Lime is everywhere in our home improvement process. Lime is divided into slaked lime and quicklime. A friend asks Xiaobian. Is hydrated lime and quicklime the same? What are the differences between them? What is Xiaobian sharing for everyone today? the difference between hydrated lime and quicklime and hydrated lime and quicklime which is good.
The difference between slaked lime and quick lime
1. The main component of quicklime is calcium oxide, the appearance of a white solid, fire-resistant calcined lime, insoluble, quicklime has water absorption, can be used to make desiccant.
2. Lime in the process of reaction with water will produce calcium hydroxide, people call him the aging or digestion of lime, the reaction product of calcium hydroxide, also known as hydrated lime or hydrated lime.
3. When lime matures, it will release a lot of heat, making the volume increase by 1-2 times, calcining well, the lime with high calcium oxide content is ripened faster, and the heat release and volume increase are also more, generally used on the construction site There are two methods for curing lime: the lime-removing method and the lime-removing method. After the mature lime is cooked, it will form a lime slurry. The lime particles will form a colloidal structure of calcium hydroxide. The surface will absorb a thick layer of water film. The water film can absorb a large amount of water, so it has a strong ability to maintain moisture. In order to ensure good water quality, the slaked lime is mixed into the cement mortar to form a mixed mortar, which can obviously increase the viscosity of the mortar.
4. The quicklime hardens depending on the dry crystallization and the effect of carbonization. Because of the low carbon dioxide content in the air, the calcium carbonate hard shell formed after carbonization can prevent the infiltration of carbon dioxide into the interior and also prevent the water from evaporating outward, resulting in slow hardening. The strength after hardening is also not high, generally only 1:2 lime mortar and 28 d compressive strength of only 0.2 ~ 0.5 MPa.
5. In moist environments, moisture in slaked lime does not evaporate, carbon dioxide cannot penetrate, hardening stops, and calcium hydroxide is slightly soluble in water. Hardened lime will also dissolve in water. So slaked lime is not suitable for use in long-term wet and easy water immersed environments.
6. In the hardening process of hydrated lime, it is necessary to evaporate a large amount of water, cause obvious shrinkage of the volume, and prone to dry shrinkage cracks. Therefore, hydrated lime is not suitable for individual use, and generally it is necessary to incorporate some sand, paper, and hemp Other materials reduce shrinkage, increase tensile strength, and save lime.
7. Quicklime has strong alkalinity, and generally reacts with glassy active silica at room temperature. Therefore, quicklime is one of the more important raw materials in the construction materials industry.
Xiaobian Summary: The above is small series for everyone to share slaked lime and quicklime and hydrated lime and quicklime difference which is good, quicklime and hydrated lime have a more important role, I hope to share that can help you. For more information Please continue to pay attention to the website of this website.
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