Bulk refractories are also known as amorphous refractories.

Bulk refractories (amorphous refractories): Amorphous refractories are refractories that are directly used without forming and firing composed of granular and powdery materials and binders of reasonable gradation. Generally, the granular material that constitutes this material is called aggregate, the powder material is called admixture, and the binder is called cementing agent. This type of material has no fixed shape and can be made into paste, mud and loose form, so it is also commonly known as bulk refractory. This refractory material can be used to form a jointless integral structure, so it is also called an integral refractory material.

The basic composition of amorphous refractories is granular and powdery refractories. According to its use requirements, it can be made of various materials. In order to make these refractory materials combined as a whole, except for rare special cases, appropriate varieties and quantities of binders are generally added. In order to improve its plasticity or reduce water consumption, a small amount of appropriate plasticizer and superplasticizer can be added, and a small amount of appropriate other admixtures can also be added to meet other special requirements.