what is the melting point of concrete and or cement?
- PalomoXPLv 41 decade agoFavorite Answer
The concrete does not have point melting. When the temperature is high (more than 1000°C) the concrete one crumbles like the sugar. Their components have different behavior. Stone and sand melts to 2600°C, the steel melt to 2500°. The same happens to the components of the cement.
- 4 years ago
Concrete does have a fusion point. It only spalls due to temperature is raised rapidly and the water moisture turns to steam and cannot exit the concrete fast enough resulting in explosive spalling. This is old news. The Portland cement, sand and gravel all have fusion points. I think it could be used in areas up to 1000 deg F or a little more provided that the concrete is cured, up to 80% (about 30 days). A drying schedule should be the concrete be dried below boiling point for several hours, then increased 5 degrees per hour and hold 3-5 hours at 300, then raide 5 degrees per hour and hold again for 2-4 hours at 600 deg F, then increased 5 deg per hour to desired max temp, around 1200 deg F and hold and check for cracking and spalling, then put concrete into service.
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- Anonymous1 decade ago
It really depends on the components of concrete/cement.
Here's just an example.
Residual strength of hybrid-fiber-reinforced high-strength concrete after exposure to high temperatures:
Residual strengths of high-strength concrete (HSC) and hybrid-fiber-reinforced high-strength concrete (HFRHSC) after exposure to high temperatures were investigated.
The results showed that normal HSC is prone to spalling after exposure to high temperatures, and its first spalling occurs when the temperature approaches 400 °C.
For HSC reinforced by high melting point fibers, the first spalling occurs when the temperature reaches to approximately 800 °C, while there is no spalling during exposing to high temperatures for HSC reinforced by polypropylene (PP) fiber with a low melting point.
Mixing high melting point fiber (i.e., carbon or steel fiber) with low melting point fiber (i.e., PP fiber) HSC greatly improves the properties of HSC after exposure to high temperatures.
- 4 years ago
concrete can't melt.