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    Pamphlet On Requirements of Portland Slag Cement As Per Is 455-2015 - English

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    naveen kumar pathi
    Portland slag cement is manufactured by mixing slag with Portland cement in an intimately interground mixture. Slag content should be between 25-70% by mass. It provides excellent resistance to sulfates and chlorides. The document outlines the physical and chemical requirements for Portland slag cement according to IS 455:2015, including requirements for fineness, soundness, setting time, compressive strength, insoluble residue, magnesia content, sulfur and chloride content, and alkali content. Cement bags must be marked with production details, batch number, and expiration date.

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    Pamphlet On Requirements of Portland Slag Cement As Per Is 455-2015 - English

    Uploaded by

    naveen kumar pathi
    25 views2 pages
    Portland slag cement is manufactured by mixing slag with Portland cement in an intimately interground mixture. Slag content should be between 25-70% by mass. It provides excellent resistance to sulfates and chlorides. The document outlines the physical and chemical requirements for Portland slag cement according to IS 455:2015, including requirements for fineness, soundness, setting time, compressive strength, insoluble residue, magnesia content, sulfur and chloride content, and alkali content. Cement bags must be marked with production details, batch number, and expiration date.

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    Pamphlet on Requirements of Portland Slag Cement as Per is 455-2015- English

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    Portland slag cement is manufactured by mixing slag with Portland cement in an intimately interground mixture. Slag content should be between 25-70% by mass. It provides excellent resistance to sulfates and chlorides. The document outlines the physical and chemical requirements for Portland slag cement according to IS 455:2015, including requirements for fineness, soundness, setting time, compressive strength, insoluble residue, magnesia content, sulfur and chloride content, and alkali content. Cement bags must be marked with production details, batch number, and expiration date.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    25 views2 pages

    Pamphlet On Requirements of Portland Slag Cement As Per Is 455-2015 - English

    Uploaded by

    naveen kumar pathi
    Portland slag cement is manufactured by mixing slag with Portland cement in an intimately interground mixture. Slag content should be between 25-70% by mass. It provides excellent resistance to sulfates and chlorides. The document outlines the physical and chemical requirements for Portland slag cement according to IS 455:2015, including requirements for fineness, soundness, setting time, compressive strength, insoluble residue, magnesia content, sulfur and chloride content, and alkali content. Cement bags must be marked with production details, batch number, and expiration date.

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    © All Rights Reserved
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    of 2

    भारत सरकार - GOVERNMENT OF INDIA

    रे ल मंत्रालय - MINISTRY OF RAILWAYS


    (An ISO: 9001-2015 Certified Organization)

    (केवल कायाालयीन उपयोग हे तु /


    महाराजपुर, ग्वाललयर – 475005,
    For Official use only)
    Maharajpur, Gwalior – 474005
    Telephone : 0751-2470869, Fax : 0751-2470841
    E-mail :dircivilcamtech@gmail.com

    Requirements of Portland Slag Cement


    (As per IS 455:2015) (Re affirmed 2020)
    CAMTECH/C/2022/Portland Slag Cement/1.0
    September - 2022
    Portland Slag Cement:

    Portland slag cement as its name implies, is manufactured by mixing slag in the Portland cement. It is an
    intimately inter ground mixture of Portland cement, clinkers and granulated slag with addition of gypsum and
    permitted additives or intimate and uniform blend of Ordinary Portland cement and finely ground granulated slag.

    Slag is a non metallic product consisting essentially of glass containing silicate and alumino-silicate(Als) of lime
    and other base.

    Granulated slag constituent should not be less than 25% and not more than 70 % by mass of Portland slag cement.
    The homogeneity of mixture shall be guaranteed within ± 3% of the declared slag addition.

    Portland slag cement provide excellent resistance to sulphate and chloride and has excellent corrosion resistance
    properties. Hence, it is widely used in coastal region, sewage disposal and water treatment plants.

    The physical and chemical requirements of Portland slag Cement is tabulated overleaf. The cement may be
    rejected, if it does not comply with any of these requirements. The sample shall be taken within three weeks of
    the delivery and all the tests shall be commenced within one week of sampling. When it is not possible to test the
    sample within one week, the sample shall be packed and stored in air tight containers and tested at the earliest but
    not later than 3 months since the receipt of sample for testing. Cement remaining in bulk storage at the factory,
    prior to shipment, for more than six months, or cement in bags, in local storage such as, in the hands of vendor for
    more than 03 months after completion of tests, shall be re-tested before use.

