| Quantity: | |
|---|---|
Parameter | Description |
Chemical Name | Calcium Hydroxide |
Formula | Ca(OH)₂ |
Molecular Weight | 74.0927 g/mol |
Synonyms | Slaked Lime, Hydrate Lime |
CAS Number | 1305-62-0 |
Appearance | White Powder |
Density | 2.24 g/cm³ (at 25°C) |
Melting Point | 580°C (decomposes into calcium oxide and water) |
Solubility | Slightly soluble in water (1.65 g/L at 20°C), solubility decreases with increasing temperature |
Specific Surface Area | Indicates the surface area per unit mass or volume, affects reactivity and solubility |
Particle Size Distribution | Describes the range and distribution of particle sizes, affects uniformity and stability |
Specific Surface Area Distribution | Distribution of surface area across different particle size ranges, affects reaction efficiency and adsorption capacity |
Crystal Structure | Describes the crystalline morphology and structural characteristics, influences properties and applications |
Hardening Performance | Excellent hardening properties, contributing to high strength in construction materials |
Thermal Insulation | Provides better thermal insulation performance compared to traditional wall materials |
Fire Resistance | Offers good fire resistance, reducing the risk of fire spread |
Adhesion Strength | Forms strong bonds when mixed with sand in mortar, ensuring bricks are securely bonded |
Environmental Impact | Eco-friendly, safe for use in construction, and supports green building trends |
Applications | Used as wall materials, fireproof coatings, waterproof coatings, adhesives, and in waste utilization |
Applications in Construction
1. Enhancing Concrete Strength and Durability
Integration with Concrete: The addition of calcium hydroxide to concrete mixes enhances its strength and durability.
Reaction with CO2: When calcium hydroxide in concrete reacts with carbon dioxide in the air, it forms calcium carbonate, which strengthens the concrete structure.
2. Soil Stabilization and Acid Neutralization
Improving Soil pH: Calcium hydroxide is used to neutralize acidic soils, raising their pH levels and improving soil structure and fertility.
Stabilizing Foundations: By treating the soil, it enhances the stability of foundations and reduces the risk of settlement and deformation.
3. Use in Mortars and Plasters
Binding Agent: Calcium hydroxide acts as a binding agent in mortars and plasters, improving adhesion and durability.
Traditional Construction Practices: It has been used historically in traditional building practices, such as lime-based mortars, which provide breathability and flexibility to walls.
4. Air Purification and Humidity Control
Absorbing Harmful Gases: Calcium hydroxide can absorb harmful gases like carbon dioxide and formaldehyde, improving indoor air quality.
Humidity Regulation: Its hygroscopic properties help regulate humidity levels, preventing mold growth and maintaining a healthy indoor environment.
5. Fire Resistance
Water Absorption: Calcium hydroxide’s ability to absorb water can help slow down the spread of fire by reducing the available fuel (moisture).
Heat Generation: During decomposition, it releases heat, which can affect fire behavior, although this aspect should be carefully managed to avoid exacerbating fire conditions.
6. Historical Preservation and Restoration
Traditional Building Materials: Calcium hydroxide-based mortars and plasters are favored in historical restoration projects due to their compatibility with traditional building materials.
Preservation of Heritage Structures: Its use helps maintain the authenticity and integrity of heritage structures.
Benefits in Construction
Durability: Structures incorporating calcium hydroxide tend to be more durable and resistant to weathering.
Environmental Compatibility: As a naturally occurring inorganic compound, calcium hydroxide offers a more environmentally friendly alternative to some synthetic building materials.
Versatility: Its versatility allows for a wide range of applications, from structural reinforcement to aesthetic finishes.
