Which of the following sentences is INCORRECT in the case of mortar? Mark as favorite Copy Link Even a small percentage of mica, if present, considerably lower the tensile strength and adversely affects the compressive strength It requires about twice as much cement to produce mortar of a given strength when fine sand is used as it does with coarse sand Cement lime mortars are helpful in autogenously healing of cracks. There is a gain of compressive strength by the replacement of less than 25% of cement by hydrated lime Check Answer