    The net quantity of cement per bag shall be 50 kg unless otherwise specified. Each bag of cement shall be legibly
    and indelibly marked with the following:
    (a) Manufacturer's name and his registered trademark, if any.
    (b) The words ‘Portland Slag Cement.
    (c) Net quantity in Kg.
    (d) Words ‘ use no kook’ on the bag.
    (e) Batch/control unit no. in terms of week, month and year of packing.
    (f) Waste before date (i.e. 3 months from date of packing)
    (g) Need for testing of cement more than3 months old to check conformity before its use.
    (h) Address of manufacturer.
    (i) Percentage of slag addition.
    DISCLAIMER
    The information contained in this pamphlet does not supersede any existing provisions laid down in RDSO &
    Railway Board instructions. This document is not statutory & instructions given in it are for the purpose of
    guidance only.
    Requirements of Portland Slag Cement
    (As per IS 455: 2015) (Re affirmed 2020)
    Method
    SN Material / Test of Test, Rapid hardening Portland cement
    Ref to
    1 PHYSICAL TESTS (Ref: Clause – 7, Table 2 of IS 455:2015)
    A Fineness:

    By Blaine’s air permeability method. IS 4031 ≮ 225


    (Specific surface in m²/kg) (Part 2)
    B Soundness:
    Expansion of un aerated cement in mm, IS 4031 ≯ 10
    a) By Le-Chatelier Method. (Part 3)
    Expansion of un aerated cement in percentage ≯ 0.8
    b) By Autoclave Test Method.
    Note: In the event of cements failing to comply with any one or both the requirements of soundness as specified,
    further tests in respect of each failure shall be made as described in IS 4031 (Part 3), from another portion of the
    same sample after aeration. The aeration shall be done by spreading out the sample to a depth of 75mm at a
    relative humidity of 50 to 80 percent of a total period of 7 days. The expansion of cements so aerated shall be not
    more than 5mm and 0.6 percent when tested by Le-Chatelier method and autoclave test respectively.
    C Setting time:
    a) Initial setting in minutes, IS 4031 ≮ 30
    (By Vicat apparatus method) (Part 5)
    b) Final setting in minutes, ≯ 600
    (By Vicat apparatus method)
    Note: If cement exhibits false set, the ratio of final penetration measured after 5 min of completion of mixing
    period to the initial penetration measured exactly after 20 second of completion of mixing period, expressed as
    percent, shall be not less than 50. In the event of cement exhibiting false set, the initial and final setting time of
    cement when tested by the method described in IS 4031 (Part 5) after breaking the false set, shall conform to the
    values given above.
    D Compressive Strength, MPa (N/mm2):
    a) 72 ± 1 hour. IS 4031 ≮ 16
    b) 168 ± 2 hour. (Part 6) ≮ 22
    b) 672 ± 4 hour. ≮ 33
    E Transverse Strength (optional) IS 4031 Mutually agreed to between the purchaser and the
    (Part 8) supplier at the time of placing the order
    2 CHEMICAL TESTS (Ref: Clause – 6, Table 1 of IS 455:2015)
    A Insoluble residue percent by mass.
    ≯4
    B Magnesia, percent by mass. ≯ 10

    C Total Sulphur content calculated as Sulphuric ≯ 3.5


    Anhydride (SO₃), percent by mass.

    D Sulphide sulphur (S), Max ≯ 1.5


    E Total Loss on ignition, percent by mass. ≯5.0

    F Chloride content, percent by mass. (Max) IS 12243 0.1


    0.05 (for pre-stressed structures)
    G Alkali content expressed as Sodium oxide. (Na2O) < 0.6

    Note: On large and important jobs where concrete is likely to be exposed to humid or wetting action, it is
    advisable that the aggregate to be tested for alkali aggregate reaction. However, in the case of cement having a
    minimum slag content of 50%, a maximum alkali content of 0.9%, expressed as sodium oxide (Na2O+ 0.658 K2O) is
    recommended. In the case of reactive aggregates, the use of cement with alkali content below 0.6 percent
    expressed as sodium oxide (Na2O+ 0.658 K2O), is recommended.

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