Comparative study of fire resistance and acoustic performance of ceramic brick walls in concern to NBR 15575 in residential buildings in Brazil

Abstract

After the publication of NBR 15575 (ABNT, 2013) standard, it became necessary that the constructive systems used in residential buildings go through verification processes concerning the performance requirements. Considering the security requirements, it is necessary to evaluate the fire resistance of vertical sealing systems. Within the scope of habitability, the standard specifies that these systems must have an adequate acoustic performance. Regarding this scenario, this study has the purpose of evaluate the performance of two non-structural vertical sealing systems in ceramic bricks by comparing two different layouts of horizontal air gaps. Therefore, laboratory tests were performed, following the prescriptions of NBR 10636 (ABNT, 1989) and ISO 10140-2 (ISO, 2010). It was verified that the system with higher air gaps number had a better performance on fire resistance, and that the acoustic performance was very similar between the two systems.Keywords: laboratory test; vertical sealing systems; acoustic performance; fire resistance; ABNT NBR 15575-4:2014.Estudio comparativo de resistencia al fuego y desempeño acústico de paredes en bloques cerámicos en cuestión de NBR 15575 en edificios residenciales de Brasil Resumen Con la publicación de la norma NBR 15575 (ABNT, 2013), ha sido necesario que los sistemas constructivos utilizados en edificios residenciales se sometiesen a ensayos para el cumplimiento de los requisitos de desempeño. En el ámbito de los requisitos de seguridad solicitados por la norma, existe la necesidad de la evaluación de la resistencia al fuego de los sistemas de aislamiento vertical. Dentro de la habitabilidad, la norma recomienda que estos sistemas tienen un desempeño acústico adecuado. Dentro de este escenario, el objetivo de este trabajo es evaluar el desempeño acústico de dos sistemas de pared compuestos por diferentes tipos de bloques cerámicos con agujeros horizontales. Para este análisis, fueron realizados ensayos de laboratorio de acuerdo con las normas NBR 10636 (ABNT, 1989) y ISO 10140-2 (ISO, 2010). Se verificó que el sistema con mayor densidad presentó desempeño sensiblemente mejor acerca la resistencia al fuego, con desempeño prácticamente idéntico en el análisis del aislamiento acústico.Palabras clave: ensayos de laboratorio; sistema de aislamiento vertical; desempeño acústico; resistencia al fuego; ABNT NBR 15575-4:2014.

Verification of the Influence of Loading and Mortar Coating Thickness on Resistance to High Temperatures Due to Fire on Load-Bearing Masonries with Clay Tiles

“…It had four burners that used liquefied petroleum gas as fuel, two on each side, without direct contact from the flames on the sample, applied according to the standard ISO 834-1 curve [10]. This apparatus abides by standardized procedures and has been used in other research as well [1,34,35]. The horizontal displacement was measured by a mesh of 49 points, with spacing of 50 cm between each one, covering an area of 9.45 m 2 .…”

Implementação da norma de desempenho NBR 15575:2013: estudo de caso em Recife/PE

“…Por meio destes instrumentos foi possível entender detalhadamente as ações desenvolvidas e as dificuldades vivenciadas para implementar a NBR 15575:2013. GARLET et al, 2017;SILVA, 2017;MUNIZ-GÄAL et al, 2018;SILVA et al, 2018;TUBELO et al, 2018;DALBEM et al, 2019Desempenho Acústico RIBEIRO et al, 2014SCHVARSTZHAUPT;NUNES, 2014;ZANNIN, 2016;GARLET et al, 2017;PACHECO et al, 2017;SANTANA et al, 2017;KLIPPEL FILHO et al, 2018;SILVA et al, 2018Resistência ao fogo BOLINA et al, 2015BOLINA et al, 2017;HENNEMANN et al, 2017;KLIPPEL FILHO et al, 2018 Entre os documentos analisados destacaram-se padrões e registros dos sistemas de gestão da qualidade, checklists de projetos de arquitetura e engenharia e resultados de ensaios e simulações realizadas pelas empresas. Os dados obtidos foram compilados, triangulados e analisados criticamente de forma a caracterizar e permitir a avaliação da implementação da norma de desempenho.…”

Statistical Modeling of Compressive Strength of Hybrid Fiber-Reinforced Concrete—HFRC

“…Considering that, in most cases, concrete is reinforced with a single type of filament, it is possible to make use of hybrid fibers designed to withstand high temperatures. Another improvement is a significant decrease in the spalling of concrete with the incorporation of polypropylene fibers, as well as the curing time of concrete [17][18][19].…”