How long is the shelf life of monolithic castable refractory?

The shelf life of monolithic castable refractory varies according to different varieties, production processes, quality, and other factors. Generally speaking, the shelf life of refractory castables can range from a few months to a few years, but the shelf life of refractory castables is affected to a certain extent by storage conditions. Refractory castables with good storage conditions have a relatively long shelf life.

Shelf life of common monolithic castable refractory

High-alumina castable: Usually the shelf life is about 6 months to 1 year.
Alumina silicate castable: The shelf life is about half a year to one year.
Neutral castable: Usually the shelf life is about 6 months to 1 year.
Lightweight castable: The shelf life is usually shorter, generally 3-6 months.

What factors are related to the shelf life of monolithic refractory castables?

Types of castables

Different types of refractory castables have different compositions and structures. Low-cement, cement-free or ultra-low-cement castables have lower chemical compositions and moisture content, and have a relatively long shelf life, usually 12 months. Traditional refractory castables, especially those with higher cement content, have a shorter shelf life, usually 6 months, due to their moisture content and cement hydration reaction.

Storage conditions of high-temperature resistant castables

Refractory castables have high requirements for storage conditions, especially avoiding moisture and high temperatures. If castables are exposed to a humid environment for a long time, they are prone to moisture absorption and deterioration, leading to hardening or agglomeration, which affects their fluidity and strength. The ideal storage environment should be a dry, cool, well-ventilated warehouse, and direct contact with the ground should be avoided to prevent moisture from rising.

Packaging integrity

Refractory castables are usually packaged in paper bags or plastic woven bags. If the packaging bag is damaged or not used for a long time after opening, the castable very easily absorbs moisture and affects its performance. Therefore, when not in use, be sure to keep the packaging intact, and try to use it up as soon as possible after opening.