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Alvenaria de tijolos reforçados
A alvenaria de tijolos reforçados é uma técnica de construção avançada que melhora a integridade estrutural das paredes de tijolos ao incorporar refor…
A alvenaria de tijolo reforçado incorpora reforços de aço dentro dos núcleos ocos dos tijolos ou imprensados entre dois wythes de alvenaria, depois fixados com argamassa - uma combinação fluida de cimento Portland, agregado e água.
A alvenaria de tijolo armado rebocada apresenta barras de reforço verticais e horizontais dentro da cavidade da parede.
As barras verticais têm um diâmetro mínimo de três quartos de polegada e são dispostas em intervalos consistentes, no máximo 48 polegadas de distância, particularmente em paredes de maior comprimento.
Aargamassa é aplicada em etapas conhecidas como elevadores, referindo-se à quantidade de argamassa depositada em um procedimento contínuo, seja por bombas de caçamba operadas manualmente ou bombas mecânicas.
O reforço é utilizado em torno de aberturas de alvenaria, no topo de fundações e para conectar pisos e tetos.
As luminárias para fixação de um teto podem ser aparafusadas diretamente à parede ou estabelecidas usando âncoras mecânicas embutidas e rebocadas dentro da cavidade da parede.
A construção de arranha-céus com paredes mais finas pode ser realizada com alvenaria de tijolos reforçados.
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Q1: What is reinforced brick masonry and how does it work?
Reinforced brick masonry incorporates steel reinforcement bars within hollow brick cores or between masonry wythes, then secures them with grout—a fluid mixture of Portland cement, aggregate, and water. This technique combines vertical and horizontal steel bars to enhance structural integrity, allowing construction of high-rise buildings with thinner, more robust walls.
Q2: What are the specifications for vertical reinforcement bars in reinforced brick masonry?
Vertical reinforcement bars must have a minimum diameter of three-fourths of an inch and are spaced at consistent intervals not exceeding 48 inches apart, particularly in longer walls requiring additional strength. These bars are embedded in hollow cores or collar joints and work with horizontal bars to provide comprehensive structural reinforcement throughout the wall system.
Q3: How is grout applied in reinforced brick masonry construction?
Grout is applied in stages called lifts, referring to the quantity of grout deposited in one continuous procedure. Application occurs either manually using bucket pumps or through mechanical pumps, ensuring thorough coverage and bonding of steel reinforcement to the brick and mortar structure.
Q4: Where is reinforcement typically placed in reinforced brick masonry walls?
Reinforcement is strategically positioned around masonry openings, atop foundations and parapet walls, and at connections between floors and ceilings. These critical locations require additional strength to handle structural loads and prevent failure at vulnerable points in the wall system throughout the structure.
Q5: How are ceiling and floor fixtures secured to reinforced brick masonry walls?
Fixtures can be directly bolted to reinforced masonry walls or attached using mechanical anchors embedded and grouted within wall cavities. This dual approach provides flexible, reliable connections for structural elements while maintaining the integrity and stability of the reinforced masonry system.
Q6: What advantages does reinforced brick masonry offer for high-rise construction?
Reinforced brick masonry enables construction of high-rise buildings using thinner walls while maintaining structural robustness and durability. The combination of steel reinforcement and grout bonding provides the necessary strength and stability for taller structures, broadening architectural possibilities and improving overall construction efficiency.
Q7: What is the composition of grout used in reinforced brick masonry?
Grout is a fluid mixture composed of Portland cement, aggregate, and water, serving as the bonding agent that secures steel reinforcement to brick and mortar. This composition ensures proper adhesion and structural integration of all reinforced masonry components throughout the wall system.