Aderência de revestimento de argamassa em bloco de concreto celular autoclavado

Detalhes bibliográficos
Ano de defesa: 2012
Autor(a) principal: Pagani, Angelo
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal do Espírito Santo
BR
Mestrado em Engenharia Civil
Centro Tecnológico
UFES
Programa de Pós-Graduação em Engenharia Civil
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
624
Link de acesso: http://repositorio.ufes.br/handle/10/3937
Resumo: This study aims at deepening investigations on adherence of mortar coats to autoclaved aerated concrete block.Among the materials used for sealing, autoclaved aerated concrete block is the one with the lowest thermal transmittance rate and lowest density, which qualifies it to be employed and also lead to reduction in costs of building structures. We investigated characteristics of autoclaved aerated concrete blocks such as apparent dry density, compressive strength, water initial and total absorption, and substrate adherence strength. Although it is a laboratorial test, we adopted solutions that can be used in the construction site, such as water spraywashing the substrate to eliminate dust that can compromise adherence; wetting coat mortar with water 12 hours after curing begins so as to avoid early evaporation of water; and wetting substrate before applying coat mortar. Fresh state mortar consistency, water retention, exudation, mass density and air content were investigated. For hardened mortars, mass density, bending tensile strength, compressive strength, wicking and wicking coefficient were assessed. In its fixed state, substrate was assessed for water absorption through pipe method and pull-off adherence strength. Study mortar mixes had variations in each of their components (cement, lime and sand) and mixing water was constant in relation to the amount of sand, with a small variation in the consistency rate. Test results showed that pull-off adherence strength that autoclaved aerated concrete blocks can stand is higher than those set by coating adherence standards, and that washing and wetting treatments of autoclaved aerated concrete blocks improve adherence of mortars to substrates.