Find the wrong statement.In Le Chatelier's apparatus wea)estimate ex...
In Cement Mortar and Cement Concrete, the volume expands due to the unburnt lime (CaO) and Magnesia (MgO).
Le Chatelier Apparatus test is used to determine the presence of unburnt lime (CaO).
The cracks developed in the structure are mostly due to the unburnt lime because it increases the volume of the cement.
Lime and magnesia also react with water, and thus increase in volume occurs in the cement,
which is also a reason for cracks in the structures.
Hence, the correct option is (c).
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Find the wrong statement.In Le Chatelier's apparatus wea)estimate ex...
Le Chatelier's Apparatus: Wrong Statement
Le Chatelier's apparatus is a device used to determine the expansion potential of cement. It helps us to understand the behavior of cement when exposed to different conditions. However, there is one wrong statement among the given options. Let's find out which one it is.
Estimating Expansion Potential of Cement
The primary purpose of Le Chatelier's apparatus is to estimate the expansion potential of cement. This device measures the change in length of a cement specimen when exposed to water or steam. By measuring the amount of expansion, we can determine the quality of the cement.
Estimating Presence of Magnesia in Cement
Magnesia is a component of cement that affects its properties. It is necessary to know the amount of magnesia in cement to ensure its quality. However, Le Chatelier's apparatus is not used to estimate the presence of magnesia in cement.
Adopting 0.78 Times the Standard Consistency of Water
The water consistency test is used to determine the amount of water required to prepare the cement paste. The standard consistency of water is determined by the amount of water required to produce a cement paste with a specific consistency. Le Chatelier's apparatus adopts 0.78 times the standard consistency of water to prepare the cement paste.
Estimating Presence of Unburnt Lime in Cement
Unburnt lime is a common problem in cement production. It affects the strength and durability of the cement. Le Chatelier's apparatus is not used to estimate the presence of unburnt lime in cement.
Conclusion
Le Chatelier's apparatus is primarily used to estimate the expansion potential of cement. It is also used to adopt 0.78 times the standard consistency of water to prepare the cement paste. However, it is not used to estimate the presence of magnesia or unburnt lime in cement. Therefore, option 'C' is the wrong statement.