Industrial Grade Calcium Hydroxide Hydrated Lime, 25kg Bag, Construction Grade

Hydrated Lime 25kg

The Industrial Grade Calcium Hydroxide Hydrated Lime is a high-purity slaked lime powder produced by hydrating quicklime under controlled conditions. This essential construction chemical serves as a primary plasticizer in masonry mortars and a stabilizing agent for soil modification. It provides the necessary alkalinity and binding properties required for high-performance finishes and structural foundations on industrial sites.

Built for the Job

Contractors use this slaked lime to modify the properties of cement-based mortars and renders. It significantly enhances the plasticity and workability of the mix, allowing masons to spread material more easily across brick or block surfaces. The inclusion of this additive increases the water retention of the mortar, which is essential when working with high-suction masonry units like clay bricks. In soil stabilization, the material reacts with clay minerals through a process called cation exchange. This chemical reaction breaks down the clay structure and improves the load-bearing capacity of the ground before paving or slab pouring. It also plays a vital role in water treatment for pH adjustment and the removal of impurities in industrial runoff. Site supervisors rely on this material for its consistent particle size and predictable chemical reactivity in large-scale batching. The carbonation process allows the material to slowly absorb carbon dioxide from the air, returning it to a limestone-like state which adds long-term durability to traditional lime washes.

• Preparation of Type S and Type N masonry mortars for brickwork.

• Soil modification to reduce plasticity and improve compaction.

• Industrial water treatment and pH regulation in drainage.

Product Highlights

High Chemical Purity

The powder maintains a high calcium hydroxide content to ensure maximum reactivity in chemical and construction applications.

Fine Particle Distribution

• Minimum 90% passing through a 75-micron (200 mesh) sieve
• Air-classified for consistent dispersion in dry and wet mixes

Mortar Performance

• Increases bond strength between masonry units
• Reduces the risk of shrinkage cracks during the curing phase

Technical Specifications

What’s Included

• 1 x 25kg Bag of Hydrated Lime (Calcium Hydroxide)

On-Site & Workshop Notes

• Store the bags in a dry, elevated area to prevent moisture absorption and premature carbonation.

• Always wear alkali-resistant gloves and eye protection as this material becomes caustic when mixed with water.

• For soil stabilization, ensure the powder is evenly tilled into the clay before adding water for compaction.

• Avoid contact with aluminum or galvanized surfaces to prevent corrosive reactions in wet conditions.