Crack Control Joints: Durable Concrete Design for Tropical Climates | Structural Classroom
Автор: Kasper Wong
Загружено: 2025-06-02
Просмотров: 6
In this episode of Structural Classroom, Kasper explains everything you need to know about planning and placing crack control joints under Malaysia’s hot, humid conditions. You’ll learn:
Why control joints are essential to guide inevitable cracks into neat, straight lines
The three main joint types—contraction, isolation (expansion), and construction joints—and when to use each
How to determine joint spacing (20–24× thickness on-grade, 30–36× for reinforced/elevated slabs) in a tropical climate
The correct depth (¼ to ⅓ slab thickness), timing (4–6 hours after placement), and profile for saw cuts
Best practices for sealing joints with backer rod and UV-resistant polyurethane sealant
How to install isolation joints (full-depth foam) around columns, walls, and penetrations to accommodate thermal and moisture movement
Tips for establishing construction joints: roughening, keyways, bonding agents, and waterstops under high-heat conditions
Curing strategies—mist spraying, wet burlap, and white membrane compound—to prevent random shrinkage cracks
By the end of this video, you’ll have a step-by-step plan to ensure long-lasting, crack-free slabs and decks in tropical climates.
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