Introduction:
Construction work in waterlogged areas poses unique challenges as the presence of water can affect the quality and durability of the mortar used. Therefore, it is crucial to select a suitable mortar that can withstand the adverse conditions and maintain its strength over time. Among the various types of mortar available, three options stand out as potential candidates for construction work in waterlogged areas: cement mortar, lime mortar, and epoxy mortar.

Cement Mortar:
Cement mortar is the most commonly used type of mortar in construction due to its high strength and durability. It consists of cement, sand, and water. However, cement mortar may not be the most suitable choice for waterlogged areas due to the following reasons:

1. Setting Time: Cement mortar has a relatively fast setting time, which may not allow sufficient time for proper curing in waterlogged conditions.

2. Water Absorption: Cement mortar is prone to absorbing water, leading to an increased risk of deterioration and loss of strength over time.

3. Cracking: The presence of water can cause cement mortar to crack, leading to reduced structural integrity and potential water seepage.

Lime Mortar:
Lime mortar, made from lime, sand, and water, offers certain advantages over cement mortar in waterlogged areas:

1. Flexibility: Lime mortar is more flexible and allows for better movement and expansion, reducing the risk of cracking.

2. Breathability: Lime mortar allows for better moisture evaporation, preventing the buildup of water and reducing the risk of deterioration.

3. Self-Healing: Lime mortar has the ability to self-heal hairline cracks, ensuring the continued integrity of the mortar.

Epoxy Mortar:
Epoxy mortar is a specialized type of mortar that contains epoxy resins, sand, and hardeners. It offers unique properties that make it suitable for waterlogged areas:

1. Water Resistance: Epoxy mortar is highly resistant to water and can maintain its strength even in prolonged exposure to water.

2. Chemical Resistance: Epoxy mortar is resistant to various chemicals, making it suitable for areas with high chemical exposure.

3. Adhesion: Epoxy mortar has excellent adhesion properties, ensuring strong bonding with substrates and reducing the risk of debonding.

Conclusion:
While cement mortar is commonly used in construction, it may not be the most suitable option for waterlogged areas due to its fast setting time and water absorption. Lime mortar offers better flexibility and breathability, making it a viable choice for such conditions. However, epoxy mortar stands out as the most suitable option for construction work in waterlogged areas, thanks to its exceptional water resistance, chemical resistance, and adhesion properties. It provides a durable and long-lasting solution that can withstand the challenges posed by waterlogged conditions.