MANUFACTURER'S TEST CERTIFICATE (OPC}

IN ACCORDANCE WITH BRITISH STANDARD SPECIFICATION BS 4027/1996 FOR SULFATE RESISTING PORTLAND CEMENT CLASS 42.5 N

 

SPECIFICATION TEST

Chemical parameters

Constituents

MAX

MIN

RESULTS

SILICON Dl-OXIDE

Si02 %

--

-- 

20.96

ALUMINIUM OXIDE

A1203 %

 --

 --

4.1]

FERRIC OXID

Fe203 %

 --

 --

4.88

CALCIUM OXIDE

CaO %

 --

 --

63.45

MAGNESIUM OXIDE

MgO %

5.0

 --

1.34

POTASSIUM OXIDE

KO %

--

--

0.64

SODIUM OXIDE

Na;0 %

--

--

032

SULPHURIC ANHYDRIDE

S03 %

2.5

--

1.93

CHLORIDE

CI %

0.1

 --

0

LOSS ON IGNITION

%

3.0

 --

2.21

INSOLUBLE RESIDUE

%

1.5

 --

0.42

TRI CALCIUM ALUM1NATE

%

3.5

 --

2.64

Physical Testing

SPECIFICATION

TEST RESULTS

1. FINENESS SPECIFIC SURFACE fm^ket

--------

374

2. SETTING TIME (minutes) (A) INITIAL SET

60

Minimum

160

3. SOUNDNESS (mm) (LECHATLIER)

(A) 24 HOURS EXPANSION

(B) IF ABOVE TEST FAILS, EXPANSION AFTER 7 DAYS AERATION.

 

10

5

 

Maximum Maximum

 

1.0

---

4. COMPRESSIVE STRENGTH (N/mm2) Mortar Prisms

(A) 2 DAYS

(B) 7 DAYS

(C) 28 DAYS

 

 

 

10

42.5 to 62-5

 

 

Minimum

 

 

21.5

 34.2

 46.2

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