Pemulwuy Suspended Slab Crack Injection
Overhead suspended slab crack injection with minimal occupant disruption
The Challenge
Extensive cracking in the suspended concrete slab system from reinforcement placement deficiencies and concrete shrinkage required immediate stabilization. Overhead crack injection on the underside of the first-floor slab presented gravity-defying technical challenges. Traditional scaffolding would require complete ground-floor furniture removal and 2-3 week evacuation costing $12,000+ in temporary accommodation. The occupied home housed elderly residents with mobility limitations, making evacuation particularly challenging. Timeline constraints emerged from approaching Christmas holiday season with family gatherings scheduled in late December.
Our Solution
We deployed specialized overhead crack injection using low-viscosity epoxy resin engineered for upward penetration. Innovative portable injection platforms eliminated traditional scaffolding requirements, allowing elderly residents to remain comfortably in their home. Strategic injection port placement at 300mm intervals ensured complete crack penetration with pressure monitoring preventing resin escape. Room-by-room sequencing completed each space within 4-6 hours allowing progressive furniture repositioning. Low-VOC epoxy formulation minimized odor impact with air quality monitoring ensuring safe indoor environment. All 40+ cracks were photographically documented.
Results
The overhead injection stabilized all 40+ cracks with 100% penetration confirmed through structural testing. Resin bond testing demonstrated strength exceeding original concrete specifications. The portable platform approach eliminated scaffolding costs and enabled elderly residents to remain in their home throughout the 2-day timeline, avoiding $12,000+ in accommodation and relocation stress. Project completed one week before Christmas family gatherings. The $32,000 solution saved 60% versus traditional $80,000+ scaffolding approaches. Crack monitoring over 60 days showed zero reactivation.
Overhead
Technical Challenge
2-day
Completion Timeline
0
Days Evacuation Required
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