Slab On Ground

Post tensioning brings a number of unique benefits to the design and construction of slab on ground applications.

Common issues involved with the construction of slabs on ground include:

• Any mass pour concrete is subject to creep and shrinkage during curing, which can lead to cracking if uncontrolled.
• Slabs are particularly susceptible to cracking. The most common way to control this is with regular joints, either saw cuts or full expansion joints at typically 6-8m spacing.
• This leads to both large construction costs, up to 20% of initial construction value, and significant long-term maintenance costs.
• Joints also place limits on use of space.

By utilising a post tensioned slab on ground solution, the following benefits can be achieved:

• Significant reduction in joints bringing cost savings and improvements to operational performance, particularly in slabs with high traffic movement.
• Standard tendon lengths are 60m, compared to joint spacing of conventionally reinforced slab of 6-8m.
• 2,000-3,000sqm joint free pours are typical, up to 6,000sqm has also been achieved.
• Reduction in long term maintenance requirements due to reduced joint requirements, indicatively up to 60% cost saving.
• Increased loading capacity or reduction in slab thickness with significant material savings.
• Increased durability.

Typical applications for post-tensioning slabs on ground include:

• Logistics warehouses.
• Distribution centres.
• Bulk solid stores.
• Maintenance facilities.
• Refrigeration stores.
• Container handling facilities.
• Special applications.