​Perlite is one of the raw materials for lightweight plaster. How to choose the right perlite?

Perlite is one of the raw materials for lightweight plaster. How to choose the right perlite?

Choosing the right 话题标签#perlite can not only easily improve the Coating Coverage but also save material costs. For lightweight 话题标签#plaster, its water absorption rate should be low. If the perlite has a high water absorption rate, it can easily lead to post-thickening of the mortar, causing a series of problems. It also needs to have high strength，otherwise, the perlite is easily broken during mixing, ultimately reducing production capacity. The density of perlite directly affects the raw material cost because, in most cases, perlite is purchased by weight, while production costs are calculated by volume. So, what density of perlite is more suitable? Have you ever encountered the following problems:

Leading to hollow, cracked, or even detached plaster layers: Perlite absorbs a large amount of water from the mortar in plaster, disrupting the hydration reaction process of the plaster paste, leading to a decrease in the adhesion between the mortar and the substrate, thus causing hollowness, cracking, and in severe cases, the entire plaster layer may detach.
Reduced strength and durability of plaster: After absorbing water, perlite particles, which have relatively low strength, and their water-absorbing and swelling properties, will damage the internal structure and density of the plaster, resulting in insufficient strength and poor durability of the hardened plaster layer, making it prone to powdering and sandblasting.

Affects workability and material usage: Perlite reduces the water retention of the plaster slurry, making it prone to "water absorption" during construction, resulting in difficulties in operation. To ensure workability, additional water or cementitious materials are often required, which not only increases costs but may also further affect the final strength.

You need a high-strength, low-absorption perlite product. It also features a spherical structure, which enhances its ball effect.