libyan cement standard lss 340_2009.doc

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Libyan Standard Specifications № (340/2009)

Translation from Arabic 06/01/2010

Great Socialist People’s Libyan ArabJamahiriya

Libyan National Center for Standardization and Metrology

LIBYAN STANDARD SPECIFICATIONSNo. (340/2009)

Portland cement




First edition 2009




Contents

Subject Page

Introduction 2

1. Field ………………………………………………………………………………………... 2

2. Identification ……………………………………………………………………………… 2

3. Types of Portland cement ……………………………………………………………… 2

4. Other types ……………………………………………………………………………… 4

5. Standards conditions …………………………………………………………………… 4

6. Quality control …………………………………………………………………………… 6

7. Packaging and explanatory data ……………………………………………………… 6

8. Factory certificate ……………………………………………………………………… 7

9. Sampling methods ……………………………………………………………………… 7

10. Refusing shipments ………………………………………………………………… 8

11. Storing ………………………………………………………………………………….. 8

12. Technical terms ……………………………………………………………………… 10

13. References ……………………………………………………………………………. 11

14. Parties participated in preparing these specifications ………………………………. 11




Introduction

This standard was elaborated by the technical committee of preparing the concrete and liaisonmaterials standards, and it is and updating of the Libyan standard specifications № (340/97)related to Portland cement, the Libyan Standard specifications № (470/2002) related toconstruction Portland cement and Libyan Standard specifications № (22/1972) related to whitePortland cement, and it shall replace the stated specifications.

These standard specifications were approved by virtue of the decision of the president of highcommittee of the Libyan National Center for Standardization and Metrology № 1/2009.




1. Field

These specifications determine the standard conditions which shall be in the different types of

the Portland cement more general and used.

2. Identification*

2.1. Portland Cement

Portland cement resulted from grinding of clinker, some principal compounds stated in

the table № (1) and raw plaster with little filling** additives. The Portland cement clinker

may be obtained by burning the limy and muddy materials with some other additives

with specific percentages at a suitable temperature. The Portland cement has a good

cohesion after a period by adding the water to it then it going solid due to its reaction

with water either it was on the air or in the water.

When manufacturing the Portland cement the addition ratios shall be observed as

stated in table № (1).

2.2. Principal additivesAdditives of inorganic materials which product a cement of type (II) according to the

principal calcification stated in table № (1).

2.3. Secondary additives (filling)

They are natural inorganic or industrial materials which may have hydraulic

characteristics to improve the cement physical characteristics and after good

preparation thereof, they are generally composed of gypsum and inorganic materials which shall not exceed 5 %.

3. Types of Portland cement

Refer to table (1) which states clearly the types of Portland cement.

* Referring to the European specifications № BS EN197-1:2000 to know any identification not stated herein** Ratio of filling additives (gypsum + filling materials) 5 %




Table (1): Types of Portland cement

Principal classificatio

n

Types of Portland cement

Sub-classificatio

n

Composition by weight (%)

Principal compounds1

Clinker %

Highoven

sslag%

Silicat e dust

%

Puzzolana 2 Dust 3

Limestone %

Fillingadditive

s %Natura

l %Industria

l %Cellulosi c ash %

Limy ash %

I

P o r t l a n d c e m e n t

Ordinary I-1

95-100 0-5

ModifiedI-2

Lowhydrationheat

I-3

Sulfateresisting

I-4

WhiteI-5

II

P o r t l a n d c e m e n t m i x e d

w i t h Slag

II-1-1 94-80 6-20

0-5

II-1-2 65-79 21-35

Silica dust II-2 90-94 6-10

AshII-3-1 80-94 6-20 6-20

II-3-2 65-79 21-35 21-35

LimestoneII-4-1 80-94 6-20

II-4-2 65-79 21-35

PuzzolanaII-5-1 80-94 6-20 6-20

II-5-2 65-79 21-35 21-35

1 When using any principal compounds stated in this table, refer to European specifications № BS EN197-1:2000

which determinates all standard conditions of these compounds.2 Stated ratios shall be added on basis of natural pozzolana or industrial pozzolana.3 Stated ratios shall be added on basis of cellulosic ash or limy ash.




4. Other types

The article № (3) covers all Portland cement types more general, in case of use a type

not stated in article № (3) refer to the Libyan National Center for Standardization and

Metrology in this respect.

5. Standard conditions

5.1. Physical and mechanical standard conditions of Portland cement

All types of cement stated in article № (3) shall fulfill the physical and mechanical

standard conditions stated in the table № (2).

5.2. Chemical standard conditions of Portland cement

All types of cement stated in article № (3) shall fulfill the chemical standard conditionsstated in the table № (3).




