Buscar
Mostrando ítems 31-40 de 94
Estudo do potencial do cimento supersulfatado na mitigação da reação álcali agregado pelo método acelerado das barras de argamassa
(Universidade Tecnológica Federal do ParanáPato BrancoBrasilPrograma de Pos-Graduação em Engenharia CivilUTFPR, 2021-08-27)
The RAA is an expansive reaction between alkaline ions, mainly from clinker, and reactive minerals present in the aggregates. The alumina in the cement forms a protective film that surrounds the aggregate and makes it ...
Evaluation of cytotoxicity, antimicrobial activity and physicochemical properties of a calcium aluminate-based endodontic material
(Univ Sao Paulo Fac Odontologia BauruBauru-spBrasil, 2014)
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 ...
Estudio de la conversión del cemento aluminoso
(Universidad Andrés Bello, 2004)
Esta investigación evaluará la pérdida de resistencia mecánica a largo plazo que presentan los cementos de aluminato de calcio. Este fenómeno que sufren los cementos aluminosos se conoce con el nombre de conversión. Esta ...
Revisiting CA6 formation in cement-bonded alumina-spinel refractory castables
(Elsevier, 2017-07-08)
This work revisits the proposed mechanisms presented in the literature for CA6 formation in Al2O3-MgO and Al2O3-MgAl2O4 castables bonded with calcium aluminate cement. New experimental tests, thermodynamic simulations and ...
Calcium silicate-based cements cause environmental stiffness and show diverse potential to induce osteogenesis in human osteoblastic cells
(2021-12-01)
Calcium silicate-based cements differ markedly in their radiopacifiers and the presence of calcium sulfate, aluminates, carbonates and other components that can affect their biological properties. This study aimed to compare ...
Scaffolds’ production based on calcium aluminate blends and their biological properties
(2019)
© 2019, Sociedade Brasileira de Engenharia Biomedica.Purpose: Scaffolds are artificial structures that provide a temporary template to withstand mechanical loads in vivo during the process of bone regeneration. They should ...
The use of thermogravimetric analysis to characterize the metallic slag aggregates in structural concrete
(2020-01-01)
Structural concretes must have a set of chemical characteristics to present a satisfactory resistance to the degradation in environment conditions. Besides the several types of mineralogical compositions, the calcium-rich ...
Systemic effect of mineral aggregate based cements: histopathological analysis in rats
(Univ Sao Paulo Fac Odontologia Bauru, 2017-11-01)
Objective: Several studies reported the local tissue reaction caused by mineral aggregate-based cements. However, few studies have investigated the systemic effects promoted by these cements on liver and kidney when directly ...