Mix Disign

– M – 20, M-25 M. K. SOIL TESTING LABORATORY, AHMEDABAD - 51

- : R E P O R T : -- : R E P O R T : -

CONCRETE MIX DESIGN FOR GRADE M - 20,CONCRETE MIX DESIGN FOR GRADE M - 20,

MONTH & YEAR : MONTH & YEAR :

FORWARDED FORWARDED

TOTO

BY

M.K.SOIL TESTING LABORATORY3, VINAKUNJ SOCIETY

OPP. R. R. DWIVEDI HIGHSCHOOL NEAR VASTRAPUR RAILWAY CROSSING

VEJALPUR, AHMEDABAD - 380 051.PHONE NO. : 079 – 2682 0940 FAX NO. : 079 – 2682 4587

EMAIL : [email protected]

≈ 0 ≈

mailto:[email protected]


Name of work : Mix Design For M - 20 Grade

Ref : Your letter No. [A] Design Stripulations :-

A) Characteristic Compressive Strength

Required in the field at the age of 28 days : 20 N/mm2

B) Maximum normal size of aggregates. : 20 mm

C) Degree of workability. : Low to Medium.

D) Method of compaction. : Vibrator.

E) Degree of quality control. : Good.

F) Type of Exposure. : Moderate.

[B] Test Data for Material Used :

Brand & Grade of Cement RESULT LIMIT AS PER IS

1) Type of cement Ultratech Cement 43 Grade --

2) Consistency 28.75 % ---

3) Fineness by Sieving 2.5 % Max 10 %

4) Setting time:

Initial time. 106.00 min Min 30 min

Final time. 210.00 min Max 600min

5) Soundness 2.1 mm Max 10 mm

6) Compressive Strength of Cement mortar cube of 50 cm2 area

Average of days Compressive strength 43 Grade cement

After at 3 Days 258 Kg/ cm2 Min 230 Kg/ cm2



≈ 1 ≈


[C] Fine aggregate: ( KHARI RIVER )

(1) Specific Gravity. : 2.66

(2) Fineness Modulus : 2.62

(3) Zone : II

(4) Water Absorption : 1.84 %

(5) Bulk Density (Kg/m³) : 1560 Kg/m³

(6) Silt Content : 2.00 %

[D] Coarse aggregate :

Parameters 10 - mm 20 – mm Limit as per IS 2386

Specific Gravity 2.76 2.87 ---

Water absorption 0.92 % 0.98 % Max 2%

Impact value 12.70 % 11.80 % Max 30%

Flankiness & Elongation Index 29.50 % 28.80 % Max 30%

Bulk Density (Kg/m³) 1507 1505 ----

Crushing vaiue 18.8% 19.2%

(1) Target mean strength of Concrete : 27.00 N/mm2

(2) Water – Cement ratio by weight : 0.50

(E) Materials required Per m3 ofConcrete

Per bag of cement

1. Cement 372.00 Kg. 50.00 Kg.

2. Fine Aggregate – Sand (0.34) 641.50 Kg. 86.22 Kg.

3. Metal No.1=20 mm (0.66) 852.00 Kg. 114.51 Kg.

Metal No.2=10 mm (0.34) 439.00 Kg. 59.00 Kg.

Total Coarse graded aggregate 1291.00 Kg. 173.52 Kg.

4. Water. 186.00 Litres 25.00 Litres

≈ 2 ≈


(F) Proportion of materials: Water : Cement : FA : CA

By weight 0.50 : 1 : 1.724 : 3.470

(G) Compressive Strength:

Three cubes of size 15cm x 15cm x 15cm

SRNO.

KIND OFSPECIMEN

INDENTITYMARK

SIZE

(CMXCMXCM)

DATE OFCASTINGAS PER CLIENT

DATE OFTEST

CRUSHING LOAD IN

KN

CRUSHINGSTRENGTH

(N/mm2)(7 DAYS)

1 CEMENT

CONCTETE

CUBE

M – 20 15 X 15 X 15

510

505

525

22.67

22.44

23.33

AVERAGE OF 3 CUBES 22.81

SRNO.

KIND OFSPECIMEN

INDENTITYMARK

SIZE

(CMXCMXCM)


DATE OFTEST

CRUSHING LOAD IN

KN

CRUSHINGSTRENGTH

(N/mm2)(28 DAYS)

1 CEMENT

CONCTETE

CUBE

M – 20 15 X 15 X 15

610

622

618

27.11

27.64

27.46


(H) Average Crushing Strength of Cubes of Three cubes of size 15cm x 15cm x 15cm

at 7 days : 22.81 N/mm2

at 28 days : 27.40 N/mm2

Remarks :

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1. The above recommendations are based on the use of surface dry aggregates,

hence due allowance must be made at the site of works for the water content in the

aggregates.

2. Concrete must be machined mixed and well vibrated under expert supervision.

3. Technical cement content shall be 372 kg/m3 of Concrete for M - 20 grade of

cement concrete with the consideration of 2.0% Entrained Air, for 20 mm aggregate

& 43 grade of cement.

