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Difference between Gypsum and Lime

Difference between Gypsum and Lime

There are many different types of plaster including gypsum and lime. Gypsum is a softer plaster that is mainly used for interior work, while lime is a harder plaster that can be used both indoors and outdoors. There are also many differences between the two plasters, which this blog post will explore in more detail. So, if you’re wondering what the difference between gypsum and lime plaster is, keep reading!

What is Gypsum?

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate. It is widely mined and is used as a fertilizer, and as the main constituent in many forms of plaster, blackboard chalk, and wallboard. Gypsum deposits are found in sedimentary basins worldwide. They are processed to make a variety of products that are used in the building and construction industries. Gypsum is a common mineral with many uses, most of which involve its unique properties as a building material. Gypsum’s popularity as a construction material has been largely strength and fire resistance. Gypsum is also effective in controlling the rate of water absorption to give plaster an extended working time. When mixed with fibrous materials, gypsum forms a lightweight, strong, moldable composite that has many industrial applications. Gypsum has been used as a fertilizer for centuries. It is still an important agricultural product, which provides essential nutrients for plant growth. Gypsum is also increasingly being used as a source of environmental calcium to help counteract acidity levels in agricultural soils caused by intensive farming practices.

What is Lime?

Lime is a calcium-containing inorganic material in which carbonates, oxides, and hydroxides predominate. In the strict sense of the term, lime is calcium oxide or calcium hydroxide. It is also the name of the natural mineral (native lime) CaO which occurs as a product of coal seam fires and in altered limestone xenoliths in volcanic ejecta. The word “lime” originates with its earliest use as building mortar and has the sense of sticking or adhering. These materials are still used in large quantities as building lime or mortar in the form of plaster, putty, tiles, and other fillers. Lime industries and the use of many of the resulting products date from prehistoric times in both the Old World and the New World. Lime saokḗs were formerly used for whitewashing (calcium oxide) but shelled limestones became more popular in this respect from Medieval times onwards (calcium carbonate). Lime is an important industrial chemical. It is widely used as a flocculant, coagulant, and sludge conditioner in water and wastewater treatment, one of its main uses being to remove phosphates from municipal wastewater.

Difference between Gypsum and Lime

Gypsum and lime are both minerals that can be used to improve the quality of the soil. Gypsum is calcium sulfate, while lime is calcium carbonate. Gypsum is more effective at improving the structure of clay soils, while lime is better at raising the pH of acidic soils. Gypsum can also help to reduce the toxicity of heavy metals in the soil, while lime can improve the drainage of poorly drained soils. In general, gypsum is more expensive than lime and is not as widely available. Lime is also more corrosive than gypsum, so it should be handled with care. When used properly, both Gypsum and Lime can be beneficial additions to the garden.


Gypsum and lime are both used in construction, but they have different purposes. Gypsum is used as a bonding agent, while lime is used to increase the strength of concrete. It’s important to understand the difference between these two materials so that you can choose the right one for your project.

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