Which of the following is not a test for measuring the workability of concrete?
- ASlump test
- BFlow test
- CLe Chatelier’s TestCorrect
- DCompaction factor test
Solution
Concept
Workability testing methods for concrete
Formula
NONE
Step-by-step solution
1. Workability of concrete is measured using tests like Slump test, Flow test, Compaction factor test, and Vee-Bee test. 2. Le Chatelier’s Test is used to determine the soundness of cement due to free lime. 3. Therefore, Le Chatelier’s Test is not used for measuring the workability of concrete. Answer: C
Explanation
Le Chatelier test is used to measure the soundness or expansion of cement, not the workability of concrete. Slump, flow, and compaction factor tests are all standard tests designed to evaluate concrete workability and consistency. Therefore, Le Chatelier test is the correct answer as it measures cement soundness.
Why the other options are wrong
A) Slump test is a standard field test used to measure the workability and consistency of concrete. B) Flow test measures the workability and flowability of concrete mixes. D) Compaction factor test determines workability by measuring the degree of concrete compaction.
Shortcut
Le Chatelier test measures soundness (expansion), not concrete workability.
Common mistake
Confusing Le Chatelier’s test for cement soundness with concrete workability tests.
Correct answer: C) Le Chatelier’s Test