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MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG, NEW DELHI

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सीईडी CED 2 (10874)WC माा र ा टभलड ट –मिम मि

ICS No. 91.100.10

ा ा ा िल म‍ म ा ए क क ा र ाम ल ‍ ि ा िा ा ा ‍ ा रि ा ा ।

म‍ म ा ी म म म 18 क म 2016

म‍ म क ा divya.s@bis.org.in ल ।

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MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG, NEW DELHI 110002

DOCUMENT DESPATCH ADVICE

TECHNICAL COMMITTEE: Cement and Concrete Sectional Committee, CED 2

ADDRESSED TO:

1. All Members of Civil Engineering Division Council, CEDC

2. All Members of CED 2,

3. All others interested

Dear Sir (s), Please find enclosed the following documents:

Doc No. Title

CED 2 (10874)WC PORTLAND MICRO-FINE CEMENT SPECIFICATION ICS No. 91.100.10

Kindly examine the draft and forward your views stating any difficulties which you are likely

to experience in your business or profession, if this is finally adopted as National Standard. Last Date for comments: 18 December 2016. Comments if any, may please be made in the format as given overleaf and mailed to

divya.s@bis.org.in or ced2@bis.gov.in. In case no comments are received or comments received are of editorial nature, you will

kindly permit us to presume your approval for the above document as finalized. However, in case comments of technical in nature are received then it may be finalized either in consultation with the Chairman, Sectional Committee or referred to the Sectional Committee for further necessary action if so desired by the Chairman, Sectional Committee.

The documents are also hosted on BIS website www.bis.org.in.

Thanking you,

Yours faithfully,

(B K Sinha) Encl: as above

Head (Civil Engg.

DRAFTS IN WIDE CIRCULATION

Reference Date

CED 2:1/T-68 19 10 2016

Doc: CED 2 (10874)

October 2016

BUREAU OF INDIAN STANDARDS

DRAFT FOR COMMENTS ONLY (Not to be reproduced without the permission of BIS or used as an Indian Standard)

Draft Indian Standard

PORTLAND MICRO-FINE CEMENT SPECIFICATION

ICS No. 91.100.10

Cement and Concrete Last date for Receipt of Sectional Committee, CED 2 Comments: 18 December 2016

FOREWORD (Formal Clauses of the foreword will be added later) Ordinary Portland Cement (OPC) in India is available in three grades. The three grades cement fineness is specified in term of minimum fineness as determined by Blaine air permeability method. This results in inadequacy in certain specialized application of grouting and repairs. Besides, the overall fineness for successful grouting and repairs, it is important to focus on the particle size distribution of cement and cementitious materials. This standard is being brought out to recommend the various characteristics and properties of microfine cement to differentiate from the OPC in special applications like rock grouting, repairs of deteriorated/damaged structures, in injecting in underground construction and soil stabilization. It also helps to check import of micro-cement. Studies and applications have shown that cement of very high fineness and suitable particle size distribution gives better performance in the above referred applications on account of its ability to incorporate into micro-cracks/fissures and porous areas of the natural cracks/soils strata and damaged/deteriorated concrete members. They also should have special properties like excellent inject-ability (penetration ability) and suitable setting. In the preparation of this standard , due weightage has been given to the practices followed in International Organization for Standardization (ISO) so as to align this standard with it. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated ,expressing the result of a test

or analysis ,shall be rounded off in accordance with IS 2. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

Doc: CED 2 (10874) October 2016

Draft Indian Standard

PORTLAND MICRO-FINE CEMENT SPECIFICATION

1 SCOPE

This standard covers the manufacture and chemical and physical requirements for Portland micro-fine cement.

2 REFERENCES

The Indian Standards listed in Annex A contain provisions which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated.

3 TERMINOLOGY

For the purpose of this standard, the definitions given in IS 4845and the following shall apply. 3.1 Portland micro-fine cement: Ground and classified Portland cement with specified particle size distribution and requirements as per this standard. 4. MANUFACTURE

The cement shall be manufactured by intimately mixing from silicious and calcareous materials and /or other silica, alumina or iron bearing materials burning them at a clinkering temperature by means of specially developed manufacturing process and grinding the resultant clinker so as to produce a cement capable of complying with specifications of IS 269. No material other than gypsum (natural or chemical), water and not more than 5% additives which have proved not to be harmful and do not have any negative influence on the properties shall be added during grinding or blending of the cement. Otherwise, Ordinary Portland Cement conforming Indian Standard Specifications may be used as raw material. This is followed by separating the desired particles size by cyclone separator or by a suitable separator system.

