Why doesn't ceramsite swell?

That's a lot of money. Let me talk about it.

The expansion of ceramsite needs two conditions to happen at the same time.

1, there should be liquid phase; That is to say, the granular materials form a semi-molten softened body with appropriate softening viscosity and surface tension at the expansion temperature.

2. At the same time, enough gas should be generated.

So what factors have changed these two conditions? I can chat for half a day. (Don't brag) Give it to me. Leave QQ and we can chat. By the way, which ceramsite factory are you from? That's what I did.