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Important Things You Need To Know About Lime Plaster
It is crucial for us to properly understand and take into account the essential facts about lime plaster when deciding which type of plastering material to use in our home improvement projects. Most of us fail to appreciate the importance and suitability of lime plaster primarily because of the wrong notions and misconceptions about lime. For one, a lot of us mistakenly associate lime with Portland cement. This is grossly erroneous as these are completely two different products. In some cases, people tend to make the mistake of classifying any mortar with lime content as lime plaster. In view of this confusion, it is crucial for us to study the product and distinguish the facts from the myths.
Lime plaster is generally defined as a mixture of calcium hydroxide and an aggregate. Lime is classified as a hydration product. Lime reacts with carbon dioxide to produce calcium carbonate. This is the solidified state of the lime mix. An ideal lime plaster is created with the combination of inert filler component such as sand and hydrated lime.
However, if cement is added to the lime plaster mix, the physical as well as the chemical processes are drastically altered. Specifically, the presence of cement in the lime plaster mix will have a direct effect on the porosity, elasticity, colour and final appearance of the plasterwork. In most cases, plasterers carefully manage the proportion of cement in their lime plaster mix in order to reduce its effects on the final lime plaster mix.
Lime plaster is a flexible and functional plastering material. This plastering mix is highly preferred for frescoes. The desired colouring and surface finished is attained with the use of water soluble pigmentation elements. This colouring material is simply applied on the surface that has just been applied with plaster mix.
There are quite of a number of reasons why you have to favor lime plaster over the other types of plastering materials. Under present conditions, the benefits that we can gain from using lime plaster are varied. These upsides are enough justifications for most of us to use lime plaster instead of the other plastering materials.
Lime directly helps in the reduction of the amount of carbon dioxide that is released into the atmosphere. Scientific studies have shown that lime can account to as much as 80% of the total reduction of the carbon dioxide emission in the atmosphere. This means that if you are going to lime as your plastering material for an average-sized home unit, you can potentially prevent the release into the atmosphere an estimated 10,000 lbs of CO2.
Lime plaster has better elasticity than the other types of plastering material. Plasterers prefer to use lime as plastering material as it can be easily managed and worked on. Lime plaster has longer setting time compared to other plastering mix. Thus, you can easily adjust and correct your plasterwork before it finally sets. This distinct feature of lime plaster is very crucial as the setting and hardening process is irreversible and you will not be able to correct and work on the plaster once the process is complete.
Since this type of plastering material does not set as quickly as the other plastering materials, you can easily correct and manage the final coat for any changes as a result of movements in your structure. While the lime plaster carbonates, cracks are automatically eliminated as water is drawn from the atmosphere by the lime plaster.
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