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EXPERIMENT NO AIM :- To perform water absorption test ... - Raisoni

EXPERIMENT NO AIM :- To perform water absorption test ... - Raisoni

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PROCEDURE:-<br />

OBSERVATION TABLE :-<br />

SR<br />

No<br />

1<br />

2<br />

3<br />

4<br />

Weight of<br />

aggregates<br />

(1)Make the Pycnometer dry &Weight it with its cap &rin g<br />

(2)Unscrew the cap &Rut 200 gms of aggregate &Weight it<br />

(3)Add <strong>water</strong> to the top of brass cap. Remove all the trapped dir by pouring<br />

additional <strong>water</strong><br />

(4)Dry the Pycnometer & fell it to the top with & weight it<br />

(5)Repeat the Pro cedure<br />

(6)Find the average specific gravity by using formula<br />

Weight of<br />

empty<br />

pycnometer<br />

(W1)gm<br />

SAMPLE CALCULATION:-<br />

Weight of<br />

pycnometer<br />

+aggregate<br />

(W2) gm<br />

Average specific gravity =<br />

(W2-W1) Specific gravity =<br />

(W2-W1) – (W3-W4)<br />

G =<br />

Weight of<br />

pycnometer<br />

+<strong>water</strong><br />

+aggrate<br />

(W3) gm<br />

RESULT:-<br />

Average specific gravity is found to be ___________<br />

PRECAUTIONS:-<br />

DISCUSSIONS:-<br />

(1) Take the weight carefully.<br />

(2) Pycnometer must be dry for use.<br />

Weight of<br />

Pycnometer<br />

+<strong>water</strong><br />

(W4) gm<br />

(3) There should be no air bubble inside the bottle.<br />

Specific<br />

gravity<br />

The value of specific gravity of aggregate is required for<br />

concrete mix design and useful for calculating <strong>water</strong> content. Stone having<br />

higher <strong>water</strong> <strong>absorption</strong>s values are porous and this weaker specific gravity<br />

also indicates strong specimen.

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