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Maçonnerie en briques renforcées
La maçonnerie en briques renforcées est une technique de construction avancée qui améliore l'intégrité structurelle des murs en briques en incorporant…
La maçonnerie en brique renforcée incorpore des renforts en acier dans les noyaux creux des briques ou pris en sandwich entre deux épaisseurs de maçonnerie, puis fixés avec du coulis - une combinaison fluide de ciment Portland, d’agrégats et d’eau.
La maçonnerie en brique renforcée coulée comporte des barres d’armature verticales et horizontales à l’intérieur de la cavité murale.
Les barres verticales ont un diamètre minimum de trois quarts de pouce et sont disposées à des intervalles réguliers, espacés d’au plus 48 pouces, en particulier dans les murs de plus grande longueur.
Le coulis est appliqué par étapes appelées levages, faisant référence à la quantité de coulis déposée en une procédure continue, que ce soit par des pompes à godets à commande manuelle ou des pompes mécaniques.
Le renforcement est utilisé autour des ouvertures de maçonnerie, au sommet des fondations et pour relier les sols et les plafonds.
Les luminaires permettant de fixer un plafond peuvent être directement boulonnés au mur ou établis à l’aide d’ancrages mécaniques encastrés et jointoyés dans la cavité murale.
La construction d’immeubles de grande hauteur à l’aide de murs plus minces peut être réalisée à l’aide de maçonnerie en brique armée.
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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.