5. CHEMICAL REQUIREMENTS

5.1. The chemical requirements of Portland micro fine cement shall be as laid in IS

269as per the raw material used.

PHYSICAL REQUIREMENTS 5.2. Fineness ‒Fineness of cement expressed in terms of specific surface

determined by B E T method (Nitrogen absorption) described in IS 15388 shall not

be less than 600m2/kg (optional Test). This method can be used for control

purposes at manufacturing site.

6.2 Particle size‒ To maintain a high level of accuracy in the particle size distribution, control of grain size around 15 microns in cement is to be maintained. Particle Size Analyseris to be used for its determination. The micro-fine cement shall have the following particle size maximum. d50 d95

Particle size maximum ‒ 10 µm 20 µm d95 indicates that 95 percent of the particles on a mass basis are below a given size (diameter) while d50 indicates that 50 percent of the particles on a mass basis are below a given diameter. 6.3 Setting time (as per the Annex B) At 1:1 water andPortlandmicrofine cement ratio(by weight) of standard temperature

27+- 2 ℃, Humidity >65 percent. Initial setting time, h ‒ 1,Min. Final setting time, h ‒ 20,Max. 6.4 Bleeding test(as per the Annex C) Shall be less than 5 percent. 6.5 Compressive Strength For compressive strength test, with w/c of 0.5 and cement and sand in the ratio of 1:3.0 is to be used. For mixing, casting specimens and testing as per IS 4031 (Part 8) is to be used. The compressive strength is determined using mortar prisms. The average compressive strength of six cubes shall comply with each age of3, 7 and 28 days strength specified. Note: Notwithstanding the strength requirements, the compressive strength shall show a progressive increase in strength specified at 3 day.

7. STORAGE

7.1 The Portland micro- cement shall be stored in such a manner as to permit easy access for proper inspection and identification, and in a suitable weather-tight building to protect the cement from dampness and to minimize warehouse deterioration (see also IS 4082). 8 MANUFACTURER’S CERTIFICATE 8.1 The manufacturer shall satisfy himself that the Portland micro cement conforms to the requirements of this standard and, if requested, shall furnish a certificate(except 7 and 28days strength) to this effect to the purchaser or his representative, within ten days of dispatch of the cement. 8.2 The manufacturer shall furnish a certificate, within ten days of dispatch of the cement, indicating the total chloride content in percent by mass of cement. 9 PACKING 9.1 The cement shall be packed in bags, jute sacking bag conforming to Woven HDPE conforming to IS 11653, multi wall paper conforming to IS11761or any other suitable bag bearing the manufacturer’s name or his registered trade-mark, if any. The word ‘Micro Portland cement’, and the number of bags (net mass) to the tonne or the nominal average net mass of the cement shall be legibly and indelibly marked on each bag. Bags shall be in good condition at the time of inspection. 9.1.1 Similar information shall be provided in the delivery advices accompanying the shipment of packed or bulk cement. 9.2 The average net mass of cement per bag shall be 25 kg or mutually agreed between the purchaser and the seller. 9.2.1 The average net mass of cement per bag may also be 25 kg subject to tolerances as given in 9.2.1.1 and packed in suitable bags as agreed to between the purchaser and the manufacturer. 9.2.1.1 The number of bags in a sample taken for weighment showing a minus error greater than 2 percent of the specified net mass shall be not more than 5 percent of the bags in the sample. Also the minus error in none of such bags in the sample shall exceed 4 percent of the specified net mass of cement in the bag. However, the average net mass of cement in a sample shall be equal to or more than 25kg. 9.3 Supplies of cement in bulk may be made by arrangement between the purchaser and the supplier (manufacturer or stockist).

Note – A single bag or container containing 1000 kg and more, net mass of cement shall be considered as the bulk supply of cement. Supplies of cement may also be made in intermediate containers, for example, drums of 299 kg, by agreement between the purchaser and the manufacturer.

