The strength of concrete depends on :
A. Type of mortar
B. Proportion between coarse and fine aggregates
C. Water-Cement ratio
D. Temperature at the time of mixing
Choose the correct answer from the options given below :
A. Type of mortar
B. Proportion between coarse and fine aggregates
C. Water-Cement ratio
D. Temperature at the time of mixing
Choose the correct answer from the options given below :
Show Hint
- B and C only
- C only
- A and B only
- B and D only
The Correct Option is A
Solution and Explanation
Step 1: Evaluate Water-Cement Ratio (C).
Abrams' Water-Cement Ratio Law states that the strength of a concrete mix depends primarily on the $w/c$ ratio, provided the mix is fully compacted. A higher ratio increases porosity, significantly reducing strength. This is the most dominant factor.
Step 2: Evaluate Aggregate Proportion (B).
The ratio between coarse and fine aggregates affects the packing density and workability. A well-graded mix with proper proportions ensures minimum voids and better mechanical interlocking, which contributes to overall compressive strength.
Step 3: Evaluate A and D.
Concrete is not made of "types of mortar" (A); it *is* a mix of cement, aggregates, and water. While extreme temperatures (D) can affect early-age hydration or cause flash setting, the *ultimate strength* is a function of the materials and proportions used, with $w/c$ being the key variable.
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