Early strength given by c3s bouge compound in cement during hydration process and ultimate strength is given by c2s bouge compound

The compound responsible for early strength development in cement is tricalcium silicate (C3S).

Explanation:
Tricalcium silicate, also known as alite, is one of the main compounds present in cement. It is formed from the reaction of calcium oxide (lime) and silica in the kiln during the manufacturing process of cement. Tricalcium silicate is the most abundant compound in cement, typically comprising 50-70% by weight.

Here is a detailed explanation of why tricalcium silicate is responsible for early strength development in cement:

1. Hydration Process:
When water is added to cement, a chemical reaction called hydration occurs. During hydration, water reacts with the compounds in cement to form various hydration products, including calcium silicate hydrate (C-S-H) gel.

2. Rapid Reaction:
Tricalcium silicate has a higher reactivity compared to other compounds present in cement. It reacts rapidly with water to form calcium silicate hydrate gel and calcium hydroxide (CH). This rapid reaction contributes to the early strength development of cement.

3. Formation of C-S-H Gel:
The hydration of tricalcium silicate produces a significant amount of C-S-H gel. The C-S-H gel is responsible for the strength and durability of cementitious materials. It forms a network of interlocking crystals that provide the hardened cement matrix with strength.

4. Calcium Hydroxide:
In addition to the C-S-H gel, tricalcium silicate also produces calcium hydroxide as a byproduct of hydration. Calcium hydroxide contributes to the early strength development of cement by forming crystalline structures that enhance the strength of the cement paste.

5. Heat Generation:
The hydration of tricalcium silicate is an exothermic process, meaning it releases heat. This heat generation contributes to the early strength development of cement by accelerating the hydration reactions and promoting the formation of hydration products.

In summary, tricalcium silicate (C3S) is the compound responsible for the early strength development of cement. Its high reactivity, rapid reaction with water, and formation of calcium silicate hydrate gel play key roles in the early strength development of cementitious materials.