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The two main compounds imparting strength for Ordinary Portland Cement are:
- a)Tricalcium silicate and dicalcium silicate
- b)Dicalcium silicate and aluminates
- c)Tricalcium aluminates and silicate
- d)Tricalcium silicate and tricalcium aluminates
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The two main compounds imparting strength for Ordinary Portland Cement...
C3S and C2S together constitute about 70% of cement and are responsible for providing most of the strength to it C3A is responsible for flash set and C4AF generates very less strength.
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The two main compounds imparting strength for Ordinary Portland Cement...
Explanation:
1. Ordinary Portland Cement:
Ordinary Portland Cement (OPC) is the most commonly used type of cement in construction. It is composed of various compounds that contribute to its strength and durability.
2. Compounds in Ordinary Portland Cement:
The main compounds present in Ordinary Portland Cement are:
- Tricalcium Silicate (C3S): Tricalcium silicate is the most abundant compound in OPC, comprising approximately 50-70% of its composition. It is responsible for the early strength development and contributes to the long-term strength of the cement.
- Dicalcium Silicate (C2S): Dicalcium silicate is the second most abundant compound in OPC, making up about 15-30% of its composition. It contributes to the strength development of the cement over a longer period of time compared to tricalcium silicate.
- Tricalcium Aluminate (C3A): Tricalcium aluminate accounts for about 5-10% of the composition of OPC. It reacts with water to form various hydrated compounds that contribute to the early strength development of the cement.
- Tetracalcium Aluminoferrite (C4AF): Tetracalcium aluminoferrite is present in smaller quantities (about 5-15%) in OPC. It contributes to the color of cement and has limited impact on its strength.
3. Strength Imparting Compounds:
The compounds that primarily impart strength to Ordinary Portland Cement are:
- Tricalcium Silicate (C3S): Tricalcium silicate is responsible for the initial strength development of OPC. It reacts with water to form calcium silicate hydrate (C-S-H) gel, which contributes to the formation of the cementitious matrix and provides strength to the cement.
- Dicalcium Silicate (C2S): Dicalcium silicate contributes to the long-term strength development of OPC. It reacts with water at a slower rate compared to tricalcium silicate, providing strength to the cement over a longer period of time.
Therefore, the correct answer is option 'A' - Tricalcium silicate and dicalcium silicate. These two compounds play a significant role in imparting strength to Ordinary Portland Cement.
1. Ordinary Portland Cement:
Ordinary Portland Cement (OPC) is the most commonly used type of cement in construction. It is composed of various compounds that contribute to its strength and durability.
2. Compounds in Ordinary Portland Cement:
The main compounds present in Ordinary Portland Cement are:
- Tricalcium Silicate (C3S): Tricalcium silicate is the most abundant compound in OPC, comprising approximately 50-70% of its composition. It is responsible for the early strength development and contributes to the long-term strength of the cement.
- Dicalcium Silicate (C2S): Dicalcium silicate is the second most abundant compound in OPC, making up about 15-30% of its composition. It contributes to the strength development of the cement over a longer period of time compared to tricalcium silicate.
- Tricalcium Aluminate (C3A): Tricalcium aluminate accounts for about 5-10% of the composition of OPC. It reacts with water to form various hydrated compounds that contribute to the early strength development of the cement.
- Tetracalcium Aluminoferrite (C4AF): Tetracalcium aluminoferrite is present in smaller quantities (about 5-15%) in OPC. It contributes to the color of cement and has limited impact on its strength.
3. Strength Imparting Compounds:
The compounds that primarily impart strength to Ordinary Portland Cement are:
- Tricalcium Silicate (C3S): Tricalcium silicate is responsible for the initial strength development of OPC. It reacts with water to form calcium silicate hydrate (C-S-H) gel, which contributes to the formation of the cementitious matrix and provides strength to the cement.
- Dicalcium Silicate (C2S): Dicalcium silicate contributes to the long-term strength development of OPC. It reacts with water at a slower rate compared to tricalcium silicate, providing strength to the cement over a longer period of time.
Therefore, the correct answer is option 'A' - Tricalcium silicate and dicalcium silicate. These two compounds play a significant role in imparting strength to Ordinary Portland Cement.
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