9.4 When cement is intended for export and if the purchaser so requires, packing of cement may be done in bags or in drums with net quantity of cement per bag or drum as agreed to between the purchaser and the manufacturer. 9.4.1 For this purpose, the permission of the certifying authority shall be obtained in advance for each export order. 9.4.2 The words ‘FOR EXPORT’ and the net quantity of cement per bag/drum shall be clearly marked in indelible ink on each bag/drum. 9.4.3 The packing material shall be as agreed to between the manufacturer and the purchaser. 9.4.4 The tolerance requirements for the quantity of cement packed in bags/drum shall be as given in 9.2.1 except the net quantity which shall be equal to or more than the quantity in 9.3. 10 MARKING 10.1 Each bag or drum of cement shall be legibly and indelibly marked with the following:

a) Manufacturer’s name and his registered trade-mark; b) The name ‘Microfine cement’; c) Net quantity, in kg; d) The words ‘Use no Hooks’ on the bags; e) Batch/control unit number in terms of week, month and year of packing; f) Address of the manufacturer; and

10.2 Similar information shall be provided in the delivery advices accompanying the shipment of packed or bulk cement and on cement drums (see9.3). 10.3 BIS Certification Marking The cement may also be marked with the Standard Mark. 10.3.1 The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which a license for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. 11 SAMPLING 11.1 A sample or samples for testing may be taken by the purchaser or his representative, or by way person appointed to superintend the work for purpose of which the cement is required or by the latter’s representative.

11.1.1 The samples shall be taken within three weeks of the delivery and all the tests shall be commenced within one week of sampling. 11.1.2 When it is not possible to test the samples within one week, the samples shall be packed and stored in air-tight containers till such time that they are tested. 11.2 In addition to the requirements of 11.1, the methods and procedure of sampling shall be in accordance with IS 3335. 11.3 Facilities for Sampling and Identification The manufacturer or the supplier shall afford every facility, and shall provide all labour and materials for taking and packing all labour and materials for taking and packing the samples for testing the cement and for subsequent identification of cement sampled. 12 TESTS 12.1 The sample or samples of cement for test shall be taken as described in 10 and shall be tested in the manner described in the relevant clauses. 12.2 Temperature for testing The temperature range within which physical tests may be carried out shall, as far as possible, be 27 ± 2oC. The actual temperature during the testing shall be recorded. 12.3 Independent Testing 12.3.1 If the purchaser or his representative requires independent tests, the samples shall be taken before or immediately after delivery as the option of the purchaser or his representative and the tests shall be carried out in accordance with this standard on the written instructions of the purchaser or his representative. 12.3.2 Cost of Testing The manufacturer shall supply, free of charge, the cement required for testing. Unless otherwise specified in the enquiry and order, the cost of the tests shall be borne as follows: a) By the manufacturer if the results show that the cement does not comply with

the requirements of this standard and

b) By the purchaser if the results show that the cement complies with the

requirement of this standard.

12.3.3 After a representative sample has been drawn, tests on the sample shall be carried out as expeditiously as possible (see11.1.1 and 11.1.2). 13 REJECTION 13.1 Portland micro-fine cement may be rejected if it does not comply with any of the requirements of this specification.

13.2 Portland micro-fine cement remaining in bulk storage at the mill, prior to shipment, for more than six months, or cement in bags, in local storage in the hands of a vendor for more than 3 months after completion of tests, may be retested before use and may be rejected if it fails to conform to any of the requirements of this specification.

ANNEX A

(Clause 2)

LIST OF REFERRED STANDARDS

IS No. Title

IS 269:2015 Specification for ordinary Portland cement(Sixth Revision) IS 650: 1991 Specification for Standard Sand for Testing of Cement(Second

Revision) IS 3535:1986 Methods of sampling hydraulic cement (First Revision) IS 4031(Part 1):1996 Methods of physical tests for hydraulic cement: Part 1

Determination of fineness by dry sieving (Second Revision) IS 4031(Part 2):1999 Methods of physical tests for hydraulic cement: Part 2

Determination of fineness by specific surface by Blaine air permeability method (Second Revision)

IS 4031(Part 3):1988 Methods of physical tests for hydraulic cement: Part 3 Determination of soundness(First Revision)

