Report Fineness Test Conc

8/13/2019 Report Fineness Test Conc.

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CC203CONCRETE TECHNOLOGY

CIVIL ENGINEERING DEPARTMENT

POLYTECHNIC OF SULTAN AZLAN SHAH

GROUP NAME

GROUP 1

LABORATORY/WORKSHOPS NAME

CONCRETE LABORATORY

LECTURERS NAME

EN. NAHAR EFFENDI BIN SHAARI

NUMBER OF PRACTICAL

4

TITLE OF PRACTICAL

FINENESS TEST

LECTURERS COMMENTDATE OF PRACTICAL : 26/03/2013

DUE DATE : 26/03/201329/03/2013

STUDENTS NAME :

MOHAMAD SAFUAN BIN ABDUL

KHARIS

15DKA12F1035


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EXPERIMENT: 2

TITLE : FINENESS TEST

OBJECTIVE : To determine the fineness of cement by drying sieving

THEORY

So we need to determine the fineness of cement by drying sieving per IS:

4031(Part 1)1996. The principle of this is that we determine the proportion of

cement whose grain size is larger than specified mesh grain

APPARATUS

90m IS Sieve Balance capable of weighing 10g to the nearest 10mg A nylon or pure bristle brush. Preferably with25 to 40mm bristle, for cleaning the sieve Sieve shown in picture below is not the actual 90 m sieve

MATERIAL

Ordinary Portland Cement


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PROCEDURE

:Procedure to determine fineness of cement

I. Weight approximately 10g of cement to the nearest 0.01g and place it onthe sieve

II. Agitate the sieve by swirling, planetary and linear movements, until nomore material passes through it

III. Weight the residue and express its mass a percentage R1, of the quantityfirst placed on the sieve to the nearest 0.1 percent.

IV. Gently brush all the fine material off the base of the sieve

V. Repeat the whole procedure using a fresh 10g sample to obtain R2, R3 andR4. Then calculate R as the mean of R1 and R2 as a percentage average,

expressed to the nearest 0.1 percent. When the results differ by more than

1 percent absolute, carry out a third sieving and calculate the mean of the

three values.


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Reporting of Results

Report the value of R, to the nearest 0.1 percent, as the residue on 90m sieve

% Weight of Residue , R1 =

Limits:

The percentage of residue should not exceed 10%

Precaution:

Sieving shall be done holding the sieve in both hands and gentle wrist motion, this

will involve no danger of spilling the cement, which shall be kept well spread out

on the screen. More or less continuous rotation of the sieve shall be carried out

throughout sieving.

Washers, shots and slugs shall not be used on the sieve. The underside of the

sieve shall be lightly brushed with a 25 or 40mm bristle brush after every five

minutes of sieving

Mechanical sieving devices may be used, but the cement shall not be rejected if it

meets the fineness requirement when tested by the hand method.


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RESULT

R1 R2 R3 R4

Weight of sieve

(kg)

0.261 0.261 0.260 0.260

Weight of Sieve

+ Sample(kg)

0.271 0.271 0.270 0.270

Weight of Sieve

+ Sample

retained(kg)

0.269 0.268 0.268 0.269

Sample retained

on sieve(kg)

0.008 0.007 0.008 0.009

Percentage

weight of

residue

0.8% 0.7% 0.8% 0.9%


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QUESTION

1. Why do you need to do this for cement?2. What the implication of fineness cement to the concrete mixture

ANSWER

1. The fineness test need to do to the cement to ensure the cement havebeen grinded properly

2. The fineness cement could cause the workability of the concrete mixtureincrease. Besides that it also prevents the concrete mixture from bleed.


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DISCUSSION

Based on the test that been done, there are few things can be discussed:-

From the experiment, percentage weight of residue for all experiment areless than 1%,thus shown the cement are finest

Highest fineness of cement causing higher rate of workability

The agitation of the sieve should not been harsh to prevent the cementfrom spread out from the sieve

CONCLUSION

From the fineness test have been done, there percentage weight of residue for all

experiment are less than 1%. This conclude that the cement are fine and suitableto being used in concrete mixture for construction.

Documents

Report Fineness Test Conc