymer is baed on coal fly ash and building concrete waste
Externí odkaz:
https://doaj.org/article/44724a1402764519a8b27723335f2945
Publikováno v:
Journal of Engineering Studies and Research, Vol 28, Iss 4 (2023)
Super-aluminous refractory concrete (over 94 % Al2O3) with low dosage of cement (9 %) was made, its physical, thermal, and mechanical characteristics being considered suitable for the intermediate layer of a steel casting ladle: porosity of 29.31 %,
Externí odkaz:
https://doaj.org/article/bcc04a7f2a644fb9941d5958098ca84d
Autor:
LUCIAN PAUNESCU, SORIN MIRCEA AXINTE, MARIUS FLORIN DRAGOESCU, BOGDAN VALENTIN PAUNESCU, FELICIA COSMULESCU
Publikováno v:
Journal of Engineering Studies and Research, Vol 27, Iss 4 (2021)
The paper presents experimental results obtained in the manufacturing process of porous high-strength glass foam for thermal insulation in buildings made of glass waste and kaolin clay as raw materials and dolomite as a foaming agent. The paper’s o
Externí odkaz:
https://doaj.org/article/fcf5126bc17141dabb73d42949665b22
Autor:
LUCIAN PAUNESCU, SORIN MIRCEA AXINTE, MARIUS FLORIN DRAGOESCU, BOGDAN VALENTIN PAUNESCU, FELICIA COSMULESCU
Publikováno v:
Journal of Engineering Studies and Research, Vol 27, Iss 1 (2021)
The paper presents experimental results obtained in the manufacturing process of high-strength glass foam by combined use of two solid foaming agents (calcium carbonate and graphite) in variable weight ratios. The originality of the work is applying
Externí odkaz:
https://doaj.org/article/0f058ac5f2644b4196a0155304e08a2c
Publikováno v:
Journal of Engineering Studies and Research, Vol 24, Iss 1 (2018)
Experimental results obtained in the process of manufacturing dense glass foam using the microwave energy are presented in the work. The glass foam is produced from bottle glass waste, calcium carbonate as foaming agent and borax as fluxing agent. Th
Externí odkaz:
https://doaj.org/article/eceaeced9a434ee3a1630f9abcc31689
Publikováno v:
Journal La Multiapp. 2:1-9
Abstract An innovation cold manufacturing method of glass foams is presented in the paper. Traditional foaming agents used in conventional expansion processes of glass waste at high temperature were substituted with aluminium powder in aqueous soluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c11ca4b210af04091b81373cc158cde6
https://doi.org/10.37899/journallamultiapp.v2i3.369
https://doi.org/10.37899/journallamultiapp.v2i3.369
Publikováno v:
Nonconventional Technologies Review, Vol 28, Iss 3 (2024)
A procedure for making a wooden heat-insulating product for construction applications through lignin removing is presented in this paper. The non-conventional procedure is almost similar to that known and used in the pulp and paper industry, but the
Externí odkaz:
https://doaj.org/article/dd0a6af9757a43b8b75f35779d02c227
Publikováno v:
Nonconventional Technologies Review, Vol 28, Iss 3 (2024)
A new and original dosing of alumina-silicate wastes in preparing mixture of the geopolymeric material is presented in this paper. Unlike the usual preponderant utilization of fly ash and ground blast furnace slag, the article adopted a major proport
Externí odkaz:
https://doaj.org/article/35b30059199243eebdc87599d391b1d1
Publikováno v:
Nonconventional Technologies Review, Vol 28, Iss 1 (2024)
Thermoset polymer composite was made in an original version less expensive than the known techniques, in which alumina-borosilicate glass recycled from used laboratory glass was chosen as filler into the mixture of starting materials together with po
Externí odkaz:
https://doaj.org/article/66c86a6db71f49eeaebc2a160f095862