IS 4031(Part 4):1988 Methods of physical tests for hydraulic cement: Part 4 Determination of consistency of standard cement paste (First Revision)

IS 4031(Part 5):1988 Methods of physical tests for hydraulic cement: Part 5 Determination of initial and final setting times (First Revision)

IS 4031(Part 6):1988 Methods of physical tests for hydraulic cement: Part 6 Determination of compressive strength of hydraulic cement other than masonry cement (First Revision)

IS 4031(Part 7):1988 Methods of physical tests for hydraulic cement: Part 7 Determination of compressive strength of masonry cement (First Revision)

IS 4031(Part 8):1988 Methods of physical tests for hydraulic cement: Part 8 Determination of transverse and compressive strength of plastic mortar using prism (First Revision)

IS 4031(Part 9):1988 Methods of physical tests for hydraulic cement: Part 9 Determination of heat of hydration (First Revision)

IS 4031(Part 10):1988 Methods of physical tests for hydraulic cement: Part 10 Determination of drying shrinkage (First Revision)

IS 4031(Part 11):1988 Methods of physical tests for hydraulic cement: Part 11 Determination of density (First Revision)

IS 4031(Part 12):1988 Methods of physical tests for hydraulic cement: Part 12 Determination of air content of hydraulic cement mortar (First Revision)

IS 4031(Part 13):1988 Methods of physical tests for hydraulic cement: Part 13 Measurement of Water Retentivity of Masonry Cement (First Revision)

IS 4031(Part 14):1989 Methods of physical tests for hydraulic cement: Part 14 Determination of false set.

IS 4031(Part 15):1991 Methods of physical tests for hydraulic cement: Part 15 Determination of fineness by wet sieving.

IS 4032:1985 Method of chemical analysis of hydraulic cement (First Revision) IS 4082:1996 Recommendation on stacking and storage of construction

materials and components at site (Second Revision) IS 4845:1968 Definitions and terminology relating to hydraulic cement IS 4905:2015 Random Sampling and Randomization Procedures (First Revision) IS 11652:2000 Textiles - Woven Sacks for Packing Cement - High Density

Polyethylene (HDPE)/Polypropylene (PP)(Second Revision) IS 11761:1997 Specification for Multi wall paper sacks for cement (First Revision)

ANNEX B (Clause 6.3)

DETERMINING THE INITIAL AND FINAL SETTING TIME TEST FOR MICROFINE

CEMENT B-1To determine the initial and final setting time of grout the grout is prepared with 1:1 ratio of water to Microfine cement. B-2Test Procedure: The laboratory in which test is carried out shall be maintained as a temperature of 27 ± 20C and humidity >65 percent. Fill the prepared grout in the Vicatmould completely and level the top surface.Place the above mould under the rod bearing needle.Use initial setting time needle of 0.5 mm dia.Gently lower the needle until it comes in contact with the surface of the test block and release quickly.Repeat the above until the needle fails to penetrate the block beyond the above until the needle fails to penetrate the block beyond 5 ± 0.5 mm measured from the bottom of the mould.Record the initial setting time as the period elapsing between the time when water is added and the time at which the needle fails to penetrate the test block to a point 5 ± 0.5 mm from the bottom.For determination of final setting time, replace the needle of Vicat apparatus by the needle with an annular attachment.The microcement shall be considered as finally set when, upon applying the needle gently to the surface of test block, the attachment fails to do so.Record the final setting time as the period elapsing between the time when water is added and the time at which the needle makes an impression, while the annular attachment fails to do so.

ANNEX C

(Clause 6.4)

DETERMINIG THE PERCENTAGE BLEED WATER OF MICROFINE CEMENT

C-1 To determine the percentage bleed water of microfinecement Grout (with 1:1

water to microfinecement ratio), the grout is prepared as in Marsh Cone Flow Test.

Sample of the same grout can be used for this test.

C-2 Test Procedure -- The laboratory in which test is carried out shall be maintained

at a temperature of 27 ± 20C and humidity >65 percent.

Fill the prepared grout in a 1000 ml measuring cylinder upto the level of 700 ml and leave as it is.After 1 hour, measure the volume of bleed water above the grout. Calculation for % Bleed Water:

% Bleed water = (V1 /V) x 100

V1 -- Volume of bleed water

V -- Grout volume as 700 ml.