Hydrated lime

Hydrated lime is calcium hydroxide a type of dry powder made from limestone. It is created by adding water to quicklime in order to turn oxides into hydroxides.

Hydrated Lime Uses:

Used in various industrial applications such as

Water treatment
In water treatment, hydrated lime is primarily used to adjust the PH level of water by raising its alkalinity, making it a key component for softening hard water by precipitating calcium and magnesium ions.

Key Functions in water treatment

PH Adjustment
The most prominent role of hydrated lime is to increase the PH of water, neutralizing acidity and preventing corrosion in pipes by raising the alkalinity level

Water Softening
By adding hydrated lime, calcium and magnesium ions precipitate out, effectively softening the water.

Coagulation Aid
Lime can be used in conjunction with other coagulants like alum to enhance the settling of suspended particles by optimizing PH conditions for flocculation.

Impurity Removal
Depending on the type of lime used (e.g., dolomitic lime) it can also help remove silica and other impurities from water.

Construction
In construction, hydrated lime is primarily used for soil stabilization by improving the strength and stability of weak soils, particularly in road bases, building foundations, and earthen dams: it is commonly added to mortars and plasters to enhance workability, adhesion, and flexibility, making it a key component in masonry construction: additionally, hydrated lime can be incorporated into concrete mixes to improve its durability and water resistance, especially in harsh environments.

Other Uses of Hydrated Lime

Soil Stabilization
Treating expansive or poorly compacted soils to increase their load-bearing capacity and reduce settlement.

Mortar and Plaster
Adding to mortar and plaster mixes to improve workability, adhesion, and flexibility, leading to better bonding between bricks and blocks.

Concrete Production
Used in small amounts to enhance concrete’s density, water resistance and workability.

Historic Building Restoration
Due to its compatibility with older lime based materials, hydrated lime is often used in restoration projects on historic structures.

Benefits Of Using Hydrated Lime In Construction

Improved Workability
Makes mortar and plaster easier to apply and shape.

Increased Flexibility
Helps prevent cracking in mortar joints due to its ability to slightly deform with movement

Breathability
Allows moisture to escape from a structure, preventing potential damage from trapped water vapor.

Environmental Benefits
Considered a more environmentally friendly option compared to some other construction materials.

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