A. cracking and warg of bricks
B. loss of cohesion
C. enhancing the impermeability of bricks
D. none of the above
A. gypsum
B. calcium chloride
C. calcium carbonate
D. none of the above
1. better workability
2. better resistance to freezing and thawing
3. lesser workability
4. less resistance to freezing and thawing The correct answer is:
A. (1) and (2)
B. (1)and(4)
C. ((2)and (3)
D. (3)and (4)
A. less
B. more
C. equal
D. equal or more
A. coastal regions
B. plain regions
C. covering large areas
D. all of the above
A. equal to the size of a fully burnt brick
B. smaller than the size of a fully burnt brick
C. greater than the size of a fully burnt brick
D. none of the above
A. to increase the initial setting time of cement paste in concrete
B. to decrease the initial setting time of cement paste in concrete
C. to render the concrete more water tight
D. to improve the workability of concrete mix