IS 4031-4 (1988): Methods of physical tests for hydraulic ...

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2 1 + , 1 + 0 1 ' 5 . Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru The Right to Information, The Right to Live Step Out From the Old to the New . IS 4031-4 (1988): Methods of physical tests for hydraulic cement, Part 4: determination of consistency of standard cement paste [CED 2: Cement and Concrete]. ! $ ' + - . Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge . ! > 0 B .. Bhart hari N ti atakam Knowledge is such a treasure which cannot be stolen . IS :4031 ( Part 4)- 1988. ( Reaffirmed (Reaffirmed 2005. 1995) ). Indian Standard METHODSOFPHYSICALTESTSFOR.

3 HYDRAULICCEMENT. PART 4 determination OF consistency OF STANDARD CEMENT PASTE. ( First Revision ). Third Reprht OCTOBER 1997. ( hcqorating Amendment No. 1 ). UDC @ Copyright 1997. BUREAU OF INDIAN STANDARDS. MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG. NEW DELHI I 10002. i Gr 1 August 1988. IS : 4031 ( Pat 4 ) - 1988. h&an Standard METHODSOFPHYSICALTESTSFOR. HYDRAULICCEMENT. PART 4 determination OF consistency OF STANDARD CEMENT PASTE. ( First Revision ). 0. FOREWORD. This Indian Standard ( Part 4 ) ( First Revi- standard in 1968, a number of standards covering sion > was adopted by the Bureau of Indian the requirements of different equipment used for Standards on 24 February 1988, after the draft testing of cement, a brief description of which finalized by the Cement and Concrete Sectional was also covered in the standard, had been Committee had been approved by the Civil Engi- published.)

4 In this revision, therefore, reference neering Division Council. is given to different instrument specifications Standard Methods of testing cement are deleting the description of the instruments as it essential adjunct to the cement specifications. has been recognized that reproducible and repeat- This standard in different parts lays down the able test results can be obtained only with procedure for the tests to evaluate physical standard testing equipment capable of giving properties of different types of hydraulic cements. desired level of accuracy. This part covers the The procedure for conducting chemical tests of procedure for determining the quantity of water hydraulic cement is covered in IS : 4032-1985*.

5 Required to produce a cement paste of standard Originally all the tests to evaluate the physical consistency . properties of hydraulic cement were covered in For the purpose of deciding whether a parti- one standard but fdr facilitating the use of this cular requirement of this standard is complied standard and future revisions, it has been decided with, the final .value, observed or calculated, to print different tests as different parts of the expressing the result of a test or analysis, shall standard and, accordingly this revised standard be rounded off in accordance with IS : 2-1960*.

6 Has been brought out in thirteen parts. This The number of significant places retained in the will also facilitate updating of individual tests . rounded off value should be the same as that of Further, since the publication of the original the specified value in this standard. *Method of chemical analysis of hydraulic cement (first revision ). *Rules for rounding off numerical values ( revised ). 1. SCOPE 27 f 2 C. The relative humidity of the labora- This standard ( Part 4 ) covers the procedure tory shall be 65 f 5 percent. for determining the quantity of water required 4.

7 APPARATUS. to produce a dement paste of standard consis- Vicat Apparatus -Vicat apparatus con- tency. forming to IS : 5513-1976*. 2. SAMPLING AND SELECTION OF TEST Balance - The balance shall conform to the SPECIMEN following requirements. The samples of the cement shall be taken in On balance in use, the permissible varia- accordance with the requirements of IS : 3535- tion at a load of 1 000 g shall be plus or minus 1986* and the relevant standard specification for 1'0 g. The permissible variation on new balance the type of cement being tested. The represen- shall be one-half of this value.

8 The sensibility tative sample of the cement selected as above reciprocal shall not be greater than twice the shall be thoroughly mixed before testing. permissible variation. 3. TEMPERATURE AND HUMIDITY NOTE1 -The sensibility reciprocal is generally defined as the change in load required to change the The temperature of moulding room, dry position of rest of the indicating element or elements of materials and water shall be maintained at a non-automatic indicating scale a definite amount at any load. * Methods of sampling hydraulic cements (first revision ).

9 *Specification for Vicat apparatus ( jrsr revisiorz ). 1. IS : 4031 ( Part 4 ) - 1988. NOTE 2 - Self-indicating balance with equivalent Prepare a paste of weighed quantity of accuracy may also be used. Cement with a weighed quantity of potable or Standard Weights - The permissible vari- distilled water, taking care that the time of ation on weights in use in weighing the cement gauging is not less than 3 minutes, nor more shall be as prescribed in Table 1. than 5 min, and the gauging shall be completed before any sign of setting occurs. The gauging TABLE 1 PERMISSIBLE VARIATION time shall be counted from the time of adding ON WEIGHTS water to the dry cement until commencing to WEIC4llT PEIGUISSIBLE VAIIIATION ON fill the mould.

10 Fill the Vicat mould E with this WEIOHTS IN USE,PLUS OR paste, the mould resting upon a non-porous MINUS plate. After completely filling the mould, B g smoothen the surface of the paste, making it 500 level with the top of the mould. The mould 300 0'30 may be slightly shaken to expel the 250 0'25 Clean appliances shall be used for 200 020 In filling the mould, the operator's 100 ~%n%d the blade of the gauging trowel shall 50 0'10 alone be used. 20 0'05. Place the test block in the mould, together 10 094 with the non-porous resting plate, under the 5 rod bearing the plunger; lower the plunger gently 2 to touch the surface of the test block, and 1 quickly release, allowing it to sink into the paste.