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Q: In the method of voids for determination of the quantity of cement paste, it is assumed that.
  • A. Voids is coarse aggregates are filled by fine aggregates
  • B. Voids in fine aggregates are filled by the cement paste
  • C. Volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra
  • D. All option are correct
Correct Answer: Option D - The quantity of cement paste is determined by following methods– (i) Fineness modulus method (ii) Minimum void method or method of voids. (iii) Maximum density method (iv) Water cement ratio method. Assumptions of minimum void method: The quantity of sand should be such that it completly fills the voids of coarse aggregate. Similary, the quantity of cement used such that it fills the voids of sand so that a dense mix aggregate should be 10% more than voids of coarse aggregate & cement should be 15% more than voids of sand.
D. The quantity of cement paste is determined by following methods– (i) Fineness modulus method (ii) Minimum void method or method of voids. (iii) Maximum density method (iv) Water cement ratio method. Assumptions of minimum void method: The quantity of sand should be such that it completly fills the voids of coarse aggregate. Similary, the quantity of cement used such that it fills the voids of sand so that a dense mix aggregate should be 10% more than voids of coarse aggregate & cement should be 15% more than voids of sand.

Explanations:

The quantity of cement paste is determined by following methods– (i) Fineness modulus method (ii) Minimum void method or method of voids. (iii) Maximum density method (iv) Water cement ratio method. Assumptions of minimum void method: The quantity of sand should be such that it completly fills the voids of coarse aggregate. Similary, the quantity of cement used such that it fills the voids of sand so that a dense mix aggregate should be 10% more than voids of coarse aggregate & cement should be 15% more than voids of sand.