To find the strength characteristic of concrete with varying water cement ratio and plat a curve between strength and w/c ratio.

 

OBJECT: To find the strength characteristic of concrete with varying water cement ratio and plat a curve between strength and w/c ratio.

OBSERVATION: - (1:2:4)

Weight of cement…………… Kg.

Weight of fine aggregate…………...Kg.

Weight of coarse aggregate………… Kg.

Size of cube………...= 15x15x15 cm.

 

S.No.	W/C ratio	Weight of Water Kg.	Identification mark	Age of test days.	Cube crushing Load Kg.	Cube Crushing strength Kg./m2
1.	0.50
2.	0.55
3.	0.60

 

RESULTS: The plat of strength V/s water cement ratio is enclosed

 

DISCUSSION: Cover the following points:

I. Water cement ratio law.

II. Effect of variation of water cement ratio on workability and corresponding effect on

strength.

III. Comments on results obtained

IV. Expected strength for an assumed w/c ratio, Ref. IS 456-1978

 

NOTE:

1. Prepare 15 cm cube for each water-cement ratio.

2. Keep the proportion of mix 1:2:4

3. Test all the cubes at an age of 28 days