Portland Clinker
Mostrando 1-12 de 20 artigos, teses e dissertações.
-
1. CONVERSION OF SPENT FAT OIL INTO LIQUID AND GASEOUS FUELS THROUGH CLINKER CATALYZED PYROLYSIS
Abstract Repeated heating of fat oil may result in the formation of highly toxic aldehyde compounds. The oils having such compounds are considered as health hazards and therefore their repeated use is banned in many countries. Since huge quantities of the used oil need urgent disposal, this work is focused on the disposal of used oil for the resource recover
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
-
2. Efeito da incorporação de resíduo de TiO2 (MNR) na formação das fases mineralógicas de clínquer Portland
Resumo O reaproveitamento de resíduos industriais para o setor da construção civil tem se mostrado uma alternativa ambiental e economicamente atrativa, principalmente para a indústria do cimento, que por muito tempo tem procurado procedimentos que efetivamente reduzam a alta energia e emissões de CO2 gerados durante a produção de clínquer. Nesse sent
Ambient. constr.. Publicado em: 2019-03
-
3. Evaluation of Portland pozzolan blended cements containing diatomaceous earth
Abstract Clinker replacement by supplementary cementitious materials (SCMs) is one strategy to reduce CO2 emissions of cement industry. Diatomaceous earth, a natural pozzolan, has been used as SCM. So, this study aimed to evaluate two Portland pozzolan blended cements with distinct content of diatomaceous earth (16DE and 49DE) and compare then with a high cl
Cerâmica. Publicado em: 2019-01
-
4. Cinza de biomassa rica em calcário como material carbonático em sistemas cimentícios de base Portland
Resumo O uso de materiais alternativos, em substituição ao clínquer, tem sido amplamente estudado, a fim de reduzir custos e minimizar os danos ambientais causados pela produção do cimento Portland. Investigou-se a influência do uso da cinza de algaroba (Prosopis juliflora), material rico em carbonato de cálcio, nos mecanismos de hidratação e forma�
Cerâmica. Publicado em: 2019-01
-
5. Fracture Properties of Geopolymer Concrete Based on Metakaolin, Fly Ash and Rice Rusk Ash
Geopolymers are exclusively mineral nature and are considered an alternative to materials based on Portland clinker, whose production accounts for about 5% of anthropogenic CO2 emissions in the world. The geopolymer cement concrete (GCC) may be prepared from natural oxide-aluminosilicates such as metakaolin (MK), or synthetic, such as fly ash (FA) together w
Mat. Res.. Publicado em: 17/11/2017
-
6. Synthesis and Mechanical Characterization of Iron Oxide Rich Sulfobelite Cements Prepared Using Bauxite Residue
The bauxite residue (BR) is the solid waste of largest generation by the aluminum industry, with a generation estimated in 10 million ton/year in Brazil. Its high alkalinity demands elevated costs to store it safely. Due to the high content of Al2O3 and Fe2O3 in BR, the present study evaluated its application for the synthesis of iron rich sulfobelite clinke
Mat. Res.. Publicado em: 01/03/2016
-
7. Biocompatibility and setting time of CPM-MTA and white Portland cement clinker with or without calcium sulfate
Objective To evaluate the biocompatibility and the setting time of Portland cement clinker with or without 2% or 5% calcium sulfate and MTA-CPM. Material and Methods Twenty-four mice (Rattus norvegicus) received subcutaneously polyethylene tubes filled with Portland cement clinker with or without 2% or 5% calcium sulfate and MTA. After 15, 30 and 60 days o
J. Appl. Oral Sci.. Publicado em: 2013-02
-
8. Avaliação da durabilidade de argamassas e pastas de cimentos do tipo Portland preparados com um clínquer contendo resíduo de bauxita como matéria-prima / Evaluation of durability of Portland cement mortars and pastes prepared with a clinker that contains bauxite residue as raw material
As estruturas de cimento Portland estão usualmente expostas a ambientes agressivos que podem levar a sua degradação. Assim, o estudo da durabilidade é muito importante para se evitar danos por falhas prematuras e gastos com reparos. Neste trabalho, foi avaliada a durabilidade de pastas e argamassas de um cimento Portland sintetizado com resíduo de bauxi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/08/2012
-
9. Cenizas de carbón sedimentadas: su efecto puzolánico en clinker Portland
The power plants generate a large amount of solid waste, known as ash, as a product of combustion of coal. There are two types of ash: fly - very fine in size- which are carried by the flow of smoke removal systems, and sedimentary particles -coarse particles - which are melted and agglomerated accumulated in the bottom of the furnace or in the boiler tubes.
Matéria (Rio J.). Publicado em: 2012
-
10. Scrap tire ashes in portland cement production
Scrap tires are not considered harmful waste, but their stocking and disposal are a potential health and environmental risk. Properly controlled calcinations at high temperatures make tire combustion an interesting alternative due to its high calorific power, comparable to that of fuel-oil. Consequently, using them as an alternative combustible material in c
Materials Research. Publicado em: 2009
-
11. Application of X-ray diffraction and Rietveld method in Portland Cement study / Aplicação da difração de raios-X e método de Rietveld no estudo de Cimento Portland
O projeto desenvolvido enfocou a aplicação da difração de raios-X e método de Rietveld (DRX-Rietveld) na caracterização e quantificação do Cimento Portland, constituindo-se em contribuição pioneira sobre o tema em âmbito nacional. Foram estudadas amostras de pozolanas naturais e artificiais, subprodutos industriais de grande disponibilidade na in
Publicado em: 2009
-
12. Influência da cal hidratada nas idades iniciais da hidratação do cimento Portland - estudo em pasta. / Influence of hydrated lime on initial stages of hydration of Portland cement - paste study.
In the last decades, scientific and technological progress has shown a significant advance in the process of obtaining lime; however, there is gap knowledge with relation to its action when employed together with Portland cement. The use of lime in finishing mix mortars has only been positively associated to the fresh state plasticity and ability to deformat
Publicado em: 2008