4. No change in source of grading of aggregates shall be made unless permitted by

the undersigned.

ANNEXURE – A

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(A) Coarse Aggregate : 20 mm size

Sieve Size

(mm)

Weight Retained

(g)

Cumulative

(g)

Weight

Retained

(%)

Cum. Wt.

passing

(%)

40.00

20.00

10.00

4.75

--

275

4465

260

--

275

4740

5000

--

5.50

94.80

100

100

94.50

5.20

--

(B) Coarse Aggregate : 10 mm

Sieve Size

(mm)

Weight Retained

(g)

Cumulative

(g)

Weight

Retained

(%)

Cum. Wt.

passing

(%)

20.00

10.00

4.75

R

--

180

4530

290

--

180

4710

5000

--

3.60

94.20

100

100

96.40

5.80

--

(C) Sand ( Khari rive )

Sieve Size

(mm)

Weight

Retained

(g)

Cumulative

(g)

Weight

Retained

(%)

Cum. Wt.

passing

(%)

≈ 5 ≈


4.75

2.36

1.18

0.600 µ

0.300 µ

0.150 µ

0.075 µ

Residue

16

81

137

266

305

159

33

3

16

97

234

500

805

964

997

1000

1.60

9.70

23.40

50.00

80.50

96.40

99.70

100

98.40

90.30

76.60

50.00

19.50

3.60

0.30

--

(D) Water :-SR. NO.

PARAMATERS TESTED AS PER IS:3025

RESULTS LIMITS AS PER IS :456-2000

1. PH value -- 7.60 6.5 – 8.5

2. Chloride (mg/l) Part-32 304 Max 500 mg/l for RCCMax 2000 mg/l for PCC

3. Sulphate (mg/l) Part 24 125 Max 400 mg/l

4. T.D.S. (mg/l) Part 18 542 Max 3000 mg/l

5. S.S. (mg/l) Part 17 1.60 Max 2000 mg/l

6. Organic Matter Part 18 Nil Max 200 mg/l

7. Acidity Part 22 2.5 ml of 0.02NNaOH to neautralise

100ml sample

Max 5ml of 0.02N NaOH for 100ml sample to neutralise using

phenolphthalein as Indicator

8. Alkalinity Part 23 6.9 ml of 0.02NNa2so4 to neautralise

100ml sample

Max 25ml of 0.02NH2SO4 to

neutralise 100ml sample adding mixed indicate 2000 mg/l

Note :- Suitable For Concrete Mixing & Curing Work.

≈ 6 ≈


- : R E P O R T : -- : R E P O R T : -

CONCRETE MIX DESIGN FOR GRADE M - 25,CONCRETE MIX DESIGN FOR GRADE M - 25,

.

MONTH & YEAR : MONTH & YEAR :

FORWARDED FORWARDED

TOTO

BY

M.K.SOIL TESTING LABORATORY3, VINAKUNJ SOCIETY

OPP. R. R. DWIVEDI HIGHSCHOOL NEAR VASTRAPUR RAILWAY CROSSING

VEJALPUR, AHMEDABAD - 380 051.PHONE NO. : 079 – 2682 0940 FAX NO. : 079 – 2682 4587

EMAIL : [email protected]

Name of work : Mix Design For M - 25 Grade

≈ 7 ≈

mailto:[email protected]


Ref : Your letter No. [A] Design Stripulations :-

A) Characteristic Compressive Strength

Required in the field at the age of 28 days : 25 N/mm2

B) Maximum normal size of aggregates. : 20 mm

C) Degree of workability. : Medium.

D) Method of compaction. : Vibratior.

E) Degree of quality control. : Good.

F) Type of Exposure. : Moderate.

[B] Test Data for Material Used :

Brand & Grade of Cement RESULT LIMIT AS PER IS

1) Type of cement Ambuja Cement 43 Grade --

2) Consistency 29.5 % ---

3) Fineness by Sieving 2.8 % Max 10 %

4) Setting time:

Initial time. 105.00 min Min 30 min

Final time. 212.00 min Max 600min

5) Soundness 2.1 mm Max 10 mm

6) Compressive Strength of Cement mortar cube of 50 cm2 area

Average of days Compressive strength 43 Grade cement




≈ 8 ≈


[C] Fine aggregate: ( KHARI RIVER )

(1) Specific Gravity. : 2.66

(2) Fineness Modulus : 2.62

(3) Zone : II

(4) Water Absorption : 2.11 %

(5) Bulk Density (Kg/m³) : 1560 Kg/m³

(6) Silt Content : 2.00 %

[D] Coarse aggregate :

Parameters 10 - mm 20 – mm Limit as per IS 2386

Specific Gravity 2.76 2.87 ---

Water absorption 0.92 % 0.98 % Max 2%

Impact value 12.70 % 11.80 % Max 30%

Flankiness & Elongation Index 29.50 % 28.80 % Max 30%

Bulk Density (Kg/m³) 1507 1505 ----

Crushing vaiue 18.8% 19.2%

(1) Target mean strength of Concrete : 34.00 N/mm2

(2) Water – Cement ratio by weight : 0.46

(E) Materials required Per m3 ofConcrete

Per bag of cement

1. Cement 404.00 Kg. 50.00 Kg.

2. Fine Aggregate – Sand (0.34) 606.00 Kg. 75.00 Kg.

3. Metal No.1=20 mm (0.66) 841.00 Kg. 104.08 Kg.

Metal No.2=10 mm (0.34) 433.00 Kg. 53.58 Kg.

