Concrete Technology

Step 1: Understand bleeding in concrete.
Bleeding is the phenomenon where excess water rises to the surface of freshly placed concrete.
Step 2: Examine each statement.
(A) Lean mixes have less cement and more water, hence bleeding is more — correct.
(B) Addition of pozzolanic or finer materials reduces bleeding by filling voids — correct.
(C) Calcium chloride accelerates setting and can increase bleeding — correct.
Step 3: Identify the incorrect statement.
Since all the given statements (A), (B), and (C) are correct, none of them is incorrect.
Step 4: Conclusion.
Hence, the correct answer is (D) None of the above.