K Laboratories, Inc

2323 Jackson St Oshkosh, WI 54901, 920 426 2222

Fax (920) 273-6128 and E-mail akkhwaja@aol.com

 

                                                                                                            Date:  April 16, 2007

SPECIFICATION OF ORDINARY PORTLAND CEMENT   42.5 or 53 – GRADE

EQUIVALENT TO BS 12/1996

TEST AND COMPLIANCE :

 

 

 

PERTICULARS

UNIT

OUR

REQUIREMENT OF

 

 

SPECIFICATIONS

IS 12269 : 1987

A. CHEMICAL REQUIREMENTS :

 

 

 

 

 

 

 

1. Lime Saturation Factor

 

0.91 - 0.98

0.80 - 1.02

2. Ratio of Percentage of Alumina to

 

1.20 -1.60

 

     that of Iron Oxide

 

 

0.66 Min

3. Insoluble Residue

%

1.1 Max

3.00 Max

    ( percent by mass )

 

 

 

4. Magnesia ( percent by mass )

%

1.0 Max

6.00 Max

5. Sulphuric Anhydride (SO3 )

%

2.8 Max

3.00 Max

    ( Percent by mass )

 

 

 

6. Loss On Ignition

%

2.5 Max

4.00 Max

7. Chloride ( Percent by mass )

%

0.07 Max

0.10 Max

 

 

 

 

B. PHYSICAL REQUIREMENTS :

 

 

 

 

 

 

 

1. Fineness ( Blaine )

M2 / Kg

290 Min

225 Min

2. Soundness

 

 

 

a. Le. Chatelier Expansion

mm

5.0 Max

10.00 Max

b. Autoclave Expansion

%

0.6 Max

00.8 Max

3. Setting Time

 

 

 

a. Initial

Minutes

100 Min

30 Min

b. Final

Minutes

280 Max

600 Max

4. Compressive Strength

 

 

 

a. 72+ 1 hours ( 3 days )

Mpa

35.0 Min

27 Min

b. 168 + 1 Hours ( 7  days )

Mpa

47.0 Min

37 Min

c. 672 + 4 hours ( 28 days )

Mpa

58.0 Min

53 Min

 

 

 

 

The above cement complies with the requirement of IS 12269 : 1987 in respect of test carried

out

 

 

 

Quantity 8000mt/10days Total 450000mts Slag blended. Slag % must be 18 to 20%.

Quantity 8000mt/10day Total 150000mts Fly ash blend.

Please we need clinker specification as below sent .

 

 

CLINKER SPECIFICATION FOR EXPORT

 

Sio2

21 – 22%

Al2o3

5 – 5.50%

Fe2o3

4 – 4.50%

Cao

65.50 – 66.20%

Mgo

1.50 % Max.

So3

1.00 % Max.

Loss on ignition

0.75 % Max.

Total Alkalies

0.70 % Max.

Insoluble Residue

0.40 % Max.

Free Lime

2.00 % Max.

LSF

94 – 96 %

C3S

63 – 65 %             Important

C2S

10 – 18 %

C3A

  6 – 8 %

Bulk Density

1.30 – 1.45 (Gm. /Ltr)

Moisture

0.5 % Max.

Size

+ 3 mm  – Min. 70 %

– 3 mm  – Min. 30 %

 

FORMULAE:                                                       

ญญญCao

1.     LSF =     --------------------------------------------------

     2 .8 Sio2 + 1.2 Al2o3 + 0.65 Fe2o3

 

2.     C3S =     4.07 Cao  – (7.6 sio2 + 6.72 Al2o3 + 1.43 Fe2o3)

 

3.     C2S =     2.87 sio2 – 0.754 C3S

 

4.     C3A =    2.65 Al2o3

 

Quantity

1.40000mts X 3 Shipment for Port of Richard Bay S Africa.

2.22500mts X 4 Shipments to the Port of Durban

draught available 8.8mtr at Durban.

Please quote CNF price.