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As a professional in various industries, I have come across the question of why lime is added to render mix. Lime has been used in construction for centuries, and its benefits are still relevant today. In this post, I will explain the importance of adding lime to render mix and how it can improve the quality and durability of your construction projects.
Firstly, lime acts as a binder in render mix, which means it helps to hold the mix together. This is important because it prevents the mix from cracking and breaking apart, which can compromise the structural integrity of the building. Lime also helps to reduce shrinkage, which can occur as the mix dries and hardens. This means that the render will maintain its shape and size, even as it ages.
Secondly, lime has a unique property that allows it to absorb carbon dioxide from the air. This process is known as carbonation, and it helps to strengthen the render mix over time. As the lime absorbs carbon dioxide, it forms calcium carbonate, which is a hard and durable material. This means that the render will become stronger and more resistant to weathering and erosion.
Thirdly, lime has a high pH level, which makes it resistant to fungal and bacterial growth. This is important because it prevents the growth of mold and mildew, which can cause health problems and damage to the building. Lime also helps to regulate moisture levels in the render mix, which can prevent dampness and water damage.
In conclusion, adding lime to render mix is essential for improving the quality and durability of your construction projects. It acts as a binder, reduces shrinkage, strengthens the mix over time, and prevents fungal and bacterial growth. By using lime in your render mix, you can ensure that your building will stand the test of time and remain in good condition for years to come.
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