Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below: A. Both A and R is true and R is correct explanation of A B. Both A and R is true and R is not a correct explanation of A C. A is true but R is false D. A is false but R is true

The correct answer is: A. Both A and R is true and R is correct explanation of A.

Pure lime is a type of cement that is made from limestone. It is a slow-setting cement, which means that it takes a long time to harden. This is because pure lime does not contain any quick-setting agents, such as gypsum. The slow setting of pure lime can be a disadvantage, as it can lead to delays in construction projects. However, it also has some advantages, such as the fact that it is less likely to crack than other types of cement.

The reason for the slow setting of pure lime is that it is a pozzolanic material. Pozzolanic materials are materials that react with water to form cementitious compounds. The pozzolanic reaction is a slow process, which is why pure lime takes a long time to harden.

The reason statement (R) is a correct explanation of the assertion statement (A) because it provides a scientific explanation for why pure lime takes a long time to develop adequate strength.