Calumex QX-P

Calumex® QX-P is an additive to Portland cement, specially developed as a high-performance shrinkage-reducing agent based on calcium sulfoaluminate (C.S.A.). Due to its mineral composition, ettringite is formed when combined with Portland cement. The micron-sized ettringite crystals formed during the cement hardening mitigate the thermal and gel hardening shrinkage through expansion.

The expansion that occurs is part of the strength development and not to be confused with the expansion that occurs before the strength development, e.g., gas evolution from alumina powder, or volume increase that occurs from quicklime hydration.

In most cases, a replacement of the binder content of approximately 6-10% will give enough expansion to compensate for the shrinkage and attain neutral cement. An increase in dosage leads to further expansion and may result in severe damage to the mortar or concrete.

• Precast concrete
• Repair mortars
• Tile adhesives
• Flooring products
• Quick repair
• Anywhere where shrinkage can be an issue

• Shrinkage compensation
• High flexural strengths
• Increased setting times
• Increased strength development
• Rapid demolding

Setting times based on the following formulation:

• 125g Calumex® QX-P
• 250g CEM I 52.5R
• 0.56g Citric acid
• 150g water

Strength development based on the following formulation:

• 36g Calumex® QX-P
• 414g CEM I 52.5R
• 225g water
• 1350g NORM sand

Shrinkage results based on the following formulation:

• 36g Calumex® QX-P
• 414g CEM I 52.5R
• 225g water
• 1350g NORM sand

Note: Applying different types or sources of Portland cement can lead to varying results.