Behavior of steel and concrete in fire: The power of thorough research

Introduction: The hidden dangers of heat

Imagine, an inferno roaring its way through the heart of a construction. The consequences? Often devastating. But what happens on a microscopic level to the materials that form the skeleton of our buildings? At Bjond Innovation, we penetrate to the core of this question. We determine how we can thoroughly investigate the strength and stiffness of steel and concrete after a fire, something that is often overlooked, but is essential for structural safety.

The impact of heat on steel: What do we need to know?

The behavior of steel in fire is a complex playing field of temperature-dependent properties. In a fire with temperatures well exceeding 400℃, steel sees a significant reduction in yield strength, while the stiffness, represented by the E-modulus, already begins to decrease at temperatures above 100℃. These are not minor changes in material properties – they call for a perceptive analysis.

What really counts is identifying the 'worst case' scenarios where the most prolonged heat stress has occurred. At Bjond Innovation, we approach this with a methodology of meticulous research, taking samples to quantify the tensile properties. If the results fall within the standard tolerances, we breathe a sigh of relief - no further investigation needed. But if the properties deviate, then it's time for a more in-depth look.

Concrete under fire: A complex battle

With concrete, the story is similar, but with its own set of challenges. Between 300℃ and 500℃, concrete can lose up to half of its original strength, a troubling thought. The hydrated cement products start to disintegrate, while moisture forces its way out, putting pressure on the material from the inside.

If you increase the temperature, there will be a loss of strength that cannot be resisted. Microcracks appear and expand, the concrete becomes porous, brittle, and it almost completely loses its load-bearing capacity. At temperatures above 800℃, concrete is practically unable to bear any mechanical load.

The advice of Bjond Innovation? A thorough inspection of both the concrete and the steel anchored in it. A tapping test can already reveal a lot, while core samples give us further insight into the compressive strength and the internal condition of the material.

Beyond Innovation: Where expertise in fire safety meets

At Bjond Innovation, we understand the seriousness of the search for answers regarding the behavior of steel and concrete in fire. Our services all have the objective of providing our clients with independent advice that is supported by solid science.

We are not just consultants; we are pioneers leading the way in the fight against invisible dangers that can lurk in a building's structure after a blaze. Our innovative approaches and rigorous testing protocol ensure that when we say a building is safe, you can rely on that with confidence.

Conclusion: Safety begins with knowledge

The behavior of steel and concrete during fire remains an area with many uncertainties. However, with a partner like Bjond Innovation by your side, you can be sure that the integrity of your structure is expertly evaluated. Whether it's about preventive advice or post-fire analysis, our goal always remains the same: to ensure safety through knowledge. Because let's face it, is there anything more important than the certainty that our foundation, both literally and figuratively, is solid?

Our doors are open to industry, construction companies, and government services that strive for excellence. Together we bring safety, innovation, and architectural expertise to a higher level. Are you ready to take on the challenge with us?