Buscar
Mostrando ítems 11-20 de 738
A 100% waste-based alkali-activated material by using olive-stone biomass ash (OBA) and blast furnace slag (BFS)
(2017-09-15)
This study presents the use of olive-stone biomass ash (OBA) as an alkali source in alkali-activated materials (AAM) based on blast furnace slag (BFS). The OBA was physically and chemically characterized. It presented high ...
Biomass ashes to produce an alternative alkaline activator for alkali-activated cements
(2022-02-01)
In the last decade, herbaceous and agricultural biomass have been used as an alternative energy source. As consequence, large amounts of residual ashes containing potassium (potassium-rich ashes) have been generated. Olive ...
Influence of calcium additions on the compressive strength and microstructure of alkali-activated ceramic sanitary-ware
(2018-07-01)
The ceramic sanitary-ware market generates large amounts of waste, both during the production process and due to construction and demolition practices. In this paper, the effect of different amounts and calcium sources ...
Compressive Strength and Microstructure of Alkali-Activated Blast Furnace Slag/Sewage Sludge Ash (GGBS/SSA) Blends Cured at Room Temperature
(2017-07-01)
In the present work, ground granulated blast furnace slag (GGBS) and sewage sludge ash (SSA) blends were assessed for the production of alkali-activated pastes and mortars. Percentages of SSA to substitute GGBS ranged from ...
Análise do cimento álcali ativado quando sujeito à reação álcali-agregado
(Universidade Tecnológica Federal do ParanáPato BrancoBrasilDepartamento Acadêmico de Construção CivilEngenharia CivilUTFPR, 2016-11-22)
The growing environmental concern has stimulated studies for the development of alternative cements, with reduced greenhouse gas emissions in its manufacture. One of these is the alkali activated cement (CAT), which in ...
Theoretical study of the diffusion of alkali metals on a Cu(111) surface
(Elsevier, 1997)
We present a theoretical study of the diffusion of Li, Na and K on a Cu(111) surface. Various diffusional paths are identified and characterized in terms of kinetic parameters such as diffusion constants and activation ...
Use of ceramic sanitaryware as an alternative for the development of new sustainable binders
(2016-01-01)
Large amounts of ceramic sanitary-ware waste are generated in both the production process and construction and demolition practices. This waste contains amorphous phases that may react with the Portlandite that originates ...
Design and properties of 100% waste-based ternary alkali-activated mortars: Blast furnace slag, olive-stone biomass ash and rice husk ash
(2020-01-10)
Alkali-activated cements (AACs) technology is being widely investigated as a replacement for ordinary Portland cement (OPC) for environmental benefits. Blast furnace slag (BFS) is one of the most well known precursors used ...