Total Coarse graded aggregate 1274.00 Kg. 157.67 Kg.

4. Water. 186.00 Litres 25.00 Litres

≈ 9 ≈


(F) Proportion of materials: Water : Cement : FA : CA

By weight 0.46 : 1 : 1.50 : 3.153

(G) Compressive Strength:

Three cubes of size 15cm x 15cm x 15cm

SRNO.

KIND OFSPECIMEN

INDENTITYMARK

SIZE

(CMXCMXCM)


DATE OFTEST

CRUSHING LOAD IN

KN

CRUSHINGSTRENGTH

(N/mm2)(7 DAYS)

1 CEMENT

CONCTETE

CUBE

M – 25 15 X 15 X 15

595

575

590

26.00

25.55

26.22


SRNO.

KIND OFSPECIMEN

INDENTITYMARK

SIZE

(CMXCMXCM)


DATE OFTEST

CRUSHING LOAD IN

KN

CRUSHINGSTRENGTH

(N/mm2)(28 DAYS)

1 CEMENT

CONCTETE

CUBE

M – 25 15 X 15 X 15

765

778

800

34.00

34.57

35.55


(H) Average Crushing Strength of Cubes of Three cubes of size 15cm x 15cm x 15cm

at 7 days : 25.92 N/mm2

at 28 days : 34.70 N/mm2

]

Remarks :

5. The above recommendations are based on the use of surface dry aggregates,

hence due allowance must be made at the site of works for the water content in the

aggregates.

≈ 10 ≈


6. Concrete must be machined mixed and well vibrated under expert supervision.

7. Technical cement content shall be 404 kg/m3 of Concrete for M - 25 grade of

cement concrete with the consideration of 2.0% Entrained Air, for 20 mm aggregate

& 43 grade of cement.

8. No change in source of grading of aggregates shall be made unless permitted by

the undersigned.

ANNEXURE – A

(E) Coarse Aggregate : 20 mm size

≈ 11 ≈


Sieve Size

(mm)

Weight Retained

(g)

Cumulative

(g)

Weight

Retained

(%)

Cum. Wt.

passing

(%)

40.00

20.00

10.00

4.75

--

275

4465

260

--

275

4740

5000

--

5.50

94.80

100

100

94.50

5.20

--

(F) Coarse Aggregate : 10 mm

Sieve Size

(mm)

Weight Retained

(g)

Cumulative

(g)

Weight

Retained

(%)

Cum. Wt.

passing

(%)

20.00

10.00

4.75

R

--

180

4530

290

--

180

4710

5000

--

3.60

94.20

100

100

96.40

5.80

--

(G) Sand

Sieve Size

(mm)

Weight

Retained

(g)

Cumulative

(g)

Weight

Retained

(%)

Cum. Wt.

passing

(%)

≈ 12 ≈


4.75

2.36

1.18

0.600 µ

0.300 µ

0.150 µ

0.075 µ

Residue

16

81

137

266

305

159

33

3

16

97

234

500

805

964

997

1000

1.60

9.70

23.40

50.00

80.50

96.40

99.70

100

98.40

90.30

76.60

50.00

19.50

3.60

0.30

--

(H) Water :-SR. NO.

PARAMATERS TESTED AS PER IS:3025

RESULTS LIMITS AS PER IS :456-2000

1. PH value -- 7.60 6.5 – 8.5

2. Chloride (mg/l) Part-32 304 Max 500 mg/l for RCCMax 2000 mg/l for PCC

3. Sulphate (mg/l) Part 24 125 Max 400 mg/l

4. T.D.S. (mg/l) Part 18 542 Max 3000 mg/l

5. S.S. (mg/l) Part 17 1.60 Max 2000 mg/l

6. Organic Matter Part 18 Nil Max 200 mg/l

7. Acidity Part 22 2.5 ml of 0.02NNaOH to neautralise

100ml sample

Max 5ml of 0.02N NaOH for 100ml sample to neutralise using

phenolphthalein as Indicator

8. Alkalinity Part 23 6.9 ml of 0.02NNa2so4 to neautralise

100ml sample

Max 25ml of 0.02NH2SO4 to

neutralise 100ml sample adding mixed indicate 2000 mg/l

Note :- Suitable For Concrete Mixing & Curing Work.

≈ 13 ≈

Mix Disign

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