Table № (2): Physical and mechanical standard conditions of Portland cement

Classification of cement pursuant to

standard strength

Compressive strength1

Initial setting

time (mn)not less

than

Soundness (distension) 2

Heat of hydration3

(joule/g) not exceeding

Whiteness 4for white

cement

Early strength Standard strength

Lochatellet not exceeding

(mm)

Autoclavenot

exceeding %

7 days

28 days 2

days7

days 28 days

Not less

Not less

Not less

Not less

32.5 N - 16

32.5 52.5 75

10 0.8 250 290 80 %

32.5 R10 -

42.5 N10 -

42.5 62.5 60

42.5 R20 -

52.5 N20 -

52.5 - 45

52.5 R30 -

1 The compressive strength test shall be done on samples of cement using standard cement stipulated in theinternational standard specifications № (ISO 679:2009)

2 The evaluation shall be done thru one of the stated two tests3 Stipulated for the low heat hydration Portland cement4 The magnesium strip shall be used to determinate the whiteness degree

- Not stipulated- N- normal early compressive strength- R- Quick early compressive strength




Table (3): Chemical standard conditions of Portland cementMaximum limit of permitted percentage1

Type

Description

Types of Portland cement

Ordinary Modified Low hydration

heat Sulfate

resistingWhite

Ovensslag

Silica Fly ash Limestone Pozzola

Loss on ignition 5.0 -

Insoluble residue % 5.0 -

Sulfur thirdoxide %

32.5 N

3.532.5 R

42.5 N

42.5 R

4.052.5 N

52.5 R

Magnesium oxide % 5.0

Chlorides % 0.1

Alkali content2 % -

Tricalcium silicate (C3S) % - - 35 - - -

Dicalcium silicate (C2S) % - - 40 - - -

Tricalcium aluminate (C3A) % - 8.0 7.0 5.0 - -

1 All stated ratios represent the maximum limit except dicalcium silicate (C 2S) which represent the minimum limit.2 When using a heap reactive with the cement alkalis, the maximum limit of the alkali contents 0.6%. [The alkali contents = sodium oxide ratio + (0.658 * potassium oxide ratio)]- Not stipulated




6. Quality control

6.1. The manufacturer shall ensure that the produced cement is in compliance with the

specifications mentioned herein.

6.2. The competent authority shall have the right to take random samples from the

produced cement, during sudden or routine visits to the manufacturers, in order to

ensure their conformity with the standards conditions herein.

6.3. When releasing a controlled cement shipment before completion of compressive

strength test (28 days), and the required chemical, physical and mechanical tests were

done according to this standard, it is allowed to permit it if realized the following:

6.4.1. The chemical, physical and mechanical tests shall be executed according to the

specifications approved by the center.

6.4.2. The physical tests results (setting and expansion time) shall be conform to the

conditions stipulated herein.

6.4.3. The compressive strength test result at two days or seven days (as case) shall be

conform to the conditions stipulated herein.

7. Packing and illustrative information

7.1. Cement will be packed in bags conforming to the standards specifications in which the

capacity of each bag (50 ± 1 kg) or any other capacity will agree upon between the

seller and buyer provided that the difference in weight (± 2 %). All bags should have

the following details:

7.1.1. A phrase showing that it’s Portland cement with its type and specification number.




7.1.2. Net weight by kilogram

7.1.3. Manufacturer name and his trademark and address.

7.1.4 Manufacturing country name

7.2. The cement can be delivered bulk in tanks on special trucks for that purpose attached

with a certificate showing that it’s Portland cement with its type and specification, new

weight, Manufacturer name, his address, delivery date and truck or trailer number.

8. Factory Certificate

The factory shall present, upon demand, a certificate stating that the produced cement is

conforming to mentioned requirements in these specifications illustrating cement type and the

tests results.

9. Methods of taking samples:

By checking the cement conformation of the mentioned standard conditions in this

specification, the samples will be taken by following steps:

9.1. The samples will be taken within a period not more than seven days from the cement

delivery date and kept in clean, dry, close and anti-humidity and air.

9.2. One sample will be taken for each shipment; the shipment weight should not be more

100 Tons. If it’s more than this limit, it will be divided into several shipments, the weight

of each one not more than 100 Tons.

9.3. The sample weight will be 20 kg and will be formed by collecting twelve secondary

samples at least will be taken from separate places from each shipment. The

secondary samples of the bagged cement will be taken by using special tube for that

purpose as in figure (1). Also, it will be taken from various depths from the bulk cement




not more than two meters by using pierced tube as per figure (2). Moreover, the

samples will be taken from the bulk cement during shipping or discharging by taking

random samples on separate periods.

9.4. The samples will be mingled well then divided into four equal divides. Each division

shall preserved in clean, dry, close and anti-humidity and air, then it should be

numbered and dated then signed by the sample collector or by the concerned

authorities. Then, the four samples will be distributed between the seller, buyer, and

the laboratory and the fourth sample will be kept at the control concerned authority.

10. Refusing shipments

The shipment will be rejected in case of its no conformation to any of the mentioned

conditions in this specification. The rejection will be after making sure of its no

conformation with making the required tests. These tests will be done by two neutral

laboratories at least.

11. Storing

11.1 The bagged cement should be stored in anti-humidity warehouses. Moreover, the

various shipments should be ordered in regular rows not more than eight bags high in

order to be easy to reach each shipment easily. The shipments drawings should be

done regularly when used according to its arrival order to the warehouse.

11/2 The bulk cement should be stored at prepared silos for that purpose and conformingthe related specifications.




13. References

13.1. Libyan standard specifications № 340/1997 – Portland cement

13.2. Libyan standard specifications № 22/1972 – white cement

13.2. Libyan standard specifications № 470/2002 – construction Portland cement

13.4. European standard specifications № BS EN 197-1:2000

14. Parties participated in preparing these specifications

14.1. Libyan National Center for Standardization and Metrology

14.2. Industrial researches center

14.3. Al-Fateh University – Faculty of Engineering

14.4. National company for cement Inc.

libyan cement standard lss 340_2009.doc

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