Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Ronaldo Alves de Medeiros-Junior"'
Autor:
Neusa Aparecida Munhak Beltrame, Vitor Lorival Kudlanvec Junior, Rafaela Souto, Amanda Venancio Trisotto, João Cláudio Nascimento da Silva, Ronaldo Alves de Medeiros-Junior
Publikováno v:
Revista IBRACON de Estruturas e Materiais, Vol 17, Iss 1 (2024)
Abstract This research aimed to evaluate the resistance to sodium and magnesium sulfates of geopolymeric mortars, prepared with different proportions of alkaline activators of silicate and sodium hydroxide (Ma), Na2O content in relation to metakaolin
Externí odkaz:
https://doaj.org/article/fc8f247826b240fc961c7d58c22ab19c
Autor:
Allan Guimarães Borçato, Neusa Aparecida Munhak Beltrame, Tassiane Apolinário de Oliveira, Ronaldo Alves de Medeiros-Junior
Publikováno v:
Revista IBRACON de Estruturas e Materiais, Vol 18, Iss 1 (2024)
Abstract This study investigated the effect of dolomitic lime incorporation on the microstructure and mechanical properties of metakaolin-based geopolymers activated by alkaline solution. Five geopolymer mixtures were prepared with the addition of 0.
Externí odkaz:
https://doaj.org/article/390650e8e81f479b85f6322e497b3c7b
Autor:
Neusa Aparecida Munhak Beltrame, Ronaldo Alves de Medeiros-Junior, Roberto Luiz Dias, Franky Bruno Witzke
Publikováno v:
Revista IBRACON de Estruturas e Materiais, Vol 17, Iss 1 (2023)
Abstract Carbonation curing differs from weathering carbonation since it is performed intentionally at the early ages of cement hydration. This cure involves applying different levels of CO2 (5% to 99%) to concrete for a short period of time, usually
Externí odkaz:
https://doaj.org/article/a13ac51ca04844d4a61921197e95578f
Autor:
Ronaldo Alves de Medeiros-Junior, Guilherme da Silva Munhoz, Marcelo Henrique Farias de Medeiros
Publikováno v:
Revista ALCONPAT, Vol 9, Iss 2 (2019)
This research confronts the following concrete properties: water absorptions (by immersion and capillarity), electrical resistivity and compressive strength. Concrete mixtures with two types of cement were tested. Results showed that concretes with h
Externí odkaz:
https://doaj.org/article/4b02443941a1477b855c23993c758623
Autor:
Neusa Aparecida Munhak Beltrame, Ronaldo Alves de Medeiros-Junior, Roberto Luiz Dias, Franky Bruno Witzke
Publikováno v:
Revista IBRACON de Estruturas e Materiais, Volume: 17, Issue: 1, Article number: e17110, Published: 26 MAY 2023
Carbonation curing differs from weathering carbonation since it is performed intentionally at the early ages of cement hydration. This cure involves applying different levels of CO2 (5% to 99%) to concrete for a short period of time, usually followed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ae6ab588c3f13c1c5e9207b29328c7f
https://doi.org/10.1590/s1983-41952024000100010
https://doi.org/10.1590/s1983-41952024000100010
Autor:
Thiago Alessi Reichert, Carlos Eduardo Tino Balestra, Daniele Alves Oliveira Balestra, Ronaldo Alves de Medeiros-Junior
Publikováno v:
Journal of Building Pathology and Rehabilitation. 8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9584f4ef6676540d367cbde688be144
https://doi.org/10.1007/s41024-023-00286-2
https://doi.org/10.1007/s41024-023-00286-2
Publikováno v:
Biblioteca Digital de Teses e Dissertações do ITAInstituto Tecnológico de AeronáuticaITA.
Diferentes estudos abordam a durabilidade das estruturas de concreto, fundamentados em modelos que simulam os mecanismos de penetração dos cloretos no concreto. Apesar de grande parte desses modelos ser baseada na determinação de um coeficiente d
Publikováno v:
Biblioteca Digital de Teses e Dissertações do ITAInstituto Tecnológico de AeronáuticaITA.
As estruturas de concreto localizadas em meio ambiente marinho sofrem processos de degradação principalmente pela presença do agente agressor cloreto. Tal agente, proveniente da água do mar e transportado através do aerosol marinho, é um dos pr
Publikováno v:
Revista IBRACON de Estruturas e Materiais, Vol 16, Iss 5 (2023)
abstract: The shrinkage of cementitious materials is a complex phenomenon of volume reduction that can result in cracking, affecting the durability of these materials. The Brazilian standard ABNT NBR 15261 addresses long-term shrinkage without emphas
Externí odkaz:
https://doaj.org/article/26b28949dd3b4106be53909b5e8b3277