Lime cement, also known as hydraulic lime, is a type of cement that has been used for centuries in construction. It is made by burning limestone or chalk at a high temperature and then grinding it into a fine powder. Lime cement has been used in various applications, including mortar, plaster, and concrete. However, the question remains: is lime cement strong enough for modern construction?
To answer this question, we need to understand the properties of lime cement. Unlike Portland cement, which hardens through a chemical reaction with water, lime cement hardens through a process called carbonation. This means that it absorbs carbon dioxide from the air and forms calcium carbonate, which gives it its strength. Lime cement also has a lower compressive strength than Portland cement, but it has a higher flexibility and is more resistant to cracking.
In terms of strength, lime cement can be strong enough for certain applications. It is commonly used in historic restoration projects, where the goal is to match the original materials and techniques. Lime cement is also used in sustainable construction, as it has a lower carbon footprint than Portland cement. However, for high-stress applications, such as bridges or high-rise buildings, Portland cement is still the preferred choice.
Another factor to consider is the quality of the lime cement. Lime cement can vary in strength depending on the source of the limestone or chalk, the burning temperature, and the grinding process. It is important to use high-quality lime cement and to follow the manufacturer's instructions for mixing and application.
In conclusion, lime cement can be strong enough for certain applications, but it is not as strong as Portland cement. Its strength and durability depend on the quality of the material and the application. When considering the use of lime cement in construction, it is important to weigh the benefits and limitations and to consult with a professional.