Correct Answer:
Option C - Sea sand – As it obtained from sea it contain salt, which is used in attracting moisture from atmosphere.
• Such absorption causes dampness and disintegration of work.
• It is generally not used for engineering purpose due to its retard setting action of cement.
C. Sea sand – As it obtained from sea it contain salt, which is used in attracting moisture from atmosphere.
• Such absorption causes dampness and disintegration of work.
• It is generally not used for engineering purpose due to its retard setting action of cement.