Why Does Concrete Harden?

The cement hardens when it comes into contact with water. This hardening is a process of crystallization. Crystals form (after a certain length of time which is known as the initial set time) and interlock with each other. Concrete is completely fluid before the cement sets, then progressively hardens.

Why Does Concrete Harden?

Concrete is a material used in construction for centuries, and one of its most appealing characteristics is its ability to harden. This hardening process is known as curing, and it is essential for ensuring a concrete structure is strong and durable. But how does concrete harden? And why?

The hardening process of concrete begins with the addition of water. A chemical reaction produces heat when water is combined with the cement powder. This heat is what allows the cement to form a paste, and it is what allows the concrete to harden.

The cement paste comprises a combination of minerals, such as calcium, silica, and alumina, that are mixed with water and then allowed to react. This reaction, called hydration, produces a gel-like paste that binds the mineral particles together. As this paste hardens, it forms a network of crystals, which are held together by strong chemical bonds. This network of crystals gives concrete its strength and durability.

The amount of time it takes for concrete to harden depends on the temperature and humidity of the area in which it is being poured. Warmer temperatures and higher humidity levels will accelerate the hardening process, while colder temperatures and lower humidity levels

Related Posts

Leave a comment