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what is additives or admixtures for preparing mortar ?
Additives or admixtures for mortar are substances that are added to the mortar mix to enhance its properties or performance. These additives can modify the workability, strength, durability, bonding, setting time, and other characteristics of the mortar. Here are some common additives or admixtures used in mortar:
1. Plasticizers: Plasticizers, also known as water reducers, are additives that improve the workability and flow of the mortar mix. They allow for easier handling and application of the mortar while maintaining its desired consistency. Plasticizers can reduce the water content required for a given workability, resulting in stronger and more durable mortar.
2. Retarders: Retarders are additives that slow down the setting time of the mortar. They are useful in hot weather conditions or when working with large areas to prevent the mortar from drying out too quickly. Retarders help extend the workable time of the mortar, allowing for proper application and finishing.
3. Accelerators: Accelerators, as the name suggests, speed up the setting and curing time of the mortar. They are typically used in cold weather conditions or when a quick turnaround time is required. Accelerators can help the mortar gain strength faster, allowing for faster construction or repair work.
4. Bonding Agents: Bonding agents are additives that enhance the adhesion of the mortar to the substrate. They improve the bond strength between the mortar and the surface, ensuring better long-term durability. Bonding agents are commonly used when applying mortar to difficult or non-porous surfaces or when repairing existing mortar.
5. Air-Entraining Agents: Air-entraining agents create small air bubbles in the mortar mix, which improves its freeze-thaw resistance. These agents increase the durability of the mortar by allowing it to expand and contract without cracking when subjected to temperature variations.
6. Waterproofing Agents: Waterproofing agents are used to improve the water resistance of the mortar. They help reduce water penetration and enhance the durability of the mortar in damp or wet environments.
It's important to note that the specific additives or admixtures used in mortar can vary depending on the desired properties, application requirements, and regional practices. These mortar will be coated by foam coating machine.Always refer to the manufacturer's instructions and guidelines for the recommended additives and their correct dosage for the specific type of mortar being used.
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